#### nerosrevenge

##### New Member

I will start by admitting that I have no formal education in micro-electronics (which I intend to rectify very soon) but I am facinated thusfar.

I am attempting to build a voltage regulator using Zener Diodes. I need to know how to calculate the required value of a resistor for use in the circuit.

The supply voltage is 12vdc. The required output voltage is 3vdc (although I am having difficulty finding a Zener with this at this voltage, I hope I worded that right!).

Is there a calculaiton to determine the value of the resistor I need??

Thank you all very much!!

Steve.