Optical fiber receiver (CB9736E)

This high sensitivity receiver of 30 nW was found in documentation from the 1980s. Integrated circuits are from that time.

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ELF Monitor (CB21055E)
This circuit monitors extra-low frequency (ELF) fields. We found it in an American documentation from the...
Controlled Oscillator (CB12682E)
We can use any type of resistive transducer with central resistance in the range of 10 k ohms to 1...
Triac Double Dimmer (CB16915E)
This circuit controls two lamps so that when one increases in brightness the other decreases. The...