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1 -servo-erector-set-robots-kits.ses-v1-robots.ses-v1-bipeds.WebHome
1 +ses-v1.ses-v1-robots.ses-v1-bipeds.WebHome
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2 -<body><table border="0" cellpadding="0" cellspacing="0" >
3 - <tbody><tr>
4 - <td valign="top" align="left"><b><font face="Verdana" size="2">Biped BRAT Autonomous Tutorial.</font></b>
5 - <p><b><font face="Verdana" size="2">Updated <!--webbot bot="Timestamp" startspan s-type="EDITED" s-format="%m/%d/%Y" -->
6 - <!-- #BeginDate format:Am3 -->12/20/2011<!-- #EndDate -->
7 - </font></b></p>
8 - <p><font face="Verdana" size="2"><b>Safety first!</b> Wear eye protection and never touch a powered robot!</font></p>
9 - <p><font face="Verdana" size="2"><b>Note:</b> This tutorial uses the Bot Board II, BASIC Atom Pro 28, a Sharp GP2D12 sensor, and a Buffered
10 - 2-Axis Accelerometer (DE-11).</font></p>
11 - <p><font face="Verdana" size="2"><b>Software:</b><br>
12 - &nbsp;&nbsp;- BASIC Micro Studio<br>
13 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratosf3.zip">BRAT Servo Offset Finder
14 - Program v3</a> (09/16/09)<br>
15 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat1.zip">Autonomous Walk Code</a>
16 - (09/16/09)<br>
17 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat2.zip">Autonomous GP2D12 Code</a>
18 - (09/16/09)<br>
19 - &nbsp; -- Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/avoid01.mpg">Avoiding an obstacle (mpg)</a><br>
20 - &nbsp; -- Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/break01.mpg">Taking a break (mpg)</a><br>
21 - &nbsp; -- Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/walkaway.mpg">Demonstrating proximity beeps (mpg)</a><br>
22 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat3.zip">Autonomous 1-Axis Accelerometer Code</a>
23 - (09/16/09)<br>
24 - &nbsp; -- Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/getup01.mpg">Getting up front and back (mpg)</a><br>
25 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat4.zip">Autonomous 2-Axis Accelerometer Code</a>
26 - (09/16/09)<br>
27 - &nbsp; -- Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/getup02.mpg">Getting up front and side (mpg)</a></font></p></td>
28 - <td align="center" valign="top" width="320"><font face="Verdana" size="2"><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/brat00.jpg" border="2" hspace="10" ><br>
29 - <strong>Image of Biped BRAT.</strong></font></td>
30 - </tr>
31 - <tr>
32 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2">&nbsp;</font></td>
33 - </tr>
34 - <tr>
35 - <td valign="top" align="left"><font face="Verdana" size="2"><b>Step 1.</b><br>
36 - Make sure your servos are plugged into the appropriate channels, as shown in Table 1.</font>
37 - <p><font face="Verdana" size="2">*Note, P9 is used by the speaker, so we can't plug a servo in there.</font></p></td>
38 - <td align="left" valign="top" >
39 - <div align="center">
40 - <center>
41 - <table border="1" bordercolor="#FFFFFF" >
42 - <tbody><tr>
43 - <td >
44 - <div align="center">
45 - <table border="1" bordercolor="#000000" >
46 - <tbody><tr>
47 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2"><b>Bot Board I/O</b></font></td>
48 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2"><b>Connection</b></font></td>
49 - </tr>
50 - <tr>
51 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P4</font></td>
52 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">Left Ankle</font></td>
53 - </tr>
54 - <tr>
55 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P5</font></td>
56 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">Left Knee</font></td>
57 - </tr>
58 - <tr>
59 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P6</font></td>
60 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">Left Hip</font></td>
61 - </tr>
62 - <tr>
63 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P7</font></td>
64 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">Right Ankle</font></td>
65 - </tr>
66 - <tr>
67 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P8</font></td>
