Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

modifying a PCB for a simple low pass
modifying a PCB for a simple low pass
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 12th July 2012, 11:08 PM   #11
sreten is offline sreten  United Kingdom
Join Date: Nov 2003
Location: Brighton UK

It looks hard because your making no attempt to understand it.

To mix two channels to mono you need 3 resistors :
L+ via a resistor1 to mono+, R+ via a resistor2 to mono+ and
the third resistor between mono+ and the common ground.

For a low pass filter you put a capacitor in parallel with R3.

For a 22K input use 10K for R1 and R2, 20/22K for R3.
A 0.47uF capacitor will give you a near 100Hz 1st order.
1uF near 50Hz, 0.27uF near 200Hz, 0.1uF near 500Hz.

rgds, sreten.
  Reply With Quote
Old 27th July 2012, 08:51 PM   #12
equaleyez is offline equaleyez  Belgium
diyAudio Member
Join Date: Jul 2012
Location: Brussels
Thanks again,

That makes more sense to me.
I went to my local electronics store to get some R's and C's but they asked me what voltage I needed. I couldn't reply so they couldn't help me out... What should it be?
  Reply With Quote
Old 28th July 2012, 10:34 AM   #13
DF96 is offline DF96  England
diyAudio Member
Join Date: May 2007
I assume they were talking about voltage rating for the caps. What voltage would you expect to see on this connection? Very roughly, does not have to be exact; you can calculate with or without a Mac. My guess is a few volts at most. Film caps typically start from about 50V rating, so almost any voltage rating will do.

Specifying components, even at the most elementary level, often seems to be a topic omitted from university courses yet it is important for both operational and safety reasons.
  Reply With Quote
Old 14th September 2012, 09:15 AM   #14
raja978 is offline raja978
diyAudio Member
Join Date: Aug 2012
how to Low pass filter - Subwoofer Pcb Size
  Reply With Quote


modifying a PCB for a simple low passHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
simple low pass RC filter noob question mr.duck Parts 18 18th October 2015 10:37 AM
5KHz simple low pass audio filter needed neazoi Solid State 14 5th November 2010 12:50 PM
designing simple low pass subwoofer filter asbn369 Subwoofers 8 2nd August 2010 12:55 PM
Low pass filter for simple sub on single rail? tubee Chip Amps 9 21st February 2008 02:28 AM
Need simple low pass for wireless Mic mlanier911 Instruments and Amps 10 19th January 2007 11:53 AM

New To Site? Need Help?

All times are GMT. The time now is 01:21 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio