.Amazing stash you have there. Like historically important stash ..
Here's some old photos of my old 25 chip module from a few years ago, now sold. Between us there's 6 surviving modules straight off, and I know of two others in the UK, so I wonder how many really are out there ?!?
When I showed this module to collectors the first question was always 'what do the letters mean?'. Simple. Back then integrated circuit density was extremely low, although early logic gate families did exist. It amazes me that early surface-mount style 'chips' were actually available to make this module possible. Each letter here probably represents a particular logic function, for example A=Decoder Driver, G=quad 2 input nand gate. You can almost work it out using the P1 schematics in the patents and the unpopulated PCB track image ...
module light sensors.jpg
ED 25 chip PCB not inc wire links.jpg
trimmer cap adjustmentcc.jpg
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