The OD-PT74 is an open-source RP2040-based 74xx TTL and CMOS logic IC tester designed for hobbyists, repair technicians and electronics enthusiasts. It supports 14, 16 and 20-pin DIP devices and features an intuitive OLED display with rotary encoder navigation. Complete firmware, hardware source, enclosure files and build documentation are available on GitHub.

Features

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Supports 14, 16 and 20-pin DIP logic ICs

Supports both TTL and CMOS logic families

RP2040 microcontroller

OLED display

Rotary encoder user interface

Quick, Full and Soak test modes

Open-source firmware

KiCad hardware source included

FreeCAD enclosure source included

Complete build documentation

GitHub Repository

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GitHub Repository Contents:

Firmware source

Hardware source (KiCad)

Gerber files

BOM files

Pick & Place files

FreeCAD enclosure source

STL files

3MF files

Build Guide

Front Panel Wiring Guide

Hardware Design Guide

Troubleshooting Guide

PCBWay Files

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This Shared Project provides the production-ready manufacturing files for both PCBs used by the OD-PT74:

• Base Board

• Top Board

Each board includes:

• Gerber files

• Bill of Materials (BOM)

• Pick & Place files

GitHub

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The complete project, including firmware, documentation, CAD files and future updates, is available on GitHub:

https://github.com/LS120nz/OD-PT74-IC-Tester

Please visit the GitHub repository for firmware updates, documentation and future hardware revisions.

Notes

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This project is fully open source.

Complete documentation, firmware updates and future revisions will always be available from the GitHub repository.

This project is released as open-source hardware. Contributions, improvements and additional device support are welcome through the GitHub repository.