David L NorrisMapping out the needed signals for a replacement PB121 board. This should be a complete diagram of the proposed interconnections. I have shared this Block Diagram via Google Drive using Draw.io.
PB121 Block Diagram v1
A project log for PB121
A project to replace the Uniden PB121, PB112 boards with modern counterparts to revive dead radios and overcome mcu limitations.
Discussions
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