68 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">Right Knee</font></td>
69 - </tr>
70 - <tr>
71 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P10</font></td>
72 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">Right Hip</font></td>
73 - </tr>
74 - </tbody></table>
75 - </div></td>
76 - </tr>
77 - <tr>
78 - <td bordercolor="#FFFFFF">
79 - <p align="center"><font face="Verdana" size="2">Table 1.</font></p></td>
80 - </tr>
81 - </tbody></table>
82 - </center></div>
83 - </td>
84 - </tr>
85 - <tr>
86 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2">&nbsp;</font></td>
87 - </tr>
88 - <tr>
89 - <td valign="top" align="left"><font face="Verdana" size="2"><b>Step 2.</b><br>
90 - Make sure the Bot Board's jumpers are set according to Table 2.</font>
91 - <p><font face="Verdana" size="2">Refer to Figure 2 for help with jumper settings.</font></p>
92 - <p><font face="Verdana" size="2">*Note, the VS to AX0 jumper enables the program to monitor the servo battery voltage. When the battery is low,
93 - the robot can beep in warning.</font></p></td>
94 - <td align="left" valign="top" >
95 - <div align="center">
96 - <center>
97 - <table border="1" bordercolor="#FFFFFF" >
98 - <tbody><tr>
99 - <td >
100 - <div align="center">
101 - <table border="1" bordercolor="#000000" >
102 - <tbody><tr>
103 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0" colspan="2"><font face="Verdana" size="2"><b>Bot Board II
104 - Jumper Settings</b></font></td>
105 - </tr>
106 - <tr>
107 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">Enable</font></td>
108 -
109 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">A, B, and C buttons</font></td>
110 - </tr>
111 - <tr>
112 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">5v</font></td>
113 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">I/O Group 0-3</font></td>
114 - </tr>
115 - <tr>
116 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">VS</font></td>
117 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">I/O Groups 4-7 and 8-11</font></td>
118 - </tr>
119 - <tr>
120 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">Enable</font></td>
121 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">SPKEN (Speaker Enable)</font></td>
122 - </tr>
123 - <tr>
124 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">Enable</font></td>
125 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">VS (Servo Voltage) to AX0 (P16)</font></td>
126 - </tr>
127 - </tbody></table>
128 - </div></td>
129 - </tr>
130 - <tr>
131 - <td bordercolor="#FFFFFF">
132 - <p align="center"><font face="Verdana" size="2">Table 2.</font></p></td>
133 - </tr>
134 - </tbody></table>
135 - </center></div>
136 - </td>
137 - </tr>
138 - <tr>
139 - <td valign="top" align="left" colspan="2"><br class="pb">
140 - </td>
141 - </tr>
142 - <tr>
143 - <td valign="top" align="left" colspan="2">
144 - <p align="center"><font face="Verdana" size="2">&nbsp;<img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/autobrat.gif" border="0" hspace="10"><br>
145 - Figure 2.</font></p>
146 - </td>
147 - </tr>
148 - <tr>
149 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2">&nbsp;</font></td>
150 - </tr>
151 - <tr>
152 - <td valign="top" align="left"><font face="Verdana" size="2"><b>Step 3.</b><br>
153 - Download and install the BASIC Micro Studio. Download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratosf3.zip">BRAT Servo Offset Finder program</a>, and load it into the IDE.</font>
154 - <p><font face="Verdana" size="2">Program the Atom Pro, and follow these instructions to find your robot's offsets.</font></p>
155 - <ul>
156 - <li><font face="Verdana" size="2">Press A to decrease the servo offset by 5us.</font></li>
157 - <li><font face="Verdana" size="2">Press C to increase the servo offset by 5us.</font></li>
158 - <li><font face="Verdana" size="2">Press B to change which servo is being manipulated, and to
159 - save your offsets. The order of the
160 - program is shown in Figure 3.</font></li>
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29 + <h1 class="asm">Biped BRAT Autonomous Tutorial</h1>
