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Low Pass Filter


1. 4×10KΩ resistor 1/4W.
2. 1×100KΩ resistor 1/4W.
3. 1×4.7KΩ resistor 1/4W.
4. 2×47KΩ resistor 1/4W.
5. 1×330KΩ resistor 1/4W.
6. 1×680Ω resistor 1/4W.
7. 4×Diode 1N4007.
8. 1×LED 3mm.
9. 1×Preset 20k.
10. 1×4558D/ NE5532/ TL072 IC.
11. 2×3 pin connecter base 2.54 mm.
12. 1×2 pin connecter base 2.54 mm.
13. 1×0.047uF(473) capacitor 50V.
14. 2×0.47uF(474) capacitor 50V.
15. 2×0.1uF(104) capacitor 50V.
16. 2×47uF capacitor 25V.
17. 1×7812/ 7815 +V Regulator.
18. 1×7912/ 7915 -V Regulator.
19. 1×47K/ 100K Single turn Potentiometer.
20. 2×2200uF capacitor 25V.

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.

PCB Layout & Schematic:-

Hello guys, in this post I make a Low Pass Filter (LPF). For this Low Pass Filter, I have used NE5532 dual channel OP-AMP IC. But in place of NE5532 IC, you can use 4558 or TL072 IC. This Low Pass Filter is compatible with all audio amplifier. So you can use this Low Pass Filter with any amplifier. For designing my PCB, I used EasyEda online software. Then I export the Gerber file (which you can download). And then I go to for manufacturing my PCB. PCBWay are the largest PCB manufacturer in China. They offer Standard PCB, Advanced PCB, Rigid-Flex PCB, SMD-Stencil and PCB Assembly Service. Here you get, 100x100mm 2 Layer PCB only at $5, And processing time within 24 hour. And they distribute, worldwide. The more you order, the less price you have to pay.

You just need to upload the Gerber File, and select the quantity, color, silkscreen, thickness etc. Then select your country, and shipping method and then Pay. PCBWay will deliver your PCB within 7-10 days.

After 7 days I have received my PCB. You can see the PCB quality, it's awesome. I have ordered Black 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.

Testing Method After Complete This LPF

Check Voltages:- Check Audio 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:- Recommended Transformer 12-0-12V 750mA to 1A.

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