Nope, but its fairly easy to explain. On the negative side of each LED is the negative lead from the power supply. On the positive side of each LED is a Zener Diode with a slightly different value decreasing from the green to red. So as you increase the voltage each zener reaches its breakdown voltage just before the next giving you a volt meter. Enjoy!
can you show us how to make this?
pprriimmoopro 6 months ago
can i do this but at a range something more like 0-400volts?
ConnorXV 10 months ago
Its especially nice because each LED has a variable region of intensity around the Zener threshold voltage, so the effect is a very smooth display.
madamerotten 1 year ago
Nope, but its fairly easy to explain. On the negative side of each LED is the negative lead from the power supply. On the positive side of each LED is a Zener Diode with a slightly different value decreasing from the green to red. So as you increase the voltage each zener reaches its breakdown voltage just before the next giving you a volt meter. Enjoy!
Capoau1 2 years ago
Oh and you need a resistor (to protect the LED) in line with each Zener. If you use a single resistor for every Zener I dont think it will work.
Capoau1 2 years ago
Do you have a schematic for the build?
sorstudios 2 years ago