With this passive circuit it is possible to modulated in amplitude a low intensity RF signal. The circuit is from old American documentation and uses a germanium diode as its main component.
This small automotive NiCad battery charger uses only passive components and has the number of...
This circuit produces low power flashes in a LED. Frequency is adjusted by P1 and depends also on...
This is the traditional configuration of na Astable Multivibrator using two NPN ttransistor....