I have hit a bit of a roadblock on my latest project. I am trying to use an Arduino to drive the Speedometer and Tachometer from a 92 Acura Legend. I purchased the dashboard from E-bay, and dismantled it to find that the gauges are actually controlled via 3 contacts marked SIN/COM/COS. I had assumed incorrectly that the gauge was a simple spring resistance volt meter. Frustrated I sent the whole project aside...
I was able to find this:
But have been unable to find the chip for sale (for a reasonable price).
So here I ask for some help, I simply do not know where to begin. I get the feeling that this is not going to be as simple as driving the SIN and COS point with but I really don't know.
We did something similar where I work a while back. I will see if I can get some details. I remember it was a pain to get those gauge driver's working but it can be done. I might be able to help with the chip also.
Sorry for the delay, the part numbers for the gauge drivers I got from my buddy at work are as follows. He did the figuring out on this one so this is all I have I am afraid.
CS4122XDWF24 IC DRIVER TRIPLE AIR CORE 24SOIC
CS4192XDWF16 IC DRIVER AIR CORE SINGLE 16SOIC
CS8190ENF16 IC DRIVER AIR CORE SINGLE 16SOIC
As my friend reminded me he had a time of it finding out which pin needed +sin -sin etc. You may need to work all of the permutations. Try Digikey for the parts. Good luck.
If by "for a reasonable price" you mean "less than $3", I wouldn't expect much; ONSemi's budgetary price is $2.0933 so unless you're picking up 10,000 or more, expect some markup.
So, I would like to be able to say that I have been hard at work on this one. But no such luck. This particular project has been put on the back burner.
I will be sure to post what I know when I know something. Thanks to all the positive responses.
