Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-08-2014, 13:27   #1
Registered User

Join Date: Jul 2009
Location: Ontario, Canada
Boat: Niagara 31
Posts: 252
Circuit Needed for Alarm Light

I'd like to add an alarm light to my control panel so that if the alternator stops charging (e.g. if the fan belt belt breaks), the light will come on.

I've seen the circuit before somewhere, but can't remember it. I think, you have to apply +12v from the battery to one side of the light, and the positive output from the alternator to the other side, so they cancel out when everything is fine, but the light goes on when the 12v is not coming from the alternator, or something like that.

Can any electrical wizard help me out please ?
__________________
macbeth is offline   Reply With Quote
Old 04-08-2014, 13:47   #2
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,029
Re: Circuit needed for alarm light

You'd need to start with a circuit diagram of your electrical system since they are "all" different. If your alternator was a conventional "3 wire" like a car, there's already a circuit that lights a light when the alternator fails. If you don't have that...you've got to find out what you have to consider options.
__________________
hellosailor is offline   Reply With Quote
Old 04-08-2014, 14:13   #3
Registered User

Join Date: Jul 2009
Location: Ontario, Canada
Boat: Niagara 31
Posts: 252
Re: Circuit needed for alarm light

Quote:
Originally Posted by hellosailor View Post
You'd need to start with a circuit diagram of your electrical system since they are "all" different. If your alternator was a conventional "3 wire" like a car, there's already a circuit that lights a light when the alternator fails. If you don't have that...you've got to find out what you have to consider options.
Now let me try and remember ! The alternator, which can output 80amps, has a big fat output terminal. It has a field line, which is green in colour. It has an earth line, I think it might have a line to the rev counter.

Hmm ! I'll have to check when I go down to the boat tomorrow or Wednesday !

Thanks, that a start.
__________________
macbeth is offline   Reply With Quote
Reply

Tags
alarm

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
light alarm on AIS Stranizza Navigation 0 02-07-2013 11:16
car alarm as boat alarm? arjand Health, Safety & Related Gear 2 12-01-2013 04:31
Inexpensive High Water Alarm (and boat alarm) kiltym Marine Electronics 2 04-11-2012 10:22



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 01:43.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.