GI: "YarGauge" replacement clock module (Digital Tach, etc.)

[CTScott]

If there's enough interest for non-left hand clock people, I'll just offer a "packaged" option, where the device is in a plastic box like a ScanGauge.

[IsLNdbOi]

Originally Posted by CTScott

If there's enough interest for non-left hand clock people, I'll just offer a "packaged" option, where the device is in a plastic box like a ScanGauge.

If this turns into a an external device (like smaller version of the ScanGauge) and turns out it's not going to be a replacement for the digital clock, then count me out.

Also, to get outside temps. you'll need to sell a thermometer probe like the kinds used with Gentex and CIPA rear-view mirrors that show outside temps., right?

[CTScott]

Originally Posted by IsLNdbOi

If this turns into a an external device (like smaller version of the ScanGauge) and turns out it's not going to be a replacement for the digital clock, then count me out.

Also, to get outside temps. you'll need to sell a thermometer probe like the kinds used with Gentex and CIPA rear-view mirrors that show outside temps., right?

For the right hand clock clusters, there's no place within the cluster to mount it (without cutting plastic). My original thought with this whole thing is that it would really be for the tachless people. It started off as simply a tach in place of the clock and then the more I thought about it the more features that kept popping to mind.

Correct on the sensor probe for outside temp (although if I can figure out the CAN messaging for the A/C ECU, I can use it's outside temp probe and save people having to run a probe wire through the firewall).

I am making great progress on this. I built a CAN bus interface this week and can read the PIDs (all of the standard OBD data), can read and reset stored DTCs, and can sniff the communication on the CAN bus between the ECM and the body ECUs.

[1NZYaris1]

Progress, is good , you so need a Yaris Medal of Honor

[yarstar]

Originally Posted by CTScott

I built a CAN bus interface this week and can read the PIDs (all of the standard OBD data), can read and reset stored DTCs, and can sniff the communication on the CAN bus between the ECM and the body ECUs.

I don't even know what any of that means, but you sure sound like you do! I am so excited about having a digital tach in my OEM cluster! Keep up the good work!

[yappari]

Originally Posted by CTScott

For the right hand clock clusters, there's no place within the cluster to mount it (without cutting plastic). My original thought with this whole thing is that it would really be for the tachless people. It started off as simply a tach in place of the clock and then the more I thought about it the more features that kept popping to mind.

Correct on the sensor probe for outside temp (although if I can figure out the CAN messaging for the A/C ECU, I can use it's outside temp probe and save people having to run a probe wire through the firewall).

I am making great progress on this. I built a CAN bus interface this week and can read the PIDs (all of the standard OBD data), can read and reset stored DTCs, and can sniff the communication on the CAN bus between the ECM and the body ECUs.

Are you by any chance using an Arduino for the microcontroller for all of this or are you programming your own PIC? I've recently started ordering some electronics to do something similar but probably not as sophisticated as what you're planning. I've read that an ELM preprogrammed pic is great for interfacing with the CAN bus, but it seemed a little costly and difficult to use. I asked an electric engineer where I worked (I used to work as a plastic engineer at the Corolla plant) and he said that I shouldn't have a problem interfacing with the ISO bus for Toyota cars if it's a cheaper/easier solution. I've got all the parts but the programming is still killing me even in this with the easy platform of the Arduino though, I'd like to keep hear about your progress though. Please keep us updated

[CTScott]

Originally Posted by yappari

Are you by any chance using an Arduino for the microcontroller for all of this or are you programming your own PIC? I've recently started ordering some electronics to do something similar but probably not as sophisticated as what you're planning. I've read that an ELM preprogrammed pic is great for interfacing with the CAN bus, but it seemed a little costly and difficult to use. I asked an electric engineer where I worked (I used to work as a plastic engineer at the Corolla plant) and he said that I shouldn't have a problem interfacing with the ISO bus for Toyota cars if it's a cheaper/easier solution. I've got all the parts but the programming is still killing me even in this with the easy platform of the Arduino though, I'd like to keep hear about your progress though. Please keep us updated

I'm using two PICs within the design. One dedicated to the CAN Bus communication and the other for the user interface, direct RPM sampling and temp input.

The ELM PIC is way too expensive at $23 each. I built a code reader for ISO-9141 (K and L line comm) about ten years ago. The messaging for the CAN bus is very similar to OBDII, so most of my work thus far was redoing my hardware interface for CAN.

[yappari]

Originally Posted by CTScott

I'm using two PICs within the design. One dedicated to the CAN Bus communication and the other for the user interface, direct RPM sampling and temp input.

The ELM PIC is way too expensive at $23 each. I built a code reader for ISO-9141 (K and L line comm) about ten years ago. The messaging for the CAN bus is very similar to OBDII, so most of my work thus far was redoing my hardware interface for CAN.

WOW! you're programming your own CAN pic?? ok that's way beyond me. I took a look at doing that and it was too complicating; NRZ coding, bus arbitration, bit timing, etc, it's just too much, lol.
well it's expected, it's really more of a hobby thing and i'm no CS major. But i have one way I can help out.. I've got a few ideas for making a attachable design; hopefully a design that would cost >5bucks worth of laser cut parts and possibly less in bulk. If you want to go with larger 2x24 or 2x16 LCDs instead i think it would be easy to make a housing and attachment clips for it. it may be a little more costly through this route but i think it would make a world of difference