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DIY Adjustable Voltage Regulator for Beginners

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Posted on: 30 November 2019

This tutorial explains how to make a simple adjustable voltage regulator using LM317. You will learn how it works, how to develop the circuit, whether cooling is required, and how to cool the regulator properly.

Topic: Basic adjustable voltage regulator tutorial.

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Recommended Tools

• MUSTOOL MT8206 2-in-1 Intelligent Digital Oscilloscope Multimeter
  View Product
• DANIU PX-988 90W Digital Thermostat Adjustable Soldering Iron
  View Product

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Necessary Materials

• LM317 Voltage Regulator IC – Buy
• 0.1µF Capacitor – Buy
• 10µF / 33µF Capacitors – Buy
• 5K Potentiometer – Buy
• 1N4007 Diode – Buy
• 5mm LED – Buy
• PCB Board – Buy
• 5×5 cm 12V Cooling Fan – Buy
• 3300µF 25V Capacitor (or 4700µF) – Buy
• 1.5KΩ 1W Resistor – Buy
• 240Ω 1/4W Resistor – Buy
• 24V Transformer – Buy
• Soldering Iron Stand – Buy

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Basic Adjustable Regulator Circuit

This is the simplest LM317 adjustable voltage regulator circuit configuration.

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More Stable and Protected Version

This version adds extra components for better voltage stability and protection.

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Power Supply

Use a suitable transformer, rectifier, and large filter capacitors before feeding the LM317 regulator. Proper filtering improves output stability.

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Tags

adjustable voltage regulator, DIY power supply, LM317 regulator circuit, voltage regulator, electronics

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