# 10.84 Volts to 1 volt or .90 volts

Discussion in 'General Electronics Chat' started by Bcog, Jan 21, 2008.

1. ### Bcog Thread Starter New Member

Jan 21, 2008
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0
I would like to take 10.84 volts and bring it down to max output of 1 or .9 volts so I can controll the voltage from .90 volts to 0 volts with a potentiometer.
Does anybody know of a rectifier diode I can purchase to bring the voltage down from 10 to 1 volts. Or any other options to get this done.
Ive never studied electronics so go ahead and laugh if this is too simple of a problem

2. ### Audioguru New Member

Dec 20, 2007
9,411
896
Hee, hee, hee, haw, haw, hee, hee, haw. haw, hee, hee, etc.
A rectifier diode drops a DC voltage about -0.7V.
You forgot to say if your 10.84V is AC or DC.

A pot controls a voltage that has a very low current. The pot usually controls the output of an electronic power circuit.
You didn't even mention how much current you need.

3. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
It's pretty hard to give an accurate answer without knowing more about the application.

This could be very easy, or a bit difficult, depending.

4. ### scubasteve_911 Senior Member

Dec 27, 2007
1,202
1
Hi,

First, pick two or more zener diodes to give the appropriate voltage drop. I would say, between 9.84 and 9.94. This is about 9.9V, so 5.6V and 4.3V are standard zeners. Then, follow the instructions on the following page to make a zener regulator..Or, I guess you can use a LM317 regulator to take it down.

http://www.reuk.co.uk/Zener-Diode-Voltage-Regulator.htm

But, this really depends on how much current you expect to get from your 0-0.9V supply. Or, if you want it proportional to your supply, that's another story.

Steve