This circuit was originally found in a Philips documentation from 1969. It is intended for sensing golf cart battery voltage. The circuit can be adapted for other types of battery vehicles.
This oscillator produces an audible signal on a piezoelectric transducer. The frequency is...
This circuit, from a 1998 documentation, allows to obtain more power for the radios and amplifiers of...
This medium wave radio must use a high impedance piezoelectric, crystal or magnetic phone and the...