30 + <p><b>Updated December 20, 2011</b></p>
31 + <p><span class="asm-warning">Safety first!</span> Wear eye protection and never touch a powered robot!</p>
32 + <p><b>Hardware required:</b> Bot Board II, BASIC Atom Pro 28, Sharp GP2D12 sensor, Buffered 2-Axis Accelerometer (DE-11).</p>
33 + <p><b>Software &amp; downloads:</b></p>
34 + <ul style="padding-left:1.2rem; margin-top:0.25rem; line-height:1.8;">
35 + <li>BASIC Micro Studio</li>
36 + <li><a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratosf3.zip">BRAT Servo Offset Finder Program v3</a></li>
37 + <li><a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat1.zip">Autonomous Walk Code</a></li>
38 + <li><a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat2.zip">Autonomous GP2D12 Code</a> — Videos: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/avoid01.mpg">Avoiding obstacle</a> · <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/break01.mpg">Taking a break</a> · <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/walkaway.mpg">Proximity beeps</a></li>
39 + <li><a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat3.zip">Autonomous 1-Axis Accelerometer Code</a> — Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/getup01.mpg">Getting up front and back</a></li>
40 + <li><a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat4.zip">Autonomous 2-Axis Accelerometer Code</a> — Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/getup02.mpg">Getting up front and side</a></li>
161 161   </ul>
162 - <p><font face="Verdana" size="2">Note, if you have the Speaker enabled, when you press the B button you will hear a short tone. The tone will
163 - raise in pitch when you change from servo to servo, and will lower in pitch and be longer when you get back to Start.</font></p></td>
164 - <td align="left" valign="top" >
165 - <p align="center"><font face="Verdana" size="2"><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratosf3.jpg" border="2" hspace="10" ><br>
166 - Figure 3.</font></p></td>
167 - </tr>
168 - <tr>
169 - <td valign="top" align="left" colspan="2"><br class="pb">
170 - </td>
171 - </tr>
172 - <tr>
173 - <td valign="top" align="left"><font face="Verdana" size="2"><b>Step
174 - 4.</b><br>
175 - Place the robot in a position as close to neutral as possible, and turn it on. Your robot should go to and hold the neutral position, and should
176 - resemble figures 4-1 through 4-3. If the joints are off by more than 15° you may have made an error in assembly. To correct this, remove the
177 - center screw from the round servo horn, pull the servo horn off the servo, rotate until it's aligned, then reattach the servo horn.</font>
178 - <p><font face="Verdana" size="2">Use the A, B, and C buttons to straighten the BRAT as shown in Figures
179 - 4-1, 4-2, and 4-3.</font></p>
180 - <p><font face="Verdana" size="2">Note, if you are building the robot with HS-422 servos, you will notice the hip servos oscillate if the robot
181 - is lifted off the ground. This is normal, and is due to the lower power servo. When the robot is walking, the effects are minimal. Using a
182 - voltage that is higher than 6vdc will make the oscillations worse. When building a robot with more powerful servos such as HS-475,
183 - HS-485, or HS-645, you
184 - will not see this effect.</font></p>
185 - <p><font face="Verdana" size="2"><b>After you've cycled through the servos and adjusted them to match Figures
186 - 4-1 through 4-3, pressing the B button again will save your servo offset
187 - values to the Atom Pro's EEPROM.</b></font></p>
188 - </td>
189 - <td align="left" valign="top" >
190 - <p align="center"><font face="Verdana" size="2"><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/brat10.jpg" border="2" hspace="10" ><br>
191 - Figure 4-1.</font></p></td>
192 - </tr>
193 - <tr>
194 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2">&nbsp;</font></td>
195 - </tr>
196 - <tr>
197 - <td valign="top" align="left">
198 - <p align="center"><font face="Verdana" size="2"><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/brat07.jpg" border="2" hspace="10" ><br>
