This shield circuit can be used in several applications that involve a feedback signal. The circuit is from American documentation from the 80s and the transistors are according to the loads driven.
Timings of up to 10 hours, depending on the capacitor used, can be obtained with this circuit that...
This unit is ideal for powering car radios, tape players or car CD and DVD players from the power...
This three-transistor circuit can control 3 V relays or servos from 17 MHz modulated transmitters. The...