LED's - A1 Electronic Parts - Serving the Toronto area for 30 years!
All LED`s require a resistor in series to limit the current to the required specification (usually 20mA) Use ohm`s law to calculate the value of the resistor required. Most LED`s have a voltage drop of 2 volts. Blue & white LED`s are 3.5-4 volts V = IR (v...