Bistable multivibrator

Bipolar ip-ops are controlled by two triggers and provide two opposite output signals. These circuits are also used to store data. This example contains two push buttons as trigger. By pressing the right button, the yellow LED lights up and the red LED turns off. By pressing the left button, the red LED lights up and the yellow LED turns off. Each trigger controls both output signals exactly in the opposite way. These circuits are also called ip-op. When no push button is pressed, the LED switched on at last, remains on. This event is stored until a a new pulse triggers the circuit. These R/S ip-op circuits (Reset/Set) are mainly used in automation applications. Their main advantage compared to other circuits is that the trigger signal does not need to be present continuously. A small impulse is enough to open the garage door. The door opens until the stop position is reached and the door automatically stops at the desired position. The door remains in that state as long as a new impulse is sent.