Ohm’s Law CalculatorCalculate circuit parameters using Ohm's Law Enter any two known values and press "Calculate" to solve for the others. Voltage (V) Current (A) Resistance (Ω) Power (W)
Need to make variable DC power supply 0 -100 v current 2 amps. With coarce snd fine addjustments for voltage with 3 1/2 digit meters for both volt and current
If you use a linear approach, there will be a lot of heat dissipation. Better to use a transformer based design.
A linear design is shown below:
you can upgrade it to 100V by replacing the power transistors accordingly, and by changing R3 to 10K 1 watt
Hi Swatagam, could you please explain to me in detail the formula, resistance in parallel. I understand how to calculate for two resistors in parallel but don’t know how to calculate for more then two, beyond many textbooks just stating the formula as 1\R1+ R2+R3+R4…. Please detail this concept of reciprocals. P.s. I’m a hobbyist.
Thank you very much for caring and sharing such a wonderful site. P.s. I’m a hobbyist.
Thank you moboy, It is actually very basic, here’s the formula for calculating resistors in parallel:
1/R = 1/R1 + 1/R2 + 1/R3….1/Rn