Ad Code

Subscribe Us

320 Watts Hi-Fi 2.1 Audio Amplifier using TDA7294 IC.


1. 12×22KΩ resistor 1/4W.
2. 11×10KΩ resistor 1/4W.
3. 4×680Ω resistor 1/4W.
4. 2×47KΩ resistor 1/4W.
5. 1×1MΩ resistor 1/4W.
6. 2×2.2KΩ resistor 1W.
7. 1×Zener Diode 1N4148.
8. 1×0.047uF (473) capacitor 50/100V.
9. 4×0.1uF (104) capacitor 50/100V.
10. 6×0.47uF (474) capacitor 50/100V.
11. 1×8 pin IC base/ socket.
12. 2×47uF capacitor 25/50V.
13. 8×22uF capacitor 50/63V.
14. 4×10uF capacitor 50/63V.
15. 5×6.3 mm vertical PCB terminal.
16. 2×2 Pin Screw terminal.
17. 1×3 pin connecter base/ socket 2.54 mm.
18. 1×Single turn potentiometer 100K.
19. 1×Dual gang potentiometer 100K.
20. 1× Bridge Rectifier GJB2510 (25 Amp).
21. 4×TDA7294 IC.
22. 1×4558/ TL072/ TL082/ NE5532 IC.
23. 2×10000uF capacitor 50/63V.


License► ©Technical Mriganka. You can't use this PCB Layout and Gerber File for commercial purpose. You can use this PCB layout and Gerber file only for Educational and DIY projects.

Gerber File

PCB Layout

320 Watts Hi-Fi 2.1 Audio Amplifier using TDA7294 IC.

One mistake was made on this amplifier. Must watch If you want to make.

One mistake was made on this amplifier

I was forget to place two 15 Volt 1 Watt Zener diode. So after complete this amplifier, don't forgot to place these two Zener diode. You can see The Video, How I place these diode after complete this amplifier.

How to order PCB at

Click here (

First Search on Google 'PCBWay'. Then go to Then sing in or create new account on PCBWay. Then click on 'Quote Now'.

Then click on 'Quick-order PCB: Upload Gerber files & autofill parameters'. Then upload your Gerber file, PCBWay automatic detect PCB parameters. Then you can change something, like - PCB quantity, PCB color, Silkscreen etc.

After choose your PCB, choose your country and shipping method. And then click on 'Save to Cart'.

If your PCB approved, click on 'Proceed to Checkout'.

If you order PCB first time on PCBWay Then you have $5 coupon. For use your $5 coupon, click on 'Choose a coupon'. Then select your $5 coupon. Then click on 'Discount coupon'. And then click 'Place Order'.

Then select 'Payment Methods' and Pay.

After one week I received my PCB. You can see the PCB quality, it's awesome. I ordered red color PCB. But you can choose your PCB color. PCBWay provide total 9 color solder mask - green, blue, red, purple, black, white, yellow, matte black and matte green. On PCBWay you can get 100x100mm 2 Layer PCB only at $5. Maximum size PCB you can get 500x1100mm. And maximum Layer is up to 14 Layers. And If you order PCB first time at PCBWay, then you get a $5 discount coupon. So upload your Gerber today and get best quality PCB.

How to make PCB by ironing method

For make PCB you need PCB layout. Download the PCB layout and print it by laser printer on photo paper. Then cut the PCB layout. Then press the PCB layout by iron on copper clad board. Press the iron 10-15 minutes. Then leave the PCB for cool down 10 minutes. When the PCB will cool, put the PCB in water and move the PCB layout to copper clad board. Then put the PCB in ferric chloride [FeCl3+H2O] for etching 10-15 minutes. when etching will end, clean the PCB by water. Then make hole on PCB. And then press the upper side print of PCB. Now your PCB is ready, mount components by instruction.

How to test this Amplifier

Check Continuity - First check continuity of IC and Heatsink by multimeter. Here you get no continuity.

Series light test - After complete this board don't forget to series light test. When you will on this amplifier via series light, it glow for some time (1 - 2 sec). Then series light will turned off fully. If the series light will fully turned off, then check the voltages.

Power Supply - For get best performance of this amplifier, you use 24-0-24V 10A Transformer. However this amplifier will on 12-0-12V. (only for test this amplifier I use 18-0-18V 4A transformer)

Check VoltagesCheck all Speaker Output and Audio Input voltage. Here you get no voltages 0.00V. If you get same voltages, then connect preamplifier to input and connect speaker to output.

Post a Comment