Minitankpi

Minitankpi
Participants	User:buzz
Skills	Raspberry pi, 3D Printing, Mechanics
Status	In progress
Niche	Unknown
Purpose	Unknown
Tool	No
Location
Cost
Tool category

Minitankpi

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I loved the Zerobot Pro Tank so much that i've printed one.

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• https://thingiverse.datux.nl/thing:4041063

Build log

Had some videos i never linked from this page :

• https://www.youtube.com/watch?v=EL4zAS83QmI
• https://www.youtube.com/watch?v=0uRZylncWfc

--buZz (talk) 15:07, 27 December 2020 (CET)

Wrote some code!

For the Teensy ; https://gist.github.com/buzztiaan/7a10806c974db5884cf62acdf7cc2849

For the Pi ; https://gist.github.com/buzztiaan/dc600e571a6332caae1f5952dfbd046b

This now works well, and i can drive around the hackerspace remotely :D

--buZz (talk) 12:04, 27 February 2020 (CET)

Received the motors, so built everything up.

--buZz (talk) 19:07, 20 February 2020 (CET)

Vitamins

• 2x https://www.ebay.nl/itm/DC3V-6V-DC-Geared-Motor-TT-For-Robot-Smart-Car-Chassis-DIY-Anti-interferen/122811556981
• 1x https://www.ebay.nl/itm/2PCS-DRV8833-2-Channel-DC-Motor-Driver-Module-1-5A-for-Arduino/402052316726

• Raspberry Pi Zero W
• https://thepihut.com/products/zerocam-fisheye-camera-for-raspberry-pi-zero
• 16GB microSD

• Teensy 2.0 board
• MPU6050 breakout board (i2c)
• HMC5883 breakout board (i2c)

• 2x White 8000mcd LEDs (TODO)
• (some amount) WS2812 or other leds (TODO)
• remove unwanted leds (TODO)

• 2x 18650 in parallel config
• 2x DCDC boost converters , one 5V for pi & teensy , one 6.2v for motors

• simple microUSB 1A charger board

Setup

Planned software setup ;

• https://www.ros.org/
• https://github.com/alansrobotlab/rospberrypi - Everything you need to set up ROS Melodic on the Raspberry Pi Zero / W (gives errors on latest stretch images)
• https://github.com/SamSpaulding/ros_raspberry_pi_zero - seems to compile most of it from source, viable option?

• https://github.com/richardghirst/PiBits/tree/master/MPU6050-Pi-Demo

Something for sending 4 PWM signals to the DRV8833 (arduino pro mini? teensy? bit overkill .. )

• https://oscarliang.com/raspberry-pi-and-arduino-connected-serial-gpio/

Or connect the DRV8833 to Pi directly?

• https://forum.pololu.com/t/drv8833-motor-runs-unwantedly-upon-battery-connection/8155

Beyond camera and 6dof no other sensors for now. Some kind of external brain ros instance aswell? LXC?

• http://www.ti.com/lit/ds/symlink/drv8833.pdf