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RejsaRubberTrac
RejsaRubberTrac - Build thread, RX7 FD3S
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scornflake

Här sen Jun 2022
Inlägg: 10


Trådstartare
Hello all, thought I'd share my build with you all.

As I write this I've already done quite some work/research.
But first, my goals:

- I don't want to think about batteries. ever. so I'm wiring it in.
- I do want to be able to replace lens covers.
- For ideal sensor location on an RX7, it needs to be under the front guard. That means I need a way to have replaceable/cleanable sensor covers.

I wish it was as easy as the BMW M2, but nope .
The sensor I think should be placed over the top of the tyre; minimizing distortion from steering travel or "aiming". By "aiming" I mean pointing the sensor at the tyre from a location that isn't direcly above said tyre..

So I've *tried* to get it above.
Mine isn't perfect. And *after* I got 55/60 deg sensors I realized I probably want 120deg. But ohwell. *something* is better than nothing.

So for now I'll run sensors almost directly above the tyres; in a custom mount.
These feed to the adafruit nrf52's on the passenger side (fronts only for now).

I'm driving it all with a simple buck converter. 12-14.4(-ish) v down to 4,127v into the adafruits.

Pics, or it didn't happen right?





I used magic unicorns (photogrametery) to help me build the sensor model. It looks like this: https://www.dropbox.com/s/tvzu999n3kj58ql/RPReplay_Final1656216297.mp4 . . . .

[/img]

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Neil Clayton
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scornflake

Här sen Jun 2022
Inlägg: 10


Trådstartare
The in-car case holds 2 x nrf52.

Input is 12-15v, regulated by the buck conveter.



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Neil Clayton
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scornflake

Här sen Jun 2022
Inlägg: 10


Trådstartare
Here's 2 x nrf52s and a buck converter.

I run wires from the sensors; through the firewall, to somewhere in the cabin.
done!



You can't see it, but the writing on the case says "in case of emegency, pull!"

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Neil Clayton
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Magnus Thomé
Stockholm
Här sen Nov 2002
Inlägg: 39992

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Nice! Really great to see the stuff being built. I've seen Pcbway have sold a lot of the daughte