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 circuit was found in Electronics Now magazine and can be applied to any JFET. The circuit has high...
When this alarm is off current drained is very low, only about 60 µA. The circuit can be powered...
This circuit was published in an English magazine from 1977, but it can be easily assembled since...