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As a bonus, it will also calculate the power consumed by each LED.

Just input the indicated values and press the 'Calculate' button. but we must limit the current to 30ma so effectively the Resistor has to drop 9.8v and limit the current to 30ma (or less) so if we divide 9.8v by 0.030 it will give 326.6 so we need a resistor of around 326.6 ohms.This calculator will help you determine the value of the resistor to add in series with the LEDs to limit the current. Isentropic Flow Relation Between Pressure And Density Calculator.Ok so let us say the LED needs 2,2v and the supply is 12v so we have 9.8v to effectively get rid of. Compression Spring Wire Length Calculator. Radio Frequency Power Density Calculator. Mechanical Advantage Of A Lever Calculator. If the LEDs are connected in series, the current through. If several LEDs are connected in parallel, the current through the resistor is the sum of the currents through all LEDs. The value of the resistance is obtained simply by applying Ohm's law: R = V R /I T. so the voltage drop across the resistor is: V R =V i - V led. In fact, if there are 'N' number of similar LEDs connected in series, then the LED Resistor Calculator equation can be written as follows: R S = (V S - V F * N) / I F. For the LM338 and LM350 regulators, 120 ohms is typically used for the program resistor R 1.If there are two LEDs connected in series, then the equation to calculate the Series Resistor will be the following: R S = (V S - V F * 2) / I F. Typically, the program resistor (R 1) is set at 240 ohms for the LM117, LM317, LM138 and LM150 regulators. This Voltage Regulator Calculator will work for all voltage regulators with a reference voltage (V REF) of 1.25. 20~60W - Hard Wire UL Listed 35~350W - Enclosed LRS Series 40~120W - Hard Wire PWM Series 40W - MagTech Hard Wire 40~600W - Hard Wire HLG Series 120W. 12VDC Output Voltage 8~35W - Hard Wire APV Series 12~24W - Phihong Wall Mount 16~90W - Hard Wire LPF Series 18~90W - Desktop GST Series 20~100W - Hard Wire LPV Series 20~60W - Hard Wire UL Rec.

Free photo christmas card templates with wood grain