https://home.roboticlab.eu/ 2026-04-04T16:47:25+00:00 https://home.roboticlab.eu/ https://home.roboticlab.eu/_media/wiki/logo.png text/html 2020-07-20T09:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/electronics/led_resistor?rev=1595235600&do=diff LED Resistor Calculation If the supply voltage is higher than the LED's voltage, the resistor has to be included in the circuit in series. The resistor limits the current and produces the required voltage drop. To find the correct value for the resistor, the following equation is derived from Ohm's law: text/html 2020-07-20T09:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/electronics/ohms_law?rev=1595235600&do=diff Ohm's Law Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them, provided that the temperature remains constant. text/html 2020-07-20T09:00:00+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/electronics/voltage_divider?rev=1595235600&do=diff Voltage Divider A voltage divider is an electrical circuit which divides the input voltage. The output voltage is a portion of the input voltage and the value of the output is dependent on the resistor ratio in the circuit. The schematics on the right includes two resistors.