199 - Figure 4-2.</font></p>
200 - </td>
201 - <td align="left" valign="top" >
202 - <p align="center"><font face="Verdana" size="2"><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/brat04.jpg" border="2" hspace="10" ><br>
203 - Figure 4-3.</font></p></td>
204 - </tr>
205 - <tr>
206 - <td valign="top" align="left" colspan="2"><br class="pb">
207 - </td>
208 - </tr>
209 - <tr>
210 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2"><b>Step
211 - 5.</b><br>
212 - Now download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat1.zip">BRAT Autonomous Walk Code</a>, load it into the
213 - IDE, and program your BRAT.</font>
214 - <p><font face="Verdana" size="2">Congratulations, your BRAT will now be able to walk around! The autonomous walk program will make the BRAT
215 - follow this sequence: walk, walk, walk, turn, long-stride, long-stride, kick, turn, stop.</font></p>
216 - <p><font face="Verdana" size="2">To change the behavior of your robot, you can modify the code below the label "main" and above the
217 - label "move". You can also create sequences following the format shown in the code below the label "move". We will provide
218 - several more code examples including common sensors.</font></p></td>
219 - </tr>
220 - <tr>
221 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2">&nbsp;</font></td>
222 - </tr>
223 - <tr>
224 - <td valign="top" align="left"><font face="Verdana" size="2"><b>Step
225 - 6.</b><br>
226 - Use double-sided tape to attach the GP2D12 sensor to the BRAT's head area. The exact position doesn't matter too much, as long as the sensor is
227 - facing toward the front of the robot.</font>
228 - <p><font face="Verdana" size="2">Plug the sensor in to the channel shown in the following table.</font></p>
229 - <div align="center">
230 - <center>
231 - <table border="1" bordercolor="#FFFFFF" >
232 - <tbody><tr>
233 - <td >
234 - <div align="center">
235 - <table border="1" bordercolor="#000000" >
236 - <tbody><tr>
237 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2"><b>Bot Board I/O</b></font></td>
238 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2"><b>Connection</b></font></td>
239 - </tr>
240 - <tr>
241 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P19 (AX3)</font></td>
242 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">GP2D12 Sensor</font></td>
243 - </tr>
244 - </tbody></table>
245 - </div></td>
246 - </tr>
247 - <tr>
248 - <td bordercolor="#FFFFFF">
249 - <p align="center"><font face="Verdana" size="2">Table 6.</font></p></td>
250 - </tr>
251 - </tbody></table>
252 - </center></div>
253 - </td>
254 - <td align="left" valign="top" >
255 - <p align="center"><font face="Verdana" size="2"><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratsens.jpg" border="2" hspace="10" ><br>
256 - Figure 6.</font></p></td>
257 - </tr>
258 - <tr>
259 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2">&nbsp;</font></td>
260 - </tr>
261 - <tr>
262 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2"><b>Step
263 - 7.</b><br>
264 - Now download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat2.zip">BRAT Autonomous GP2D12 Code</a>, load it into the
265 - IDE, and program your BRAT.</font>
266 - <p><font face="Verdana" size="2">Congratulations, your BRAT will now be able to roam without bumping into anything! We also added a
267 - "behavior" looping counter so the robot will periodically go into a resting position. You can edit the pauses to change how long it
268 - rests and you can change the value of the looping counter to change how often it rests. The GP2D12 sensor is read before each step when the
269 - robot is walking forward. You will hear a short low beep if nothing is detected. If an object is detected, the beep raises in pitch depending on
270 - how close the object is. When the object is about 8" away, the robot will back up one step, turn left two steps, then continue forward. The
271 - code also illuminates LEDs depending on which command is being processed.</font></p>
272 - <p><font face="Verdana" size="2">Check out these videos:<br>
