This circuit generates frequencies determined by R3 and C1. We found it in the Radio Electronics magazine of May 1988. The power supply must be symmetrical.
In the figure we present a circuit of a microphone signal conditioner using the SSM2167 integrated...
This transmitter emits signals in the FM range, reaching a few meters away. The modulation...
This circuit was obtained in an English publication of 1993. It is an amplifier for...