ohms law calculations
I thought users would find this easy to understand
First of all we need to collect the following information:
- The voltage of the supply
- The forward voltage of the component eg L.E.Di<
- The current the component uses
For calculating resistance we use the formula R= V ÷ I lets take the following as an example: Blue LED = 3.4V Forward voltage and 30mA maximum current, The supply voltage is 12V DC.
Step 2 We convert the current rating from mA into A we simply divide by 1000.
We now have R = 8.6 ÷ 0.03 Therefore R = 286 Ohms