automotive electronic project

[Tom5339]

Looking for ideas on a curcuit that I can monitor the output of a 5 volt DC sensor. It has to be adjustable, when the sensor reads a set voltage or higher it turns on a 12 volt automotive relay. Anny ideas would be greatly appreciated.

 

[raviram87]

may b u can tru using a comparator such as the lm339....

 

[Hero999]

I'd use the LM311 myself as it's output can directly drive small relay.

Some good sites with information on comparators.

**broken link removed**
**broken link removed**
http://www.google.com/search?num=100&hl=en&client=opera&rls=en&hs=LJ5&q=comparator&btnG=Search

 

[ericgibbs]

hi,
Look at this forum thread.

https://www.electro-tech-online.com/threads/need-to-sense-and-alarm-4vdc.37556/

 

[Tom5339]

Thanks for all the links and info, looks like good stuff!