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2.1 hi-fi Stereo + Subwoofer 90 Watts audio amplifier TDA2050 ic.

components ᐅ
1. 3×TDA2050 ic.
2. 1×4558D/ TL072/ TL082/ NE5532 ic.
3. 7×22KΩ resistor 1/4W.
4. 3×10KΩ resistor 1/4W.
5. 2×680Ω resistor 1/4W.
6. 2×47KΩ resistor 1/4W.
7. 1×1MΩ resistor 1/4W.
8. 3×2.2Ω resistor 1/2W.
9. 1×0.047uF (473) capacitor 50/100V.
10. 5×0.47uF (474) capacitor 50/100V.
11. 4×0.1uF (104) capacitor 50/100V.
12. 3×22uF capacitor 25/50/63V.
13. 3×1uF capacitor 50/63V.
14. 2×47uF capacitor 25V.
15. 2×4700uF capacitor 25V.
16. 1×3 pin screw terminal.
17. 1× Bridge Rectifier GBU1508/ GBU808/ GBU606
18. 1×2 pin connecter base/ socket 2.54 mm.
19. 2×3 pin connecter base/ socket 2.54 mm.
20. 1×47K dual gang potentiometer.
21. 1×47K single turn potentiometer.
22. 1×8 pin ic base/ socket.

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.

How to order PCB at

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First Search on Google 'PCBWay'. Then go to

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After create account click on 'Delivery Address'. Then fill up your Delivery Address.

After fill up Delivery Address, again go to home page of 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 option, choose your country and shipping method. And then click on 'Save to Cart'.

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

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 4Ω Load - 35 Watt true RMS power at THD = 0%, VS = ±18 V, frequency = 1 kHz.
 8Ω Load - 32 Watt at THD = 10%, VS = ±22 V, frequency = 1 kHz. 

Amplifier Output - 90 Watts true RMS power into a 4Ω load at THD = 0%, VS = ±18 V, frequency = 1 kHz.

How to make PCB by ironing method ᐅ

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 was 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

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.

Check 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


  1. I made it.. wonderful it's working 😉.. super deep bass and clear sounds.. good..

  2. Hey can i use 20v dual supply power supply ?