SailNet Community - View Single Post - Aftermarket oil pressure and temperature alarm.
View Single Post
post #3 of Old 06-21-2008
Senior Member
Join Date: Sep 2006
Location: Scotland
Posts: 2,365
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 11
I made an oil pressure alarm from an old Mazda oil pressure switch, an old BMW relay, and an old automobile horn.

Total cost... about $5, back in 1992.

It still works, 15 years on, and would waken the dead.

This is the schematic...

Image of oil pressure switch alarm with relay - Photobucket - Video and Image Hosting

You can wire it in an afternoon, and if anything fails, pull another bit from an old car, and stick it in there.

Remember to fuse the circuit. Use an in-line fuse. They work fine.


Last edited by Rockter; 06-21-2008 at 10:40 PM.
Rockter is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome