Found in a 80s American documentation, this circuit pulses a lamp for optical relay tests. The circuit can be modified to trigger a high brightness white LED.
This shield circuit allows recording of the signal from a serial output on a cassette recorder, with...
The model aircraft spark plug filaments operate with a low voltage of the order of 1.5 V. This...
This circuit, found in US documentation, can measure the power of transmitters up to 10 W, given...