LM317 Power Surge Plates 1.5A 1.25V-37V Adjustable DC Power Board

Description

What it is

The LM317 Adjustable Voltage Regulator 1.5A 1.25V-37V DC Power Board is a variable power supply board based on the LM317 integrated circuit. It allows the input voltage to be adjusted from 1.25V to 37V to a desired output.

Features

• Input Voltage: 1.25V – 37V
• Maximum Output Current: 1.5A
• Integrated Circuit Type: LM317
• Adjustable Output Voltage: 1.25V – 37V

What it is for

This board is ideal for powering audio amplifiers, LEDs, and other electronic components that require a variable voltage. It is particularly useful for beginner and intermediate level electronics projects.

Tutorial: How to Use LM317 Adjustable Voltage Regulator

The LM317 is an adjustable voltage regulator ideal for powering electronic components. Useful for beginners and intermediates.

What you need

• LM317 Adjustable Voltage Regulator
• 220 Ohm Resistor
• 100 Ohm Resistor
• 0.1 µF Capacitor
• 3V-37V Power Supply

Steps

1. 1. Check the desired output voltage using the formula Vout = 1.25(1 + R2/R1) + Iadj * R2.
2. 2. Set R1 to 220 Ohm and R2 to 100 Ohm for a 5V Vout.
3. 3. Connect the power supply to pin 3 of the LM317.
4. 4. Connect pin 1 to ground.
5. 5. Connect pin 2 to resistor R1.
6. 6. Connect pin 2 to resistor R2.
7. 7. Connect pin 2 to ground through a 0.1 µF capacitor.
8. 8. Check the output voltage with a multimeter.
9. 9. Refer to the datasheet for further details.

Mini project

Create a simple power circuit for an LED. Connect an LED to the LM317 circuit configured for 5V and observe the illumination.

Common mistakes

• Do not use output voltages higher than 37V.
• Verify the maximum circuit current (1.5A).
• Do not connect the power supply directly to pin 2.
• Ensure the output voltage is stable before connecting other components.

Recommended accessories

• Power supply 3V-37V
• LED
• Multimeter
• 100 Ohm Resistor
• 220 Ohm Resistor

Frequently asked questions

How can I calculate the maximum current?
Check the datasheet. For LM317, the maximum is 1.5A.

What are the output voltage limits?
1.25V-37V.

Can I use LM317 to power a microcontroller?
Yes, but make sure the output voltage is compatible with the microcontroller.

What should I do if the output voltage is not stable?
Verify the correct circuit configuration and check the stability of the power supply.