Post by dave1800 on May 26, 2012 10:46:34 GMT
A plea for a little help with my electronic project please. I want to use the temperature sensor fitted to the cylinder head to drive both the car temperature gauge and as the input to an electronic unit.
The problem is that the instruments on the Landcrabs use a bi-metallic voltage stabiliser that works by switching the supply to the gauge on and off to achieve around 10 volts on average. This will totally confuse the electronics in my box!
I need to know the approximate frequency that this switches under normal running conditions - not with the engine off. The easiest way to do this is to measure the voltage between the temperature sensor and ground with a moving coil analogue meter (not digital) and count the number of times the needle falls over say a 30 second period. I can then buffer the electronics in my unit to smooth this out.
If this means anything to anyone, I'm sure many of you will find it total jibberish, I would be very grateful to hear from you. Sadly I don't have access yet here to a Landcrab to do it myself, but am trying to get as much ready as I can now to keep me amused!
Many thanks in anticipation, David
The problem is that the instruments on the Landcrabs use a bi-metallic voltage stabiliser that works by switching the supply to the gauge on and off to achieve around 10 volts on average. This will totally confuse the electronics in my box!
I need to know the approximate frequency that this switches under normal running conditions - not with the engine off. The easiest way to do this is to measure the voltage between the temperature sensor and ground with a moving coil analogue meter (not digital) and count the number of times the needle falls over say a 30 second period. I can then buffer the electronics in my unit to smooth this out.
If this means anything to anyone, I'm sure many of you will find it total jibberish, I would be very grateful to hear from you. Sadly I don't have access yet here to a Landcrab to do it myself, but am trying to get as much ready as I can now to keep me amused!
Many thanks in anticipation, David
