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

Solid State Talk all about solid state amplification.

Speaker switch
Speaker switch
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
Reply
 
Thread Tools Search this Thread
Old 7th August 2008, 12:36 AM   #1
smithy666 is offline smithy666  Australia
diyAudio Member
 
Join Date: Mar 2001
Location: Sydney
Default Speaker switch

I'm just starting to design an A/B speaker switch, that will use a small 8 pin PIC (12F675) and a couple of latching relays, operated by any style of momentary push button switch. It will also provide LED indication of which speaker is selected. I will design a couple of PCBs to suit. Just testing to see if there would be any interest in this project - if so I will get a few more PCBs made at the time.
  Reply With Quote
Old 7th August 2008, 07:04 AM   #2
Jan Dupont is offline Jan Dupont  Denmark
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Please provide some details like power handling, and how to get PIC source code etc.
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Spare time company (just for fun): www.dupont-audio.com
  Reply With Quote
Old 7th August 2008, 07:31 AM   #3
smithy666 is offline smithy666  Australia
diyAudio Member
 
Join Date: Mar 2001
Location: Sydney
I'm still looking at options for the relays, but would be min 8A switching rating. Going for latching does seem to limit the options available (at least for high quality sealed), and I prefer to use latching in this operation. I was thinking about paralleling 2, but I've gone off this due to concerns if 1 relay fails and doesn't switch over. Although I guess you would notice this (both speakers playing), so maybe it isn't such a big deal and it might be better power handling/quality wise to parallel two. Your thoughts?

Happy to make the source code freely available - there's no rocket science in it - so you can change it as you see fit (eg I'm making it light up 1 or 2 LEDs depending upon which speaker is selected)
  Reply With Quote
Old 7th August 2008, 07:40 AM   #4
Jan Dupont is offline Jan Dupont  Denmark
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Why latching relays ? You really narrow your choices....
If you want to make something easy to build, go for standard relays (consumption is only 30-40 mA at 24 Volts).
If you go for e.g. FINDER Series 4061 (16A) relays, the special Amplimo (20/100A) speaker relay fitīs in.
www.amplimo.nl
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Spare time company (just for fun): www.dupont-audio.com
  Reply With Quote
Old 7th August 2008, 07:50 AM   #5
smithy666 is offline smithy666  Australia
diyAudio Member
 
Join Date: Mar 2001
Location: Sydney
I really wanted to have next to zero power consumption (as these are never turned off) and having 4 relays potentially "on" all the time would be using a constant 4W. I know, it's not much but I would prefer if it was 0.1W (PIC power draw only)
  Reply With Quote
Old 7th August 2008, 07:52 AM   #6
Jan Dupont is offline Jan Dupont  Denmark
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Do you want two sets of speakers (two relays) connected "activated" at the same time

Edited
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Spare time company (just for fun): www.dupont-audio.com
  Reply With Quote
Old 7th August 2008, 07:56 AM   #7
smithy666 is offline smithy666  Australia
diyAudio Member
 
Join Date: Mar 2001
Location: Sydney
No but I would use one relay for the +ve, one for ground for each channel - sorry I wasn't clear
  Reply With Quote
Old 7th August 2008, 07:57 AM   #8
Jan Dupont is offline Jan Dupont  Denmark
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Why one for ground
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Spare time company (just for fun): www.dupont-audio.com
  Reply With Quote
Old 7th August 2008, 08:29 AM   #9
smithy666 is offline smithy666  Australia
diyAudio Member
 
Join Date: Mar 2001
Location: Sydney
I prefer to switch all connections. Just a personal preference. Likewise with preamp input switching.
  Reply With Quote
Old 7th August 2008, 08:49 AM   #10
Jan Dupont is offline Jan Dupont  Denmark
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
That's ok
I agree regarding preamp input switching to prevent crosstalk between inputs, but for speaker outputs I don't see the point....
However good luck with the project
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Spare time company (just for fun): www.dupont-audio.com
  Reply With Quote

Reply


Speaker switchHide 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
speaker selector switch blbarth Multi-Way 18 1st December 2017 11:35 AM
Low tech speaker switch needed clippo Multi-Way 4 30th April 2009 03:43 AM
altering a speaker selection switch ronpilgrim Parts 1 29th April 2009 04:58 PM
Speaker A/B switch Mikerobe Car Audio 4 6th January 2007 08:33 PM
SI Super-T and speaker AB switch to ONE speaker Taperwood Class D 25 24th March 2006 03:08 AM


New To Site? Need Help?

All times are GMT. The time now is 06:26 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki