P channel Mosfet switch schematic - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

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 18th March 2009, 04:17 PM   #1
diyAudio Member
Join Date: Dec 2003
Location: Massachusetts
Default P channel Mosfet switch schematic

Hi folks,

For my project I have a 5 volt signal that is coming in and when it does (high) I want to switch a 12-13 volt supply to another part of my circuit.
The 5 volt is low current and the 12-13 volt is only pulling around 120mA.
I am using a P channel mosfet as a switch (I can't use an N channel as I can't isolate my system from ground). My main load does not have any weird inductive or capacitive loads, its real simple to drive.

I am not great at electronics schematic design but I am good at designing PCB boards and breadboarding etc.
Does anyone have a schematic for this simple circuit? it would help me out a great deal!

  Reply With Quote
Old 18th March 2009, 04:35 PM   #2
diyAudio Member
Join Date: Dec 2003
Location: Massachusetts
Looks like with the P channel when the input is high the output is low and vice versa, if I used a NOT logic chip on the input of the mosfet this should work to switch things back to normal?
  Reply With Quote
Old 18th March 2009, 07:53 PM   #3
mjf is offline mjf  Austria
diyAudio Member
Join Date: Jan 2009
Location: Austria
a not logic inverts the signal.........
or if you need more than 5v output you can use an inverted opamp (with gain ).......
  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

New To Site? Need Help?

All times are GMT. The time now is 12:59 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