Found in a 1980s American documentation, this circuit appears with variations elsewhere in this section. The circuit activates a relay according to the supply voltage.
This circuit uses components of the time. We found it in a 1968 US documentation. The delay is 100 ns...
This circuit compresses the dynamic range (amplitudes) of an audio signal. The circuit is passive and...
This circuit is from an Argentine publication from 1973. It provides a signal to an amplifier from...