Project video presentation:
CPU Cores, supported development boards:
- Samd21E18
- ESP32 DevkitC
- All STM32 Nucleo mini boards
- Atmega328 in Arduino nano
IO HEADERS:
- 2x stepper motor 28BYJ-48
- 2x buttons
- 3x servo
- 2x Touch buttons
- 4x I2C
- 1x UART
Sensors / displays:
- 2x opticall sensor
- GPS
- Ground color sensor
- Laser TOL distance meter
- Temperature, humidity, pressure
- Oled or 1602 LCD display
- Battery charging
- Speaker
Programming:
- Adafruit Circuitpython
- Microsoft Makecode
- Arduino IDE
Wheel
Constructed from 3pcs of PCB board detachable from chassis shield.
I am very proud on as I solve wheel locking on stepper motor.
I found 1.6mm screew and I fit in middle board.
Also middle board wheel is smaller to make rim for simple tire.
![](https://cdn.hackaday.io/images/9535221630007577413.jpg)
![](https://cdn.hackaday.io/images/6113661630007577645.jpg)
![](https://cdn.hackaday.io/images/9177001630007580573.jpg)
![](https://cdn.hackaday.io/images/9107461630007580636.jpg)
![](https://cdn.hackaday.io/images/1276141630007580819.jpg)
SWOT analysis
Strengths:
- no competition
- simple as possible
- cheap
- universal design
- high movement precision thanks to stepper motor
- circuitpython
- micropython
- arduino core
Weaknesses:
- my programing knowledge is basic
Opportunities:
- programming learning toy
- simple, ideal as kit
Threats:
- please write in comments, I am blinded by my enthusiasm
Version without wheels (If you have full desk old wheels from bad prototypes :D )
![](https://cdn.hackaday.io/images/5612071630007622195.jpg)
Incoming prototype for ESP32 with camera
![](https://cdn.hackaday.io/images/2499011630007644757.jpg)
Universal version, you can see touch buttons
![](https://cdn.hackaday.io/images/850781630007665128.jpg)
Closer look on stepper motor mount and LASER distance sensor
![](https://cdn.hackaday.io/images/2355801630007683047.jpg)
LEGO compatible holes
![](https://cdn.hackaday.io/images/1146211630007752467.jpg)