Mystery comms & logic board

A project log for Avionics + mil-spec teardowns

Reverse-engineering (mostly-)cheap eBay finds

Don Straney • 12/28/2025 at 00:12•0 Comments

This large assembly only contains 3 MIL-STD-1553 serial channels, plus some counters. Surprising how much board space this used to take up! https://www.eevblog.com/forum/projects/avionics-teardown-engine-controller-boards/msg6143931/#msg6143931

Previous log

IBM Federal Systems Division Oscillator/Audio Module

11/01/2025 at 17:14 • 0 comments

Next log

Hughes Aircraft digital logic board from the 70's

01/26/2026 at 03:27 • 0 comments

Discussions