DIY Mini Amplifier Using TDA2822

by DIYTechStudio

27K27817

Intro: DIY Mini Amplifier Using TDA2822

Building a homemade amplifier using TDA2822

Follow the steps here or watch the video to make your own amplifier

STEP 1: Things Required

1. 10k Potentiometer

2. 100uF / 16 volt Capacitor

3. TDA2822

4. 10 Ohm Resistor (3)

5. 0.1uF Ceramic Capacitor (2)

6. 0.01uF Ceramic Capacitor

7. 10uF / 50 Volt Capacitor

8. 3.5 mm Male & Female Jack

9. Switch

10. USB Cable

11. PCB Board, Wires, Battery

12. Soldering Rod. Soldering Wire & Soldering Paste

13. Enclosure for Amplifier

14. Insulation Tape & Scissor

STEP 2: Circuit Diagram & TDA2822 Pin Configuration

STEP 3: Construction

Make all the necessary connection according to the Circuit Diagram as shown in the previous step

STEP 4: Finished Images

Enjoy Making !!!

To watch the testing video CLICK HERE

Testing begins @ 5:27

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17 Comments

MTspacez 7 years ago

What is the approximate cost? Where were the parts sourced from?

DIYTechStudio 7 years ago

I have put buying inks in the last step. The approximate cost would be 2 to 3 dollars.

DylanD581 7 years ago

This is a great amplifier? What are the output watts?

DIYTechStudio 7 years ago

Since this is a Bridge Amplifier design the output you can get around 2 watts

jimdkc 7 years ago

Well... it could be a bridged amplifier... except the input of one of the amps is grounded, so only 1 amp in the chip is active! To make it a bridged amp, you'd have to unground pin 6 and feed an inverted copy of the input signal to pin 6.

The way this amp is designed, half of the amp chip is wasted.

DIYTechStudio 7 years ago

Yes this is a bridged amplifier.

"The way this amp is designed, half of the amp chip is wasted" - This is not the case, The bridge amplifier has high output power whereas in the stereo design the output power will be less.This is the reason i have showed the bridge design

jimdkc 7 years ago

OK... I see from the datasheet of a TDA2822 that this is a correct bridge configuration.

Normally for a bridged amp, you have to drive both inputs. Apparently this amp chip takes care of that internally.

j666laz 7 years ago

Why do you use a stereo input jack when it is only a mono amplifier? Or is a stereo amplifier (you show a single speaker)?

DIYTechStudio 7 years ago

Hi, the stereo jack is turned into a mono jack. The only reason to use the stereo jack is because i didn't have any mono jack.

guds777 7 years ago

Cool instruction video, quite informative and sensible.

charleslinquist 7 years ago

The 10 ohm resistor (R1) will severely limit output power, and even if you do wish to limit power that way, I would recommend moving C1 so it connects between pin 2 (Vcc) and GND. Doing so will reduce distortion.