Introduction: DC Motor Speed Controller Using LM317 Adjustable Voltage Regulator IC

By ElectroMaker

Hi Makers, This is a article showing you how to construct a simple DC Motor speed controller.

Step 1: Watch the Video

Nothing better than a video, I Recommend watching them video first. There you'll find the working and practical example of the build.

Step 2: Have a Look at the Schematic Below

Step 3: Look for Needed Parts

IC1- LM317 Adjustable Voltage Regulator IC

R1- 220Ω

R2- Variable Resistor / Potentiometer Of Value 5KΩ

D1- 1N4148 (Rectifier Diodes Will Also Work Like 1N4007)

C1- 10 To 1000 uF (Not necessary, Just to ensure a stable output)

C2- 10 To 1000 uF (Not necessary, Just to ensure a stable output)

Q1- TIP3055 (other power transistors can also be used like TIP41C)(NPN)

Input- Upto 37 Volts



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Step 4: