This circuit was found in a 90's Electronic Design. The circuit can be adapted to use modern components. The power supply is made with 5 V which allows its use as a shield sensor.
This experimental flip-flip changes its state by the command of two push-buttons. The state is...
The oscillator shown in the figure generates a 1 kHz tone that is reproduced on the speaker with...
This sensitive multi-circuit and component prover uses two transistors and has a switch position where...