This oscillator provides a 1 MHz rectangular signal determined by the capacitors used. The circuit must be powered by a voltage of 5 V. The maximum frequency depends on the logic used.
This circuit controls the brightness of a 12 V powered car courtesy light. The transistor can also...
This circuit is from an American publication in 1998. The integrated circuit used is not very easy...
This circuit can turn-on (only) a load (relay or lamp) when S1 is pressed. The circuit can be used as...