Electronics Calculators

An LED Resistor Calculator helps electronics technicians, electrical engineers, automation professionals, students, and hobbyists select a suitable current-limiting resistor for an LED circuit. It uses the supply voltage, LED forward voltage, desired forward current, and number of LEDs to calculate the required resistance and minimum resistor power dissipation. A standard …

A Resistor Color Code Calculator helps electronics technicians, electrical engineers, automation professionals, students, and hobbyists decode the resistance value represented by colored bands on an axial resistor. By selecting the number of bands and their colors, the calculator determines resistance, multiplier, tolerance, and, where applicable, temperature coefficient. Resistor color bands …