273 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/avoid01.mpg">Avoiding an obstacle (mpg)</a><br>
274 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/break01.mpg">Taking a break (mpg)</a><br>
275 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/walkaway.mpg">Demonstrating proximity beeps (mpg)</a></font></p></td>
276 - </tr>
277 - <tr>
278 - <td valign="top" align="left" colspan="2"><br class="pb">
279 - </td>
280 - </tr>
281 - <tr>
282 - <td valign="top" align="left"><font face="Verdana" size="2"><b>Step
283 - 8.</b><br>
284 - Use double-sided tape to attach the accelerometer sensor to the BRAT's head area. With the accelerometer, the sensor's <i>physical position</i>
285 - isn't as important as the <i>axis orientation</i>. Make sure you follow the orientation shown in Figure
286 - 8.</font>
287 - <p><font face="Verdana" size="2">Plug the sensor in to the channel shown in the following table.</font></p>
288 - <div align="center">
289 - <center>
290 - <table border="1" bordercolor="#FFFFFF" >
291 - <tbody><tr>
292 - <td >
293 - <div align="center">
294 - <table border="1" bordercolor="#000000" >
295 - <tbody><tr>
296 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2"><b>Bot Board I/O</b></font></td>
297 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2"><b>Connection</b></font></td>
298 - </tr>
299 - <tr>
300 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P17 (AX1)</font></td>
301 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">Accelerometer Sensor - Y Axis<br>
302 - (Used for Front-to-back tilt)</font></td>
303 - </tr>
304 - <tr>
305 - <td align="center" bordercolor="#808080" bgcolor="#C0C0C0"><font face="Verdana" size="2">P18 (AX2)</font></td>
306 - <td align="center" bordercolor="#C0C0C0" bgcolor="#FFFFFF"><font face="Verdana" size="2">Accelerometer Sensor - X Axis<br>
307 - (Used for Side-to-side tilt)</font></td>
308 - </tr>
309 - </tbody></table>
310 - </div></td>
311 - </tr>
312 - <tr>
313 - <td bordercolor="#FFFFFF">
314 - <p align="center"><font face="Verdana" size="2">Table 8.</font></p></td>
315 - </tr>
316 - </tbody></table>
317 - </center></div>
318 - </td>
319 - <td align="left" valign="top" >
320 - <p align="center"><font face="Verdana" size="2"><img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratacc.jpg" border="2" hspace="10" ><br>
321 - Figure 8.</font></p></td>
322 - </tr>
323 - <tr>
324 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2">&nbsp;</font></td>
325 - </tr>
326 - <tr>
327 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2"><b>Step
328 - 9.</b><br>
329 - Now download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat3.zip">BRAT Autonomous 1-Axis Accelerometer Code</a>, load it into the
330 - IDE, and program your BRAT.</font>
331 - <p><font face="Verdana" size="2"><i>For this program, we are only&nbsp;using the values from the Y Axis.</i> The Y Axis measures the
332 - front-to-back tilt, so the BRAT can tell when it has fallen onto its back or front. We will incorporate the X Axis in a later program.</font></p>
333 - <p><font face="Verdana" size="2">Congratulations, your BRAT will now be able to roam without bumping into anything, and get back up if it falls!</font></p>
334 - <p><font face="Verdana" size="2">Check out this video:<br>
335 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/getup01.mpg">Getting up front and back (mpg)</a></font></p></td>
336 - </tr>
337 - <tr>
338 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2">&nbsp;</font></td>
339 - </tr>
340 - <tr>
341 - <td valign="top" align="left" colspan="2"><font face="Verdana" size="2"><b>Step
342 - 10.</b><br>
343 - Now download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat4.zip">BRAT Autonomous 2-Axis Accelerometer Code</a>, load it into the
344 - IDE, and program your BRAT.</font>
345 - <p><font face="Verdana" size="2">For this program, we have added the accelerometer's X Axis to measure side-to-side tilt. Now if the BRAT falls
346 - onto its side, it will know to roll over in order to get back up. We have also incorporated a more advanced "get up from back"
