HVAC Control on Car PC through Serial Port.

**Blue ZX3** · 05-26-2005, 02:30 AM

Thats what I was thinking with my idea...would prob req a whole board by itself to to get it to work right...

**gyro** · 05-26-2005, 02:33 AM

Mastero, if all works as you stated and your pc fails, you can sense that too I suppose. That way you can eliminate the remote and go back to basics with a few relais that only switch off the original (factory) setup of the AC if the pc is out ? BTW another nice development

**Mastero** · 05-26-2005, 09:33 AM

Wizard how is heat controlled in my car its with a flap which sends the air through the coil heated with engine coolant.

Chris I am trying to find cheap programmable remote ...

no hardware yet

Gyro if pc fails and you have not powered the unit with your PC power suply then it stays on else it powers off .. for the reomte to work the unit needs power when pc not on ..

The new PCB design is ready ... size is 152mm x 88mm single board. Shall post pics when the new pcb is ready.

As for the vacuum thing .. need more info guys .... just wondering how can vacuum air change fan speed..?

cheers
Mastero

**lostreception** · 05-26-2005, 10:39 AM

Originally Posted by Mastero

As for the vacuum thing .. need more info guys .... just wondering how can vacuum air change fan speed..?

cheers
Mastero

I have something similar in my Van the fan speeds initially are controlled by vacuum but those vacuum switches eventually power on regular switches you would just need to bypass the vacuum circuit

**Wiredwrx** · 05-26-2005, 01:13 PM

Originally Posted by Tuckie

a servo would be so much easier to use than a linear actuator

Yes, a servo would be easier to control, but I don't think will have enough torque to make the dials change. I may be wrong, but in my last car, it was more difficult then I thought it should be to make changes on the dial. An actuator should be more then strong enouh to move the cable.

Now, the person who wrote that long description of how his car worked. That is gonna take me some time to conceptualize, but I will do my best. Unfortunately, I have a lot to do at work, so it might take some time.

Michael

**Blue ZX3** · 05-26-2005, 01:22 PM

Originally Posted by lostreception

I have something similar in my Van the fan speeds initially are controlled by vacuum but those vacuum switches eventually power on regular switches you would just need to bypass the vacuum circuit

Fan speed controlled by vacuum???

Thats a little strange...

The fan is almost always somekinda actual switch(s)...I yours works like you said then you might be able to just use the regular switches to tap into...don't know

**Chris31** · 05-26-2005, 01:29 PM

I think alot of poeple will have problems attaching a servo/actuator to the control knob/shaft.

The controller must know how much to turn the servo/actuator by as well as how many stop positions. Attaching and mounting the servo can be a problem to most, non of them would be standard the way they work.

Not to put off you guys, I can just see problems comming in making a universal AC controller...it can be done though.

**Blue ZX3** · 05-26-2005, 01:32 PM

Can't say too much as I have not quite ventured down that road, yet! Mine are done by a 2 way cable...much better desgned than the single cable ones...

**Blue ZX3** · 05-26-2005, 01:35 PM

I am thinking about a way to be able to use both the oem ones and have it on auto...it just a matter of making sure that the software would know the positions of everything and adjust accordingly...

**gyro** · 05-26-2005, 01:41 PM

<quote>
Gyro if pc fails and you have not powered the unit with your PC power suply then it stays on else it powers off .. for the reomte to work the unit needs power when pc not on ..
</quote>

I know, but if this goes on like this we have to buy a bigger car to store the remotes