Speaker Protector With MOSFET - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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 23rd April 2007, 01:03 AM   #1
diyAudio Member
Join Date: Apr 2007
Lightbulb Speaker Protector With MOSFET

Any thoughts on a speaker protector using a MOSFET.

Here is one I designed. Uses a SCR as a trip controller.

Simplicity is elegance.
DIY=Sticken It To The Man
  Reply With Quote
Old 23rd April 2007, 07:55 AM   #2
diyAudio Member
ifrythings's Avatar
Join Date: Oct 2005
I'm not the best with this kind of stuff, but I'll give it a shot.

The AC loss detect looks fine, but won't do anything if the SCR is limited by a 2.2M resistor (I don't beleive it will trigger), same goes with the DC detect.

The DC detect system doesn't make sense to me so I'll let someone else coment on it.

Theres no need for a 8 ohm resistor on the relay, why have one end of the speaker grounded and the other go through an 8 ohm resistor to ground, makes no sense to me.

P.S I re-did your schematic, I was having a hard time reading it.
Attached Images
File Type: gif protect.gif (9.8 KB, 262 views)
  Reply With Quote
Old 23rd April 2007, 10:49 PM   #3
diyAudio Member
Join Date: Apr 2007
The SCR is designed to take the bias from the mosfet. It does trigger and the 2.2Mohm resistor and the 16uf capacitor are just a time delay for the turn on.
Simplicity is elegance.
DIY=Sticken It To The Man
  Reply With Quote


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
DC protector ?? ping_31140 Pass Labs 9 18th January 2009 09:34 AM
Loudspeaker Protector muzza Solid State 49 29th April 2008 03:13 PM
Speaker protector gaminn Parts 0 9th April 2006 04:43 PM
Aleph 2 speaker protector? tomchaoda Pass Labs 9 8th January 2004 08:53 PM
What is a peripheral protector?? CryingDragon Solid State 8 13th September 2002 08:37 AM

New To Site? Need Help?

All times are GMT. The time now is 03:41 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2