Simple Potential Divider

Simple Potential Divider Vin = 12V Total Resistance = 10K + 22K = 32K Current can be got from Ohm Law I = Vin/Rtotal = 375uA Voltage measured between R1 and R2 with reference to ground (Vout) is Vout = Vin X (R2/Rtotal) = 12 X (22,000/32,000) = 12 X (22/32) = 8.25V Note: R1 and R2 could be replaced with a variable resistor (Pot) of 32K and would give a full range of volatges between 0V and 12V at Vout.