Quoting Removed, click Modern View to seeThe answer is that I don't know a really good way to tell most folks how to measure one, because of the way they work.
It can be misleading to say it limits the
voltage to the gauge. It averages the voltage to the gauge by switching on and off much like a turn signal flasher. It does not convert 12V to
5V or limit the out put to 5V,,, its on and off time should
average around 5V. If it were on for 1 second at 12V and off
for one second 0V then the average would be 6V. It is not possible to measure this with a digital voltmeter and not even with an analog voltmeter as to rate is too fast for the needle to settle down, but with the analog meter at least you can see the tic-toc going on as it switches. It must have a good ground to regulate properly. If you had an oscilloscope AND KNEW for sure that the average is supposed to be the often quoted 5 volts, then you could arrive at a good measured number, but...........not everyone has an oscilloscope like I do.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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