2.1 HI-FI AUDIO AMPLIFIER LM3886+TDA7294 IC

Components
1. 9×22KΩ resistor 1/4W.
2. 9×1KΩ resistor 1/4W.
3. 5×10KΩ resistor 1/4W.
4. 5×100KΩ resistor 1/4W.
5. 2×47KΩ resistor 1/4W.
6. 2×2.2KΩ resistor 1/4W.
7. 1×330KΩ resistor 1/4W.
8. 1×4.7KΩ resistor 1/4W.
9. 1×680Ω resistor 1/4W.
10. 3×10Ω resistor 1W.
11. 4×2.2uF capacitor 25V/ 50V.
12. 4×22uF capacitor 25V/ 50V.
13. 2×10uF capacitor 25V/ 50V.
14. 2×47uF capacitor 25V/ 50V.
15. 1×47K/ 50K/ 100KΩ Preset.
16. 7×0.1uF (104) capacitor 50/ 100V.
17. 1×0.047uF (473) capacitor 50/100V.
18. 3×0.47uF (474) capacitor 50/100V.
19. 2×8 pin IC base/ socket.
20. 1×7812/ 7815 + voltage regulator.
21. 1×7912/ 7915 - voltage regulator.
22. 1×Led 3 mm (Green).
23. 1×3 pin connector Base/ Socket 2.54 mm.
24. 2×5uH coil with 10Ω 2W resistor (18 gauge copper wire)
25. 2×LM3886 IC.
26. 1×TDA7294 IC.
27. 3×6.3 mm vertical PCB terminal.
28. 1×Single turn potentiometer 100K.
29. 1×Dual gang potentiometer 100K.
30. 1× Bridge Rectifier GJB2510 (25 Amp).
31. 2×2 Pin Screw terminal.
32. 2×10000uF capacitor 35/ 50V.

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 - https://bit.ly/3sOHWez

PCB Layout & Schematic - https://bit.ly/3pgP2t2

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How to test this Amplifier

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.

Check Voltages - Check 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.

Power Supply - For get best performance of this amplifier, you use 18-0-18V to 24-0-24V 8A-10A Transformer.