Introduction: Noise Filter for the Power Supply Effects Pedals

If you have the noise from the power supply if you do not sleep at night and think how to get rid of noise in your amplifier, we suggest to assemble a small and very simple circuit (with pictures!) To remove the interference.

Filter circuit power set predstavleaya scheme does not quite apply to filters, but to help the primitive measures you can.

Step 1: Schematic Diagram

Input power is supplied to connector J1, directly from the output of our pedal power supply. Diode D1 - protects against reverse polarity. R2 - limits the current that flows to the LED D2. If the LED is not necessary - removing it and R2, too. Noise reduction is engaged in the capacitors C1 and C2, resistor R1.

Step 2: Location and Connection Elements

What can then be used:

- Any LED that you enjoy

- Resistors constant power of 0.25 watts or more

- 1N4001 diode, or anyone with a current of at least 1A

- Electrolytic capacitor C1, the supply voltage of 16-25 V, 100 uF

- Capacitor C2 47 nF (desirable film), 50 Volt

That's basically it. Putting it. Connect. The truth may not always help the situation is different and causes of interference as well.

Comments

author
KingL22 (author)2017-09-08

I am not sure on the wattage of R1. 0.25 Watts would only allow for a small amount of current through 100 Ohms. Am I missing something?

author
aryajaya (author)2017-02-14

I try it, with my SLA 12v7aH battery. This module make a voltage is down when it connected with some MP3 player with amplifier. And the resistor have a high temperature condition. It's normal?

author
aryajaya (author)aryajaya2017-02-20

i modified it ..... thanks for your easy schematic Cubozoa.
this will reduce high temperature of resistor ..... i use it for 12v SLA battery.

DC_filter_1.jpg
author
colinrobot (author)2016-08-01

can I use a small ceramic for C2 or does it have to be film?

author
Cubozoa (author)colinrobot2016-08-01

Yes, you can use ceramics. It will be better. even better - tantalum. But tantalum such containers like no.

author
colinrobot (author)Cubozoa2016-08-01

Thanks Cubozoa

author
MerwinMusic (author)2016-01-02

Is there a current limit on this circuit?

author
Cubozoa (author)MerwinMusic2016-01-03

Hey. No. But you can add a field effect transistor.

author
jmuncher (author)2015-10-06

I miss BeavisAudio!! I remember this was one of my first pedal projects, great for reducing hum noises from bad power supplies

author
omnibot (author)2015-10-06

Nicely done. I modeled it in EveryCircuit on my way to work.
http://everycircuit.com/circuit/5198188983091200

temp_-1676034139.jpg
author
Cubozoa (author)omnibot2015-10-06

Well done, well turned out at you.

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