347 - routine, which will enable robots with lots of cabling or weight in the back to stand one foot at a time. Additionally, we've added a
348 - "startled" behavior. If the BRAT is in resting mode and something is suddenly detected by the GP2D12 sensor, the BRAT will be
349 - startled, lean back, and beep.</font></p>
350 - <p><font face="Verdana" size="2">Congratulations, your BRAT will now be able to roam without bumping into anything, and get back up if it falls!</font></p>
351 - <p><font face="Verdana" size="2">Check out this video:<br>
352 - &nbsp; - <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/getup02.mpg">Getting up front and side (mpg)</a></font></p></td>
353 - </tr>
354 -</tbody></table>
355 -</body>
42 + </div>
43 + <div style="text-align:center; flex:0 1 280px;">
44 + <img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/brat00.jpg" style="max-width:100%; border:1px solid #ccc; border-radius:4px;">
45 + <p style="font-size:12px; color:#666; margin-top:0.3rem;"><b>Biped BRAT.</b></p>
46 + </div>
47 + </div>
48 +
49 + <!-- Step 1 -->
50 + <div class="asm-step">
51 + <div class="asm-step-header">
52 + <div class="asm-step-name">Autonomous — Verify Servo Channel Connections</div>
53 + <div class="asm-step-num">Step 1 / 10</div>
54 + </div>
55 + <div class="asm-step-body">
56 + <div class="asm-step-text">
57 + <p>Make sure your servos are plugged into the appropriate channels per Table 1. Note: P9 is used by the speaker and cannot be used for a servo.</p>
58 + </div>
59 + <div class="asm-step-figure" style="flex: 0 1 auto;">
60 + <table class="ref-table" style="width:auto;">
61 + <tr><th>Bot Board I/O</th><th>Connection</th></tr>
62 + <tr><td>P4</td><td>Left Ankle</td></tr>
63 + <tr><td>P5</td><td>Left Knee</td></tr>
64 + <tr><td>P6</td><td>Left Hip</td></tr>
65 + <tr><td>P7</td><td>Right Ankle</td></tr>
66 + <tr><td>P8</td><td>Right Knee</td></tr>
67 + <tr><td>P10</td><td>Right Hip</td></tr>
68 + </table>
69 + <span style="margin-top:0.4rem;">Table 1.</span>
70 + </div>
71 + </div>
72 + </div>
73 +
74 + <!-- Step 2 -->
75 + <div class="asm-step">
76 + <div class="asm-step-header">
77 + <div class="asm-step-name">Autonomous — Configure Bot Board II Jumpers</div>
78 + <div class="asm-step-num">Step 2 / 10</div>
79 + </div>
80 + <div class="asm-step-body">
81 + <div class="asm-step-text">
82 + <p>Set the Bot Board II jumpers per Table 2. The VS to AX0 jumper enables the program to monitor servo battery voltage — when the battery is low the robot can beep a warning. Refer to Figure 2 for the jumper layout.</p>
83 + </div>
84 + <div class="asm-step-figure" style="flex: 0 1 auto;">
85 + <table class="ref-table" style="width:auto; margin-bottom:0.5rem;">
86 + <tr><th colspan="2">Bot Board II Jumper Settings (Table 2)</th></tr>
87 + <tr><td>Enable</td><td>A, B, and C buttons</td></tr>
88 + <tr><td>5V</td><td>I/O Group 0–3</td></tr>
89 + <tr><td>VS</td><td>I/O Groups 4–7 and 8–11</td></tr>
90 + <tr><td>Enable</td><td>SPKEN (Speaker Enable)</td></tr>
91 + <tr><td>Enable</td><td>VS (Servo Voltage) to AX0 (P16)</td></tr>
92 + </table>
93 + <span>Table 2.</span>
94 + </div>
95 + </div>
96 + <div class="asm-fullwidth">
97 + <p style="font-weight:bold; margin-bottom:0.4rem;">Figure 2 — Jumper diagram</p>
98 + <img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/autobrat.gif" style="max-width:100%; border:1px solid #ccc; border-radius:4px;">
99 + </div>
100 + </div>
101 +
102 + <!-- Step 3 -->
103 + <div class="asm-step">
104 + <div class="asm-step-header">
105 + <div class="asm-step-name">Autonomous — Find Servo Offsets</div>
106 + <div class="asm-step-num">Step 3 / 10</div>
107 + </div>
108 + <div class="asm-step-body">
109 + <div class="asm-step-text">
110 + <p>Download and install BASIC Micro Studio. Download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratosf3.zip">BRAT Servo Offset Finder Program v3</a>, load it into the IDE, and program the Atom Pro. Then use the buttons to find offsets:</p>
111 + <ul style="margin-top:0.5rem; padding-left:1.2rem;">
112 + <li><b>A</b> — decrease servo offset by 5µs</li>
