Ohm's law - LED resistor calculation
Ohm’s law states that the current through a resistive conductor (a resistor) between two points is directly proportional to the voltage across the two points. where I is current (amps or A), V is voltage (volts or V) and R is resistance (ohms or ). Example 1 – resistor calculation I have a 5 V supply and I want … Continue reading "Ohm’s law – LED resistor calculation"
Power calculations
Power calculations are required to ensure that devices operate within the manufacturers specified limits. In most cases these only require a single multiplication or division. Power is measured in watts (W) or milliwatts (mW). Given V and I … Power in an electrical circuit is given by where P is power (watts or W), V is … Continue reading "Power calculations"