The hardware was kept simple and cost-efficient. All you need is the CybICS baseboard, a Raspberry Pi Zero 2 W and a 1602 display. For the physical process visualization on the PCB a few LEDs are used.
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The PCB can be ordered completly assembled at JLCPCB. The total cost for a testbed is around 50 euros. However, the minimum purchase of PCBs is 5 pieces when ordered from JLCPCB.
The hardware consists of three core components. Additionally, there is a 3D printable case, which makes desk usage easier (link).
| Component | Description |
|---|---|
| Base Board | Simulating the physical process |
| Raspberry Pi | Controlling the physical process |
| Display | HD44780 1602 LCD showing physical state |
| Item | Quantity | Description | Approx. Cost (EUR) | Notes |
|---|---|---|---|---|
| CybICS PCB | 1 | Custom PCB with STM32G070RBT6 | ~40 | Min. order 5 pieces from JLCPCB |
| Raspberry Pi Zero 2 W | 1 | 1GHz quad-core ARM Cortex-A53 | ~15 | Includes WiFi and Bluetooth |
| 1602 LCD Display | 1 | HD44780 compatible, I2C interface | ~3 | Blue or green backlight |
| MicroSD Card | 1 | 8GB or larger, Class 10 | ~5 | For Raspberry Pi OS |
| USB-C Cable | 1 | Power supply cable | ~3 | 5V/2A minimum |
| Pin Headers | 1 set | 2.54mm pitch headers for Raspberry Pi | ~2 | Usually included with RPi |
Total Estimated Cost: ~50-70 EUR per complete unit
| Item | Quantity | Description | Approx. Cost (EUR) | Notes |
|---|---|---|---|---|
| 3D Printed Case | 1 | Protective enclosure | ~5 | Filament + printing time |
| Stand/Base | 1 | Simple display stand | ~2 | See standSimple/ directory |
| USB Power Adapter | 1 | 5V/2.5A wall adapter | ~5 | If not using PC USB |
- JLCPCB: https://jlcpcb.com/ (Recommended - full assembly available)
- Upload Gerber files from
hardware/pcb/directory - Select assembly service (PCBA)
- Minimum order: 5 boards
- Lead time: ~2 weeks
- Upload Gerber files from
- Official Raspberry Pi Resellers: https://www.raspberrypi.com/products/
- Local electronics distributors (varies by country)
- Common suppliers: AliExpress, Amazon, local electronics shops
- Search for: "1602 LCD I2C" or "1602A LCD module"
- Any reputable brand (SanDisk, Samsung, Kingston)
- Minimum 8GB, Class 10 or better recommended
The hardware is designed for Raspberry Pi Zero 2 W but can work with:
- Raspberry Pi Zero W: Lower performance but compatible
- Raspberry Pi 3/4: Will not perfectly fit
The KiCad project files in hardware/pcb/ can be modified to:
- Add additional sensors or actuators
- Change LED colors or positions
- Modify STM32 pinout
- Add expansion connectors
- Use only 5V power supplies - higher voltages will damage components
- Do not connect/disconnect components while powered
- Ensure proper ESD (electrostatic discharge) precautions when handling PCB
- Keep away from water and conductive materials
- Do not modify PCB traces without proper knowledge
- PCB Design Files: See
hardware/pcb/directory - 3D Case Files: See
hardware/case/directory - Schematic PDF: Available in
hardware/pcb/directory - STM32 Firmware: See
software/stm32/directory - Assembly Guide: This document
For technical support, please open an issue on the GitHub repository.