Group4 CheckpointA KiCad 4-20-26

Electronic Test Bench (ETB)

A Raspberry Pi 4 bench instrument built for ECSE 2920 (Design Methodology) at the University of Georgia, Spring 2026. It includes a function generator, ohmmeter, voltmeter, DC voltage reference, and frequency meter, all controlled with a rotary encoder and a 20×4 LCD.

This was a five-person team project. Original course repository: Herring-UGAECSE-2920-S26/Group-4

My role

• Designed the ohmmeter and the square-wave generator
• Did the system integration for Checkpoint B and Checkpoint A-
• Built the sine-wave generator and frequency meter for the final checkpoint
• Updated the schematics and PCB for the final checkpoint

Instruments

The user interface is a menu state machine driven entirely by a KY-040 rotary encoder (turn to move, press to select).

Results

Measured during Checkpoint B testing.

Repository layout

electronic-test-bench/
├── README.md
├── software/
│   ├── checkA_main.py
│   ├── adc.py
│   ├── digipot_dual.py
│   ├── freq_measure.py
│   ├── inputs.py
│   ├── lcd.py
│   └── requirements.txt
├── hardware/
│   ├── kicad/              # .kicad_pro, .kicad_sch, .kicad_pcb
│   └── schematics/         # PDF export of each subsystem
├── data/                   # calibration and test measurements (.csv)
└── docs/
    ├── ETB_Technical_Documentation.pdf
    └── images/

Running it

Requires a Raspberry Pi 4 with Python 3, SPI and I²C enabled.

sudo pigpiod
pip install -r software/requirements.txt
python3 software/checkA_main.py

Documentation

Full design writeup: docs/ETB_Technical_Documentation.pdf

User manual: docs/User Manual.pdf

Team

Avery Dedjoe, Allan Gramajo, Justin Park, Samuel Baker, Jakob Braski