The resistors R1 and R2 consist of 8 220 ohms x 2 W resistors connected in parallel. The dissipation must be higher for high transmitter power. The indicator can be the multimeter.
This circuit includes an AD converter for interfacing with a microprocessor and can be used as a...
This inverter bistable buffer circuit was obtained in a Hands On of the 90's. Next to the circuit we...
This signal injector circuit, an astable multivibrator, was found in a 1971 magazine. The circuit can...