113 + <li><b>C</b> — increase servo offset by 5µs</li>
114 + <li><b>B</b> — change which servo is being adjusted, and save offsets (order shown in Figure 3)</li>
115 + </ul>
116 + <p>If the Speaker is enabled, pressing B plays a tone that rises in pitch as you cycle through servos, and drops to a longer tone when returning to Start.</p>
117 + </div>
118 + <div class="asm-step-figure">
119 + <img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratosf3.jpg">
120 + <span>Figure 3 — Servo offset finder sequence.</span>
121 + </div>
122 + </div>
123 + </div>
124 +
125 + <!-- Step 4 -->
126 + <div class="asm-step">
127 + <div class="asm-step-header">
128 + <div class="asm-step-name">Autonomous — Calibrate Robot to Neutral Position</div>
129 + <div class="asm-step-num">Step 4 / 10</div>
130 + </div>
131 + <div class="asm-step-body">
132 + <div class="asm-step-text">
133 + <p>Place the robot as close to neutral as possible and turn it on. It should hold the neutral position resembling Figures 4-1 through 4-3. If any joint is off by more than 15°, remove the servo horn, rotate to align, and reattach. Use the A, B, and C buttons to fine-tune.</p>
134 + <p>Note: HS-422 hip servos may oscillate when the robot is lifted off the ground — this is normal and minimal when walking. Higher voltage makes oscillations worse. Higher-power servos (HS-475, HS-485, HS-645) do not exhibit this.</p>
135 + <p><span class="asm-warning">After adjusting all servos to match Figures 4-1 through 4-3, pressing B saves the offset values to the Atom Pro's EEPROM.</span></p>
136 + </div>
137 + <div class="asm-figures">
138 + <div class="asm-step-figure">
139 + <img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/brat10.jpg">
140 + <span>Figure 4-1 (front view).</span>
141 + </div>
142 + <div class="asm-step-figure">
143 + <img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/brat07.jpg">
144 + <span>Figure 4-2 (side view).</span>
145 + </div>
146 + <div class="asm-step-figure">
147 + <img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/brat04.jpg">
148 + <span>Figure 4-3 (rear view).</span>
149 + </div>
150 + </div>
151 + </div>
152 + </div>
153 +
154 + <!-- Step 5 -->
155 + <div class="asm-step">
156 + <div class="asm-step-header">
157 + <div class="asm-step-name">Autonomous — Load Basic Walk Code</div>
158 + <div class="asm-step-num">Step 5 / 10</div>
159 + </div>
160 + <div class="asm-step-body">
161 + <div class="asm-step-text">
162 + <p>Download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat1.zip">BRAT Autonomous Walk Code</a>, load it into the IDE, and program your BRAT.</p>
163 + <p>The BRAT will now walk autonomously following this sequence: walk × 3, turn, long-stride × 2, kick, turn, stop. To customise behavior, modify the code between the labels "main" and "move", or create new sequences following the format below the "move" label.</p>
164 + </div>
165 + </div>
166 + </div>
167 +
168 + <!-- Step 6 -->
169 + <div class="asm-step">
170 + <div class="asm-step-header">
171 + <div class="asm-step-name">Autonomous — Mount &amp; Connect GP2D12 Sensor</div>
172 + <div class="asm-step-num">Step 6 / 10</div>
173 + </div>
174 + <div class="asm-step-body">
175 + <div class="asm-step-text">
176 + <p>Use double-sided tape to attach the GP2D12 sensor to the BRAT's head area, facing the front. Exact position is not critical. Plug the sensor into the channel shown in Table 6.</p>
177 + <table class="ref-table" style="width:auto; margin-top:0.5rem;">
178 + <tr><th>Bot Board I/O</th><th>Connection</th></tr>
179 + <tr><td>P19 (AX3)</td><td>GP2D12 Sensor</td></tr>
180 + </table>
181 + <p style="font-size:11px; color:#666; margin-top:0.3rem;">Table 6.</p>
182 + </div>
183 + <div class="asm-step-figure">
184 + <img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratsens.jpg">
185 + <span>Figure 6 — GP2D12 sensor mounted.</span>
186 + </div>
187 + </div>
188 + </div>
189 +
190 + <!-- Step 7 -->
191 + <div class="asm-step">
192 + <div class="asm-step-header">
193 + <div class="asm-step-name">Autonomous — Load GP2D12 Obstacle Avoidance Code</div>
