#Push button on off switch driver

PIN 7: It is the discharge pin that is connected to the collector of the BJT. PIN 6: It is connected to the non-inverting (+) input of the comparator circuit whose output is connected to the reset pin of the flip-flop. Generally, in most of the 555 timer circuits, we can see that this pin is connected to a capacitor for getting a stable reference voltage. If we want to change the reference voltage, we can apply external voltage via this pin. PIN 5: It is the control pin that is connected to the 2/3 value of the voltage divider and inverting input(-) of the comparator. This is the reason, we see in most 555 circuits it is connected to Vcc. By connecting this pin to the ground, we can reset this IC. PIN 4: It is the reset pin that is connected to the reset pin of the flip-flop.

#Push button on off switch driver

PIN 3: It is the output of the IC which is connected via the output driver circuit to the output of a flip-flop.

PIN 2: It is the trigger pin of the IC which is connected to the inverting input(-) of the comparator. The non-inverting input(+) of one comparator is connected to the 1/3 output of the voltage divider and the inverting input(-) of the other comparator is connected to the 2/3 output of the voltage divider. These resistors create a voltage divider circuit with the value of 1/3 and 2/3 of the supply voltage as pin 1 is ground and pin 8 is Vcc. PIN 1 and PIN 8: These are connected between the ground and Vcc with three 5kΩ resistors. The internal circuit of the 555-timer is discussed below: It’s the oldest piece of technology and thus you can rely on it blindly and best of all, it’s affordable. When it comes to designing timer circuits, the very first thing which comes in our mind is the 555 timer IC. The components required to build a simple push on push off switch are listed below. Components Required for 555 Timer Latch Circuit We will design the circuit on a breadboard and with the help of a push-button, we will demonstrate its working. In this tutorial, we will learn how we can use a 555 timer IC as a switch in combination with some complementary components. We can use this circuit in combination with digital development boards like Arduino for designing circuits where we need to activate the microcontroller by detecting a small pulse (like a motion sensor). This is the type of button that holds its state i.e. on the first press, it switches on the load, and on the second press, it switches off the load. If you are a hobbyist or have keen interest in electronics circuits, you must be familiar with 555 timer IC and its three popular circuits - Monostable multivibrator, Astable multivibrator, and Bistable multivibrator. Guess what, we can even use this IC as a switch.