This circuit was taken from old American documentation. With it, it is possible to generate pulses like a Schmitt trigger, but using a tunnel diode.
Found in a 90s Popular Electronics, this circuit uses a MAR-X to amplify signals up to 2 GHz. The...
The basis of this circuit is a CA3130 operational amplifier. The transistor can be BC548, and the...
This sound relay, Vox or acoustic switch has a bistable action triggering a relay when the...