Ohms Law

There is a post regarding ohms lawⁱ you can see more of that by following: http://circuit-hut.co.uk/Ohms-Law<

This post aims to explain Ohms law in more detail.

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