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LM317

12 Amp Power Supply Circuit using Parallel LM317 ICs

Last Updated on January 18, 2025 by Swagatam 4 Comments

LM317 parallel 12 amp power supply circuit

This adjustable power supply is capable of delivering a maximum output of 12 A with an adjustable voltage from 4 V to 20 V through many LM317 ICs connected in parallel. It will allow testing of any device requiring a significant power supply, such as a direct current motor, a car amplifier, or even a […]

Filed Under: Power Supply Circuits Tagged With: LM317, Parallel, Power, Supply

How to Modify 78XX, LM323, LM350, LM317 Voltage Regulator Circuits

Last Updated on April 24, 2023 by Swagatam 8 Comments

78XX regulator pinout

In this article I have explained many different methods of modifying voltage regulators ICs to improve their voltage and current handling characteristics. We learn how to externally modify these regulators using transistors and ICs for upgrading their current and power handling capacities. We discuss how to modify 78XX ICs, LM317 ICs, LM350 ICs, and LM323 […]

Filed Under: Power Supply Circuits Tagged With: 78XX, LM317, LM323, LM350, Modify, Voltage

Single LM317 based MPPT Simulator Circuit

Last Updated on July 15, 2019 by Swagatam 119 Comments

mppt 2

To make this simple MPPT circuit we first modify a standard LM317 power supply circuit into a buck converter then configure it with a solar panel for implementing an MPPT function. Modifying a LM317 Power Supply into an MPPT Solar Optimizer In our previous article I have explained how a standard LM317 power supply could […]

Filed Under: Solar Controller Circuits Tagged With: Based, LM317, MPPT, Simulator, Single

LM317 Variable Switch Mode Power Supply (SMPS)

Last Updated on August 22, 2024 by Swagatam 118 Comments

variable switching power supply using LM317 2

So far in this website we have studied LM317 based linear power supply circuits, here I have explained how an LM317 can be executed as a variable switch mode power or SMPS with zero loss. LM317 as Linear Regulator We all know that an LM317 IC is internally designed to work as a linear voltage […]

Filed Under: Power Supply Circuits Tagged With: LM317, Mode, Power, Supply, Switch, Variable

LM317 with Outboard Current Boost Circuit

Last Updated on December 10, 2023 by Swagatam 177 Comments

317 2

The popular LM317 voltage regulator IC is designed to deliver not more than 1.5 amps, however by adding an outboard current boost transistor to the circuit it becomes possible to upgrade the regulator circuit to handle much higher currents, and upto any desired levels. You might have already come across the 78XX fixed voltage regulator […]

Filed Under: Power Supply Circuits Tagged With: Boost, Current, LM317, Outboard

Simple RGB LED Color Mixer Circuit using LM317 IC

Last Updated on January 3, 2024 by Swagatam 22 Comments

High quality 3 watt rgb led with 2

In this post I have explained a simple LM317 IC based RGB 3 watt LED color mixer circuit, which can be used for demonstrating the color mixing effects of red, blue, green colors as specified in the standard color charts. The idea was requested by Mr.Praveen. Technical Specifications My name is Pravin, I work in […]

Filed Under: Lamps and Lights Tagged With: Color, LED, LM317, Mixer, RGB, Simple

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