voltage gate circuit... help! - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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 14th January 2013, 08:40 AM   #1
Mordor is offline Mordor  Italy
diyAudio Member
 
Join Date: Jun 2004
Location: Venice
Lightbulb voltage gate circuit... help!

Hi, for a project i need to make a protection circuit.
Input can be from 1 to 65 70 volt.
Output must be on from 20.5 to 56.5 ( with mosfet always in saturation or closed, not in half state) taking out lower voltages and higher voltages... a voltage band pass gate with 1 ampere max.
I played with mosfet and zener, the way is right.
Some idea about a simple des for it ? thank!

Last edited by Mordor; 14th January 2013 at 09:30 AM.
  Reply With Quote
Old 14th January 2013, 10:53 AM   #2
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
Use a window comparator. Attenuate the voltage to the required levels if u use the IC comparator/opamp in the circuit.

Gajanan Phadte
  Reply With Quote
Old 14th January 2013, 02:03 PM   #3
Mordor is offline Mordor  Italy
diyAudio Member
 
Join Date: Jun 2004
Location: Venice
i was trying to use resistors zeners and mosfet in order to make this in a simple and discrete way ... opamp? so u mean use a normal op amp with zener resistor for supply, and partitor for compare values ?
  Reply With Quote
Old 14th January 2013, 02:15 PM   #4
diyAudio Member
 
Join Date: Apr 2012
Location: Kiel, Germany
LTC4366 not exactly what you need. You might be able to build something around it.
  Reply With Quote
Old 15th January 2013, 01:34 AM   #5
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
Being a PIC man I always use a small PIC to monitor the output voltage for DC.
If DC is detected for 500mS the PIC turns off the output relay.
The same PIC also has a 3 second power up delay before turning on the relay.
It can be done with an 8 pin PIC very easily.
__________________
PCBCAD50 software. http://www.murtonpikesystems.co.uk
  Reply With Quote
Old 15th January 2013, 02:07 AM   #6
diyAudio Member
 
Join Date: Nov 2008
Location: Victoria,TX
Blog Entries: 1
Hi,
I think this is what are you looking. Check this link:Voltage Comparator Switch
  Reply With Quote
Old 15th January 2013, 04:31 AM   #7
gootee is offline gootee  United States
diyAudio Member
 
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
Maybe some of the circuits used to protect against automotive load dump would work for you. Try google.
  Reply With Quote

Reply


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
DD amp, no enough voltage on Gate nonprof Car Audio 5 5th September 2012 06:37 AM
Noise gate circuit AuroraB Analogue Source 2 12th January 2011 09:18 PM
mosfet gate voltage question carpenter Pass Labs 6 22nd July 2009 02:34 AM
Audio Gate Circuit / frequency filters, too? junktl Everything Else 0 23rd January 2009 06:36 PM
MOSFET gate voltage xplod1236 Parts 17 4th December 2004 03:23 PM


New To Site? Need Help?

All times are GMT. The time now is 06:43 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2