AD to PC Converter (CB7455E)

Found in a Popular Electronics from the 90's, this circuit makes use of an integrated from the uncommon era today. The circuit serves as a reference.

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Digital control of relays 2 (CB23774E)
This circuit consists of a rearrangement of the previous circuit also using 4 relays. We found this...
Audio limiter (CB7966E)
This circuit limits the intensity of an audio signal from a control voltage. The circuit is from a...
Limiter with diodes (CB7513E)
This limiting circuit or Clipper was found in a 1977 documentation. The circuit uses only passive...