Found in a 1993 Electronics Experimenter Handbook, this circuit uses a multimeter to measure capacitance. The circuit is powered by 12 V.
This amplifier for small cassette tape players was found in an English documentation from 1969. The...
This circuit is intended to trigger a TTL door or flip-flip from a signal coming from an SCR....
We find this circuit in a 1980s documentation. The circuit can be applied to modern operators with...