May 01 2016

Voltage Dividers Calculator

Category: DC — dq @ 12:21 PM

Click the button below to determine if you want to use R1 and R2 or R1 and Rtotal.

Click the button below to find which unknown value.

Now enter three of the values and click Calculate to find the fourth):

Ein (Volts In) R1 (OHMs Resistance) ????? Eout (Volts Out)




Voltage Divider Formulas
R1 & R2 R1 & Rtotal
Ei = (Eo/R2)(R1+R2) Ei = (Eo / (Rtotal -R1)) * Rtotal
R1 = (R2 * (Ei – Eo)) / Eo R1 = Rtotal – ( (Eo / Ei) * Rtotal )
R2 = (Eo * R1) / (Ei – Eo) Rtotal = (Ei / ( Ei – Eo )) * R1
Eo = Ei * R2 / (R1+R2) Eo = Ei * (Rtotal – R1) / Rtotal

Apr 25 2016

Series/Parallel Resistor Calculator

Category: DC — dq @ 1:58 PM

Click the button below for Series or Parallel.

Now enter the resistor values (‘R1’ and ‘R2’) and press Calculate:

R1 (OHMs Resistance) R2 (OHMs Resistance)


Good description here.

Apr 23 2016

OHM’s LAW Calculator

Category: DC — dq @ 8:09 AM

Two values are required to perform the calculation. Click the button below for two values you know.

Now that you have selected the two known values, enter those values below and then click the ‘Calculate’ button to display the remaing unknown values.

E or V (Volt) I (Ampere) R (OHMs Resistance) P (Power)




value
value
value
value
value
value
value
value
value

Good description here.

http://www.sengpielaudio.com/calculator-ohm.htm