Dear All,

I am developing a device which can provide advance warning for engine overheating and low oil pressure in engine.

Though both warning indicators are available in the cars, it is not audio able where driver can miss the warning.

I am looking for a simple circuit which can be connected to both outputs to give a warning buzzer. It should also not interfere "Electronic Control System" of the car.

Thanks in advance.

Best regards,

VIJAY

 

And this is Homework?

Unfortunately, any discussion of automotive modifications are strictly forbidden by the ToS of this forum. Look at the sticky at the top of the General Electronics Discusion thread list and you will find a list of other forums that welcome such discussions.

http://forum.allaboutcircuits.com/showthread.php?t=53904

 

http://en.wikipedia.org/wiki/Engine_coolant_temperature_sensor

This describes the engine coolant sensor. I've not seen the specifications on that type sensor yet.