additional analog inputs

[Olaaf]

Hi All

What is the best way to get a bunch of additional analog inputs? Will it be possible to chain together multiple race capture pro units with CAN in a future firmware revision? I'm looking at 12 analog inputs for tire IR temps..

As an alternative, in the megasquirt world we use these- CAN enabled and tons of inputs and outputs for cheap:

http://www.jbperf.com/io_extender/index.html

thanks

[GameboyRMH]

I would say you should look at either multiplexing the inputs, or using a separate microcontroller to read the temperatures and pass them to the RCP through the expansion port.

[Mulry]

Hi All

What is the best way to get a bunch of additional analog inputs? Will it be possible to chain together multiple race capture pro units with CAN in a future firmware revision? I'm looking at 12 analog inputs for tire IR temps..

As an alternative, in the megasquirt world we use these- CAN enabled and tons of inputs and outputs for cheap:

http://www.jbperf.com/io_extender/index.html

thanks

We were talking about this on the drive home from Barber this weekend. What sensors do you think would work best? And then I guess it's about finding a good place to mount them where they wouldn't get destroyed. Hmm.

[GameboyRMH]

You might want to check out this thread on the idea of a tire pyrometer array:

http://www.autosportlabs.org/viewtopic. ... sc&start=0

[brentp]

Hi, the CAN bus interface we are releasing soon (firmware being developed now) would be ideal for integrating with sensor expanders.

http://www.autosportlabs.com/racecaptur ... interface/

Not just for OBD2!

[Mulry]

Hi, the CAN bus interface we are releasing soon (firmware being developed now) would be ideal for integrating with sensor expanders.

http://www.autosportlabs.com/racecaptur ... interface/

Not just for OBD2!

Brent, assume that we will want to use it for OBD2. Will it support simultaneous input from the OBD2 interface and the CAN bus so that we can use both (in order to get the tire temp data into the telemetry stream)? I sure hope the answer is yes, as the new project we're starting for the fall Lemons race at Houston will finally have an OBD2 port, but we want tire heat data too. Cheers.

[GameboyRMH]

Hi, the CAN bus interface we are releasing soon (firmware being developed now) would be ideal for integrating with sensor expanders.

http://www.autosportlabs.com/racecaptur ... interface/

Not just for OBD2!

Nice, that could let my RCP communicate with the MS2x that's going in my car.

[brentp]

Mulry,

It's a single channel CAN bus, it could be possible to insert a CAN node between the CAN-OBD2 port and RCP and have it broadcast messages that RCP could process, providing it doesn't interfere with CAN-OBD2 operation. The ECU should probably ignore messages not destined for it)

Also, ensure your ECU is implementing the CAN protocol for OBD2. See our blog post for more details.