Description: To calculate the value of a resistor in ohms to be inserted between a voltage supply and some electronic partdevice subtract the voltage the device expects target voltage in volts from the supply voltage in volts then divide the result by the current the device expects target current I in ampsFor example to power a 2V 35mA LED lightemitting diode by a 9V battery insert a 9V 2V 0035A 200 resistor between the positive terminal of the battery supply voltage and the anode positive pin of the LED Finish the circuit by connecting the cathode negative pin of the LED to the negative terminal ground of the batteryIf the result of the formula is a value of a resistor that does not usually exist eg 953 use the next higher value available eg 100 or else you will blow the LED or other device
By: AdamStanislav
Date: 2017-09-30
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Downloads: 73
Filesize: 6009
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Resistor Formula sourced from Openclipart is licensed under CC0 1.0
* Note: Date might not match original source and might be an educated guess.