Quote:
Originally Posted by Tymbrymi
That MAX6675 chip is a good one. A friend used it in his senior design project and it was easy to setup and worked flawlessly.  What micro do you plan on using? And why the USB? Connecting it to a laptop for a display? If you'd like a quick and dirty way to talk to the outside world without the hassle of USB software on the PC check out FTDI FT232R. I've never used USB other than that, so it might be really easy... I just haven't played with it yet so have no idea.
An EGT probe you may want to try is this one . Some folks on the VW forum have had good luck with them, and they are fairly cheap as well.
Keep us posted!  |
I'm using a Microchip
PIC18F4553, it has a built in USB serial port device that can be accessed easily from C code. I'm making a Car PC out of parts of a broken media center PC (mini-ITX) I got for free. The screen is going to be mounted in a hollowed out sun visor and heres a preview of the display I'm working on...
If I can find a good way to read a thermistor and calculate out the extreme non-linearity, I'll be making one for oil and tranny temp, and I'll probably be making ones for oil/tranny pressures too, using these things makes adding gauges so cheap, I can't believe noones thought of it before... The only parts I can't get as free samples or junkyard parts are the circuit board and thermocouple, the rest is in software...