Amperes, volts, ohms, "blowing" electronic components... - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 15th August 2004, 01:09 PM   #1
diyAudio Member
 
Join Date: Mar 2004
Location: Connecticut, USA
Default Amperes, volts, ohms, "blowing" electronic components...

I'm not sure which forum this is best for, but I'm asking in relation to a car amp.

I think I finally "get" the relationship between watts, amperes, volts, and ohms, but I want to make sure before I potentially fry something if I hook it up wrong.

If comparing electrical flow to water flowing through pipes...

volts = water pressure
ohms = restriction of pipe (e.g. diameter)
amperes = amount of water that actually flows (current)

I think this means, voltage doesn't "make" current flow, a high resistance could block it. You don't "apply" current, you apply volts, and current is "drawn" based on resistance.

Is that about right? If not, please enlighten me.

I think that means that you don't have to worry about supplying too much "current" to a component, right? You don't "supply" current, you supply voltage, and the component "draws" current based on it's resistance. Is that right?

OK, now my question:

For the 12 volt remote turn-on terminal of a car amplifier, which doesn't require much current, and has a much smaller connecting terminal than the 12 volt power terminal, would it be dangerous for testing purposes (testing the amp before installing it properly) to directly connect the remote turn-on terminal to the same wire as supplies the amplifier's power? Would that fry the amplifier? Would a resistor in series with this connection be required, or would that drop the voltage too low?

Still a little confused, and haven't been able to find this info anywhere.
  Reply With Quote
Old 15th August 2004, 01:50 PM   #2
diyAudio Member
 
li_gangyi's Avatar
 
Join Date: Jun 2003
Location: Woodlands Circle
yes...you should be able to use 12V to trigger the remote...
__________________
Kids in the back seat cause accidents...Accidents in the back seat cause kids...
  Reply With Quote
Old 15th August 2004, 02:27 PM   #3
diyAudio Member
 
Join Date: Apr 2004
Location: austin and lobbuck, texas
Send a message via AIM to trailsnail85
yea you can use a peice of wire and run it into the terminal with the power wire and the amp will turn on. friend does this with a swicth on the jumper between the power and remote an uses that to turn on the amp. hes a to lazy to run a remote wire right.
  Reply With Quote
Old 17th August 2004, 12:13 AM   #4
diyAudio Member
 
Join Date: Aug 2004
Location: So. Cal
Correct ... The remote turn-on accepts 12v ... It will draw the current it needs.
  Reply With Quote
Old 17th August 2004, 02:15 AM   #5
diyAudio Member
 
xplod1236's Avatar
 
Join Date: Dec 2003
Location: On the couch
Send a message via AIM to xplod1236
Quote:
Correct ... The remote turn-on accepts 12v ... It will draw the current it needs.
Just out of curiosity, how much current does it usually draw (average amplifier)?
  Reply With Quote
Old 17th August 2004, 02:32 AM   #6
Immo_G is offline Immo_G  Australia
diyAudio Member
 
Join Date: Sep 2003
Location: Vic, Au
Should be under 200ma, and probably around 40-50ma. You can use thin wire for this, not sure why some amps have the 8ga spot for it.
  Reply With Quote
Old 17th August 2004, 03:19 AM   #7
Tensop is offline Tensop  Lebanon
diyAudio Member
 
Join Date: Jul 2003
Location: Chapel St.
Cost management
Cheaper to buy a 3 terminal 8 guage socket than a 2 terminal 8 guage socket and a 22 guage socket


  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
Speaker components "Inbound into customs" for almost 4 weeks runethechamp Everything Else 5 14th April 2009 04:27 PM
"Multicomp" components : are they worth it? Nidec Parts 3 11th February 2007 05:35 PM
The "How much will you pay for these (surprisingly useful) components?" thread. Spasticteapot Swap Meet 3 12th April 2006 03:44 PM
WTB: Focal & Audiom & Volts 11", 12", 13", 15" woofer gengis Swap Meet 0 17th March 2005 02:29 AM
New "Fake Components Forum" ashok Everything Else 3 9th May 2004 02:30 AM


New To Site? Need Help?

All times are GMT. The time now is 08:09 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