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You can use 2 or 3 LM317 to increase current capacity up to 4 amps, use resistors of 0.22 Ω 10 W at the output of each lm317. You can use this source with fixed voltage, to power certain equipment, example 17.8 volts per 1 Ampere.
#Lm317 application circuits series
To fine voltage adjustment, uses a 220 Ω potentiometer in series with the potentiometer of 4.7k.Ĭonnect a voltmeter to the output to determine the voltage. Modifications to the power supply circuit with lm317t Schematic Lm317 adjustable voltage regulator Diagram Circuit Lm317 Voltage Regulator Circuit Adjustable Power Supply. Then we will use a transformer with commercial value of 20VAC.įor other calculations, see this calculator for Windows To find out which transformer you need, make a simple account:Įxample, I need an adjustable power supply up to 24V The transformer that will determine the maximum voltage obtained at the output of the power supply, in this way you must choose a transformer that meets your needs. In the AC connectors, you must connect a 24 volt transformer with a current capacity of at least 1.5 amperes. The CI lm317 is low cost and can be found with facilities in electronics stores. Unlike complicated transistor sources, this is an excellent choice for anyone who wants an adjustable power supply with a current capacity of up to 1.5 amperes. To be used as a battery and battery eliminator in most applications. This power supply uses the LM317T integrated circuit, which allows the output voltage to be varied between 1.2 and 30V with currents up to 1.5 Amps. Circuit regulated power supply, adjustable from 1.2 to 30V/1.5A with the ic regulator lm317T use to substitute eliminator of piles and batteries in your circuits. Circuit lm317 voltage regulator circuit adjustable power supply.