Found in an old Radio Electronics, this circuit applies to frequency meters for frequencies up to 100 MHz. The input impedance is in the order of 1 M ohm.
The presented circuit emits signals in the FM band, which can be picked up from a distance of a...
The TDA7053 consists of a class B stereo amplifier, formed by two amplifiers connected in bridge...
This circuit activates a piezoelectric buzzer with an oscillator at the end of the programmed...