Introduction: 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
5 years ago
nice!
Reply 5 years ago
Thank You !
6 years ago
What is the approximate cost? Where were the parts sourced from?
Reply 6 years ago
I have put buying inks in the last step. The approximate cost would be 2 to 3 dollars.
6 years ago
Magnifique.
Reply 6 years ago
Thank You :)
6 years ago
This is a great amplifier? What are the output watts?
Reply 6 years ago
Since this is a Bridge Amplifier design the output you can get around 2 watts
Reply 6 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.
Reply 6 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
Reply 6 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.
6 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)?
Reply 6 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.
6 years ago
Cool instruction video, quite informative and sensible.
Reply 6 years ago
Thank You :)
6 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.
Reply 6 years ago
Will surely try it out. Thanks :)