Multiplexed BCD Driver (CB20908E)

This circuit was found in an Electronics Now from the 80's. The circuit is designed for 3-digit displays. The circuit is TTL.

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Varicap Modulated FM Oscillator (CB13348E)
This circuit can serve as the basis for a small FM transmitter with varicap. We found it in a...
Small experimental amplifier (CB23835E)
This circuit was obtained from the Radio Electronics magazine of August 1962. It is a tandem...
10 A NC Relay Shield (CB6015E)
This 10 A solid state relay was found in a 1980s documentation. It can work as a shield and...