This is a guest post by Olger Groen. If you would like to write for ExtremeCircuits, then drop us an email via contact form or simply comment. A long time ago when a parallel printer port was the ...
The circuit was aimed to produce an electronic selector for ten alternative sources with the means of showing the result in a 7-segment display being driven by relays. 4511 – a BCD to 7-segment ...
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