The project shown here is a schematic of LM317 5A variable Or adjustable power supply circuit. LM317T is a very famous voltage regulator IC mostly used in many types of power supply circuits and battery charger circuits. It is available in TO 220 transistor package in the market. The IC has many
great built in features which makes it ideal to use as a fixed and variable voltage regulated power supply for variety of purposes in electronics.
Moreover the IC is also very low in prices and available almost at every electronics shop, due to which you can easily get it.
The output current of the IC is 1.5A but in this circuit we have used a power transistor 2N3055 to increase the output current to 5 ampere. The output voltage of the circuit is from 1.2 to 24V and you can adjust this voltage with the help of 5K potentiometer. You can also use 5K variable resistor in the place of 5K pot if desired. The transformer can be a 110 or 220 to 24 volt with 5 to 10 ampere current ratings.  The transistor and IC will heatup during operation due to which they should be properly heatsinked. 





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LM317 5A Variable / Adjustable Power Supply Circuit
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