This circuit with a dual power supply generates sinusoidal, triangular and rectangular signals. We found it in the magazine Electronics Now of January 1996. The frequency goes up to a few megahertz.
This circuit produces a warning signal with the programmed current that can reach 4 A. The circuit is...
This circuit open and close the relay in intervals adjusted by the potentiometers. The capacitors...
The range for this transmitter is up to 100 m. The signal can be received by any circuit tuned for the...