Quote:
BigKev wrote:
They make micro arduino boards that have various pins that can be used for input and output. They are cheap also, like $10. But with some code you can program them to accept certain ranges and then trigger output pins
That's true, and not a bad idea. I've used Ardunios many times in the past. And an Arduino Nano has the necessary ADC on it to process an input of variable resistance. The main drawbacks are that it can't be standalone. It needs:
- power supply (6-15V to 5V)
- precision voltage divider for the input
- output driver, since the 20mA per pin of the Arduino is only about 1/25 of what's needed to drive the gauge reading.
Also, while programming these is simple enough, it could be a benefit to sell something the user can just set up and trim themselves. Of course you can add some pots to the Arduino but at that point you may as well make a custom daughterboard. And then we should consider an enclosure for it...
This really shouldn't be terribly hard with a few op amp circuits combined. Will have to play with it but have been under the weather today, so not been on my PC.
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