Full wave rectifier filter (CB7582E)

This circuit was found in a Popular Electronics from the 90s. The power source must be symmetrical and the operational amplifiers can be 741.

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Modulated Light Receiver (CB6160E)
This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and...
Current shield RS232 (CB8075E)
Found in a Popular Electronics from the 9s, this circuit has output for RS-232 interfaces and current...
Two Terminal Current Regulator (CB5280E)
This regulator was found in a 2005 Linear Technology component manual. It is based on the LT1635...