Expandable Electronic Counter

In this project, learn how to build a counter that will count up the display by one digit every time it receives a signal. The display is expandable so you can add more displays if you need to.

The circuit will count up when ever you supply a high level signal to pin 2 of the 555 timer this input could be from another circuit or a push button.

If you want to add more displays to the counter all you need to do is connect the clock signal from the previous display driver (pin 5) and connect it to the click input (pin 1) on the next display driver. I have only tested up to 3 displays and it worked fine but I'm sure that it can be expanded much more than this.

I have included a schematic below for you to use. I built mine on a breadboard but you could build it on a piece of perfboard or even a PCB.

Once you have built your circuit all you need to do is apply a high signal to the input and the counter will count up the display by one every time it revives a signal.

Acknowledgement

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