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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MW Receiver ZN414 (CB4547E)
This circuit was obtained from an English magazine from 1985. The N414 is a complete, not easy to...
Touch Alarm (CB6450E)
Found on Popular Electronics from 1969, this circuit can be implemented with components that are...
Transformer coupled AF amplifier (CB21547E)
This circuit is from a book of transistors from 1954. The transistors are from the time and the...