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LED VOLTMETER

I recently make a variable power supply with LM 317 ( I will post it later). so now need a voltmeter that can tell me the out put voltage and fixed it with the power supply. I goto shops to find a small voltmeter. but I cant find me so I think to made my own volt meter. Now the challenge is how to output the result. then i have a good idea with leds. I search in internet about make a voltmeter and collect information and make my own voltmeter. This voltmeter I have made is depend on zener dioads. I use 3.6v, 6.3v, 9v, 12v, 15v and 18 v. You can customize it and make it read any voltage!.”

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