This circuit was obtained in a 1970 engineering documentation. The operational is the 741, but other operational ones can be used. The power supply must be symmetrical.
This micro FM transmitter or wireless FM microphone makes use of a ceramic capsule as a microphone or...
The voltage of 30 V indicated in this project, shown in the figure depends on the diac used. It...
This circuit is intended to drive bistable relays and can be used as a shield for...