Car Dash mounted Multigauge

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BennehBoy
Posts: 135
Joined: Sat Jan 04, 2020 2:38 am
Answers: 1

Car Dash mounted Multigauge

Post by BennehBoy »

Dusted off this old project again.

I'm adding some more instrumentation to the vehicle - a Land Rover:

Gearbox oil pressure
Gearboc oil temperature
Transfer box oil temperature
Engine oil pressure
Engine oil temperature

Anyhow, the currently running system is built using a Maple Mini clone, unfortunately that doesn't have enough analogue inputs for me to hook up all the sensors - I'm using SPI 1 with an SSD1306, & SPI 2 with a Max31856 thermocouple chip - the libraries for them don't play well together so I can't condense things onto 1 bus.

This means I've dusted off an FK407M1 since it has a lot more ADC for the size of the package - scratched my head for a bit when I couldn't build my project, when I submitted the variant to the core I must've removed the SDIO support... crufted that back in and SD working again.

Spent a fair part of the day refactoring my horrific coding, cleaning up the graphics drawing and adding another graph type.

Also removed all the OBD code as I _never_ use it in the vehicle, it simplifies the electronics a fair bit too - no K line conversion required.

I'll probably slim down all the cross board compatibility in the code before updating the repo - I doubt anyone but me is actually using it anyway :D

github repo -> https://github.com/BennehBoy/LRDuinoTD5
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fpiSTM
Posts: 1738
Joined: Wed Dec 11, 2019 7:11 pm
Answers: 91
Location: Le Mans
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Re: Car Dash mounted Multigauge

Post by fpiSTM »

Thanks for sharing. Nice to have some news ;)
BennehBoy
Posts: 135
Joined: Sat Jan 04, 2020 2:38 am
Answers: 1

Re: Car Dash mounted Multigauge

Post by BennehBoy »

I built myself a rats nest....

Image

This proves each of the sensor types work - with the exclusion of an earth switched coolant level sensor that I'll incorporate tonight.

You can see on the display that the max31856 is supplying the room temperature from the K-type - it's not super accurate, but close enough and proves it's working.

After that I'll get this all onto stripboard for the one off build that's going into the vehicle.
zippie
Posts: 1
Joined: Thu Mar 24, 2022 4:36 pm

Re: Car Dash mounted Multigauge

Post by zippie »

Cool project. any more progress on this?
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