Electronics

Electronics made easy

  • Voltage (V), Resistance (R) and Current (I). V measured in Volts, R measured in Ohms, I measured in Amps. (1amp=1000 milliamp or ma)

  1. Voltage = IR , V/R=I

  2. Example, to compute R for an LED. Vsource-Vled/I = R needed. 5V-1.7V/.010 A (10ma) =330 ohms (Vled is forward voltage of LED from data sheet)