Do you wish to have a smaller and powerful mini 3 digital display, which is act as a digital voltmeter module?

Well, instead of seeking it on the market, why don’t you spare couple of hours and develop one for your own use?

This project is very simple and it’s requiring a very low budget. Although it is a voltmeter, but it also can has a general purpose digital IO pins. Thus, it’s enable you to use it to read a digital sensor or display the value.

It’s easy to get the digital voltmeter modules (DVM-modules) in the nearest local electronic store. Since the instruments are to be placed into any equipment, you will have the problem, where there is no mention of that on the box! As a result, you can’t even power the module from the same power that you would like to measure.

For the above matter, you will find that the best solution here is to take a small microcontroller with a build-in ADC (analog to digital converter) and add a display on it!

Remember that it is important for the flicker free display, so it can refresh the LEDs frequently and you must keep the code as small as possible!