CAN you dig it?

[Honest Don]

Getting pieces together to play with the canbus capabilities on the MS. Moreso for datalogging various this and that, but ideas are rolling in.

Specifications

Microcontroller: ATmega2560
Operating Voltage: 5V
Input Voltage (recommended): 7-12V
Input Voltage (limits): 6-20V
Digital I/O Pins: 54 (of which 14 provide PWM output)
Analog Input Pins: 16
DC Current per I/O Pin: 40 mA
DC Current for 3.3V Pin: 50 mA
Flash Memory: 256 KB of which 8 KB used by bootloader
SRAM: 8 KB
EEPROM: 4 KB
Clock Speed: 16 MHz

I/O for days!

[pmbrunelle]

Probably a large part of the project will be to cook up a suitable enclosure with connectors/strain reliefs robust enough for (I'm guessing) the cabin of a car.

Will you use the Arduino IDE, or will you be programming on bare metal?

[Honest Don]

Enclosures are pretty easy anymore. I either draw something up from scratch or in most cases, find an existing drawing somewhat close and modify to fit my needs. Not sure what I’m doing for connectors just yet.


I’ve had good success with IDE.

[pmbrunelle]

Oooh, a 3D printer. I'm sure it's a handy tool to have.

[Honest Don]

Oooh, a 3D printer. I'm sure it's a handy tool to have.

Yeah, it’s saved the day on a number of occasions.

[The Dark Side of Will]

For an enclosure, my easy button would be McMaster.

Snazzy stuff; custom CANBus architectures is the future of hot rodding.

There's a WHOLE LOT of documentation out there about GM CANBus, but their modules only do specific things. There's a bunch of profe$$ional motor$port grade $tuff that can do ABS and similar data via CANBus...

I've been curious about doing real time tire temperatures. A bar near the face of the tire could hold IR temp sensors that could give real time inner edge/center/outer edge temperatures. Mount another one in the dust shield reading the surface of the rotor for brake temperatures. Would they work in the rain? Maybe?

[Honest Don]

For an enclosure, my easy button would be McMaster.

Snazzy stuff; custom CANBus architectures is the future of hot rodding.

There's a WHOLE LOT of documentation out there about GM CANBus, but their modules only do specific things. There's a bunch of profe$$ional motor$port grade $tuff that can do ABS and similar data via CANBus...

I've been curious about doing real time tire temperatures. A bar near the face of the tire could hold IR temp sensors that could give real time inner edge/center/outer edge temperatures. Mount another one in the dust shield reading the surface of the rotor for brake temperatures. Would they work in the rain? Maybe?

What about *in* the tire? There’s a video going around where the guy actually managed to fit a gopro on the wheel and mount the tire over.

[FieroWanaBe1]

For an enclosure, my easy button would be McMaster.

Snazzy stuff; custom CANBus architectures is the future of hot rodding.

There's a WHOLE LOT of documentation out there about GM CANBus, but their modules only do specific things. There's a bunch of profe$$ional motor$port grade $tuff that can do ABS and similar data via CANBus...

I've been curious about doing real time tire temperatures. A bar near the face of the tire could hold IR temp sensors that could give real time inner edge/center/outer edge temperatures. Mount another one in the dust shield reading the surface of the rotor for brake temperatures. Would they work in the rain? Maybe?

Hardware to do that is super cheap from china, I may have bought some years ago on small break out boards.
https://www.mouser.com/new/melexis/mele ... ermometer/

[pmbrunelle]

https://www.mouser.com/new/melexis/mele ... ermometer/

A complicated programmable part with a 52-page datasheet (possibly containing errors)... and it's in an old-school metal can.

What about *in* the tire? There’s a video going around where the guy actually managed to fit a gopro on the wheel and mount the tire over.

I suppose that the heating (via friction) and cooling (convection) of the tire tread happens on the outside, so wouldn't readings on the inside be a poor proxy of the external temperature, given the thickness of the tread?

[ericjon262]

I can dig it quite a bit. I'd be very interested in a CAN-bus gauge controller that could drive all of the factory gauges via MS-CAN, thus eliminating all of the redundant wiring in the console. I'm going to try and do this with a microsquirt, but I don't think it will be able to carry all of the gauges by itself.

[Honest Don]

I can dig it quite a bit. I'd be very interested in a CAN-bus gauge controller that could drive all of the factory gauges via MS-CAN, thus eliminating all of the redundant wiring in the console. I'm going to try and do this with a microsquirt, but I don't think it will be able to carry all of the gauges by itself.

There's also the gpio board if you're brand loyal.

I'm mostly using this for additional data acquisition (trans temp, line pressure, coolant pressure, etc.) and maybe drive a few bright idiot lights that will hopefully get my attention before things go too wrong.

[ericjon262]

I can dig it quite a bit. I'd be very interested in a CAN-bus gauge controller that could drive all of the factory gauges via MS-CAN, thus eliminating all of the redundant wiring in the console. I'm going to try and do this with a microsquirt, but I don't think it will be able to carry all of the gauges by itself.

There's also the gpio board if you're brand loyal.

I'm mostly using this for additional data acquisition (trans temp, line pressure, coolant pressure, etc.) and maybe drive a few bright idiot lights that will hopefully get my attention before things go too wrong.

it's definitely something I'm going to start researching soon, I don't think that the microquirt is really ideal for what I want it to do, but it does offer other things that I would later like to implement into my car. when I have the car running, I'll start worrying more about getting the controller developed.

[Honest Don]

300psi sensor from Low Doller Motorsports. $35 and comes with a calibration chart.

[ericjon262]

300psi sensor from Low Doller Motorsports. $35 and comes with a calibration chart.

I'm using these same sensors on my car for fuel pressure and oil pressure, just at 100 PSI and not 300. so far they seem ok.