LED beacon (CB21017E)

This circuit was taken from a popular 90's Electronics. The LDR is mounted next to the LED to feed back the circuit.

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Light Control (CB22101E)
This circuit was found in documentation from the 90's. The load can be a relay and the sensor an...
Voltage tripler (MSB032)
The presented circuit is used in Power supply to increase the voltage output. The voltage output...
Tape preamplifier (CB7310E)
Found in a 1967 Electronics World, this preamplifier uses an integrated circuit from that time,...