HVAC Control on Car PC through Serial Port. - Page 30

Mastero · 10-18-2006, 07:48 AM

Check post 375 and 381

Cheers
Mastero

h3rk · 10-31-2006, 01:04 AM

This is one of the longest threads I have read so far, and for good reason. I want one. There is only one thing I've got reservations about. I live and Las Vegas, NV. USA. I'd like to try the LM34 method for F vs. C, but much of the year here, it's over 99F, in fact in car temps reach around 150F. I see the 8 segment display is 2 digit. Is that the only limitation to 3 digit temp display. Can the UI be modified to display three digits? Or, is this a harware limit, prior to sending this data to the serial port? I figure I could find a harware solution interface the 8 seg display. Which leaves me with the software/serial side, wondering... can it be done?

EQNish · 10-31-2006, 04:00 PM

I hvae been thinking about this, and I believ I remember Mastro saying that the software was written in VB, if so we could add a few lines to do the conversion and desplay F on the LCD, the LED (which I would not even hook up) would still read C if it is not controlled by the front end, but by the board/thermal sensor

h3rk · 10-31-2006, 04:24 PM

That would sell me on the whole deal. Converting C to F in the software wouldn't require any more information or the LM34. Correct?
And I gather that there are no variable inputs in the upgrade. I would like to control a factory servo amplifier as seen in the drawing below, and have more than a preset number of temps to work with. The software could have a linear proportionality setting, using max and minimum volts and temps.
And:
Can the 9 outputs be used in place of the servo outputs in aircon2? e.g. to discreetly control individual vacuum solenoids. Will the software support that?
It would be nice to have another variable output for blower control (bypassing the resistor divider network), to get that modern 'soft start' and ramp effect.

I have similar drawings and HVAC vac diags for most pre-2004/post-1985 applications. if the requests don't get out of control. Just pm or email me. Please, this thread is long enough, as-is, I will not reply to public requests for such in mastero's thread.

rayrayleonard · 11-01-2006, 06:05 AM

If you have the schematics to a 1998 Cavalier z24, I could really use those. I tried to send you an email. Not sure if you got it

Happy Holloween eveyone (So I'm a day late and dollar short!)

Mastero · 11-03-2006, 06:51 AM

Comming very very soon..... just doin a few last tests and getting the manual ready...! Mostly this will be in KIT form only for now .. !

Cheers
Mastero

Jamskate · 11-03-2006, 10:25 AM

Ok so I've read all 30 pages and still have questions?(Big surprise)

1.How well will this work with a completely digital climate system?

2. Has anyone tryied embedding this in Centrafuse yet?

3. I want to make sure I understand something about the software. You have to press the "On" button for it to work and you can't exit with out pressing "off"? This come back to centrafuse, will it remember the last setting before you turned off the car? If its embedded in centrafuse can I turn it on make setting and switch to say DVD without turning it off?

Well 3 turned in to like 3, 4, & 5 but hey we don't learn if we don't ask.

Thanks
Jam