ZeroBot - "Off-Road" Version -- Raspberry Pi Zero FPV Robot

prusaprinters

<p>This is a remix of Max Kern's great <a href="https://www.prusaprinters.org/prints/8412-zerobot-raspberry-pi-zero-fpv-robot">ZeroBot</a> robot (more on <a href="https://hackaday.io/project/25092-zerobot-raspberry-pi-zero-fpv-robot">Hackaday.io</a>), with the following changes:</p><ul><li>Headlights</li><li>Grooved tires</li><li>Charging port</li><li>Front panel holder.</li></ul><p>Also, thank you Kelly Jordan for the inspiration with your <a href="https://www.thingiverse.com/thing:2227184">aggressive tank tread</a>.</p><p>Some extra parts are needed:</p><ul><li>2 BC337 transistors</li><li>2 1.5K resistors</li><li>2 22Ω resistor (You may need to adjust this resistor's value, to provide enough current to drive your LEDs)</li><li>2 cheap flashlights (<a href="https://www.aliexpress.com/item/Mini-Pocket-Flashlights-Carabina-Keychain-LED-Torch-Lamp-Light-Flashlight-For-Outdoor-Camping-Hiking-Emergency-Survival/32813588277.html?spm=a2g0s.8937460.0.0.NhYiw6">like this one</a>), to source the LED and lens.</li><li>1 Kcd11-101 switch (<a href="https://www.aliexpress.com/wholesale?catId=0&amp;initiative_id=SB_20170721084703&amp;SearchText=Kcd11-101">easy to find</a>)</li><li>4 M3 x 12mm bolts</li><li>4 M3 nuts</li></ul><h5>Update</h5><p>Created a shrunk down raspbian image, ready to use, that may fit even a 2GB sdcard. (<a href="https://debug.net.br/ZeroBotOffroad.7z">download here</a>)<br>This image uses Max.K's latest Zerobot Pro control interface changes. To use it, just connect to the "zerobot" WiFi network using the password "zerobot1" then browse to this address: <a href="http://zerobot/">http://zerobot/</a> or <a href="http://10.0.0.1/">http://10.0.0.1/</a></p><h3>&nbsp;</h3><h3>Print Settings</h3><p><strong>Rafts: </strong>Doesn't Matter</p><p><strong>Supports: </strong>Yes</p><p><strong>Resolution: </strong>0.2mm</p><p><strong>Notes:</strong></p><p>First read the directions on <a href="https://www.thingiverse.com/thing:2352440">ZeroBot</a>'s page.</p><p>I'm using Slic3r (Prusa Edition) with this settings:</p><ul><li>Perimeters: 3</li><li>Solid Layers: 3</li><li>Infill: 20%</li><li>Overhang Threshhold: 16º</li></ul><p>If you need, use the extra brim files with the upper or lower shell for easier print (Slic3r):</p><ul><li>Add the upper or lower shell</li><li>Click Settings -&gt; Load Part, and select the corresponding brim file.</li><li>Click OK</li></ul><p>&nbsp;</p><h3>Post-Printing</h3><p>First look at ZeroBot's <a href="https://hackaday.io/project/25092-zerobot-raspberry-pi-zero-fpv-robot">Hackaday.io</a> page, for the basic parts and instructions.</p><p><strong>Headlight assembly</strong></p><p>For this you need to retrieve the LED and lens from the flashlights.</p><p>You can adapt the headlight part to work with other flashlight sizes by altering some variables in the "CustomizationTable" spreadsheet inside the FreeCAD source file.</p><p>It's not possible to drive this LEDs directly from the raspberry pi GPIO ports, so you need to assemble this simple circuit:</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/95396/rich_content/876762e0-7c29-4c62-ba62-0a206d2d2318/headlight.png#%7B%22uuid%22%3A%22403e10ce-150b-4ca3-82cc-8300b7d718e2%22%2C%22w%22%3A1308%2C%22h%22%3A1347%7D"></figure><p>Start by gluing the 22Ω resistor and the transistor to the headlight part, then solder dead bug style like this:</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/95396/rich_content/f8379330-e296-460a-a859-0c90f21c5629/20170720_173106.jpg#%7B%22uuid%22%3A%227116b137-301f-4402-a4a3-e0a2b737130a%22%2C%22w%22%3A5312%2C%22h%22%3A2988%7D"></figure><p><strong>22Ω resistor and transistor glued to the headlight part.</strong></p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/95396/rich_content/0aba70ea-153a-4421-a568-ca10ef16c40c/20170720_175418.jpg#%7B%22uuid%22%3A%225545d854-6fcb-45a4-b5b4-fbc08db35522%22%2C%22w%22%3A5312%2C%22h%22%3A2988%7D"></figure><p><strong>LED inserted and soldered (check LED orientation)</strong></p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/95396/rich_content/9128f043-9fe4-4a69-a0dd-76879a2cada8/20170720_181035.jpg#%7B%22uuid%22%3A%2243691000-f713-4c8a-9916-3c5b67453291%22%2C%22w%22%3A5312%2C%22h%22%3A2988%7D"></figure><p><strong>1.5K resistor and cables soldered red=5v brown=GND blue=GPIO</strong></p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/95396/rich_content/3eb49740-3dca-4752-92a8-a1405a07e0e3/20170720_181559.jpg#%7B%22uuid%22%3A%229a380f2d-3319-4ffd-8f6d-3424c3bd203e%22%2C%22w%22%3A5312%2C%22h%22%3A2988%7D"></figure><p><strong>Finish with heat-shrink tubing and some more glue</strong></p><p><strong>Software changes</strong></p><p>Replace the original app.js and Touch.html (~/Desktop/touchUI) with the files in touchUI.zip.</p><p>Optional: add the following line to /boot/config.txt to disable the camera LED.<br>disable_camera_led=1</p><p>Now you can turn the lights on and off by pressing the switch on the lower right corner:</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/95396/rich_content/65a95b33-d42a-4855-9e42-350987024e2e/touchui.png#%7B%22uuid%22%3A%22f0eca9f6-88e7-4c38-aad1-d3a27c12e652%22%2C%22w%22%3A650%2C%22h%22%3A540%7D"></figure><p><strong>On/Off Switch</strong></p><p>Just plug the switch, no glue needed.</p><p>Depending on your printer tolerances, you may need to adjust the hole size. You can do this by altering the "ON/OFF Switch Hole - Sketch" on the FreeCAD souce file:</p><figure class="image"><img src="https://media.prusaprinters.org/media/prints/95396/rich_content/b0571bb8-9bbf-4040-9978-77824ff87f32/switchhole.png#%7B%22uuid%22%3A%22403f3621-7b1d-4399-af26-eda0dc609c7f%22%2C%22w%22%3A623%2C%22h%22%3A481%7D"></figure><p>Category: Robotics</p>