194 + <div class="asm-step-num">Step 7 / 10</div>
195 + </div>
196 + <div class="asm-step-body">
197 + <div class="asm-step-text">
198 + <p>Download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat2.zip">BRAT Autonomous GP2D12 Code</a>, load it into the IDE, and program your BRAT.</p>
199 + <p>The BRAT can now roam without bumping into obstacles. The sensor is read before each step. A short low beep means nothing is detected; the beep rises in pitch as objects get closer. At ~8" the robot backs up one step, turns left two steps, then continues. A looping counter periodically puts the robot into a resting position. LEDs illuminate based on the current command.</p>
200 + <p>Videos: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/avoid01.mpg">Avoiding obstacle</a> · <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/break01.mpg">Taking a break</a> · <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/walkaway.mpg">Proximity beeps</a></p>
201 + </div>
202 + </div>
203 + </div>
204 +
205 + <!-- Step 8 -->
206 + <div class="asm-step">
207 + <div class="asm-step-header">
208 + <div class="asm-step-name">Autonomous — Mount &amp; Connect Accelerometer</div>
209 + <div class="asm-step-num">Step 8 / 10</div>
210 + </div>
211 + <div class="asm-step-body">
212 + <div class="asm-step-text">
213 + <p>Use double-sided tape to attach the accelerometer to the BRAT's head area. <span class="asm-warning">Axis orientation is critical — follow the orientation shown in Figure 8 exactly.</span> Plug the sensor into the channels shown in Table 8.</p>
214 + <table class="ref-table" style="width:auto; margin-top:0.5rem;">
215 + <tr><th>Bot Board I/O</th><th>Connection</th></tr>
216 + <tr><td>P17 (AX1)</td><td>Accelerometer Y Axis (front-to-back tilt)</td></tr>
217 + <tr><td>P18 (AX2)</td><td>Accelerometer X Axis (side-to-side tilt)</td></tr>
218 + </table>
219 + <p style="font-size:11px; color:#666; margin-top:0.3rem;">Table 8.</p>
220 + </div>
221 + <div class="asm-step-figure">
222 + <img src="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/bratacc.jpg">
223 + <span>Figure 8 — Accelerometer orientation.</span>
224 + </div>
225 + </div>
226 + </div>
227 +
228 + <!-- Step 9 -->
229 + <div class="asm-step">
230 + <div class="asm-step-header">
231 + <div class="asm-step-name">Autonomous — Load 1-Axis Accelerometer Code</div>
232 + <div class="asm-step-num">Step 9 / 10</div>
233 + </div>
234 + <div class="asm-step-body">
235 + <div class="asm-step-text">
236 + <p>Download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat3.zip">BRAT Autonomous 1-Axis Accelerometer Code</a>, load it into the IDE, and program your BRAT.</p>
237 + <p>This program uses only the Y Axis to detect front-to-back tilt — the BRAT can tell when it has fallen forward or backward and get back up. The X Axis will be incorporated in Step 10.</p>
238 + <p>Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/getup01.mpg">Getting up front and back</a></p>
239 + </div>
240 + </div>
241 + </div>
242 +
243 + <!-- Step 10 -->
244 + <div class="asm-step">
245 + <div class="asm-step-header">
246 + <div class="asm-step-name">Autonomous — Load 2-Axis Accelerometer Code</div>
247 + <div class="asm-step-num">Step 10 / 10</div>
248 + </div>
249 + <div class="asm-step-body">
250 + <div class="asm-step-text">
251 + <p>Download the <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/abrat4.zip">BRAT Autonomous 2-Axis Accelerometer Code</a>, load it into the IDE, and program your BRAT.</p>
252 + <p>This version adds the X Axis for side-to-side tilt detection — if the BRAT falls onto its side it will roll over to get back up. It also includes an improved "get up from back" routine for robots with heavy cabling, and a "startled" behaviour: if the BRAT is resting and the GP2D12 suddenly detects an object, it will lean back and beep.</p>
253 + <p>Video: <a href="https://wiki.lynxmotion.com/info/wiki/lynxmotion/download/servo-erector-set-robots-kits/ses-v1-robots/ses-v1-bipeds/brat-biped-autonomous/WebHome/getup02.mpg">Getting up front and side</a></p>
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