Micro metronome (CB20743E)

This simple CMOS metronome circuit can be mounted in a small box, providing both sound and light sources.

High Voltage Capacitor Test (CB16478E)
In the 110 V network, capacitors of 200 V or more and in the 220 V network, capacitors of 400 V or...
Amplifier OC30 (CB18557E)
The OC30 power transistor is an old type of germanium from the 60s. This amplifier, using this...
Low noise instrumentation amplifier (CB20988E)
Found in Maxim documentation from the 90s, this circuit makes use of components from the period. The...