This transmitter power meter was found in the March 1999 issue of Electronics Now magazine. The circuit uses an analog indicator and does not require a power supply.
This common transistor-based circuit provides power for 20 mA common white LEDs from a single 1.5...
This circuit for old cars with platinum ignition was found in Radio Electronics magazine from...
The receiver shown above was sent in by contributing reader Adriano Muniz Moura and is used for...