Anyone know what this board is?

Information and discussion of EFI hardware and specifications
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Anyone know what this board is?

Postby Toyota 5Lt surf » Sun Jun 07, 2020 12:58 am

Hey guys, i picked up a loom and ecu from a vs manual the other week, and today when i was checking the loom over i came across this little guy. Not sure what it is, what its for, or if its needed. Is it a BCM sim? It was wired in near the ecu/aldl plug.

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Re: Anyone know what this board is?

Postby j_ds_au » Mon Jun 08, 2020 1:45 am

Well, it's some sort of divide-by-ten circuit. It has a pulse train input (which might not be a square wave), feeding a transistor amplifier, thence a 4017 divider IC, feeding a transistor/MOSFET output stage with pulse-by-pulse current-limiting protection.

Joe.
Last edited by j_ds_au on Tue Jun 09, 2020 1:21 am, edited 1 time in total.

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Re: Anyone know what this board is?

Postby delcowizzid » Mon Jun 08, 2020 10:44 pm

Could be a speed signal convertor possibly
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Re: Anyone know what this board is?

Postby RVK355 » Tue Jun 09, 2020 7:48 pm

in a little black plastic cover?

speedo signal converter, from a VS getrag loom

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Re: Anyone know what this board is?

Postby vp304 » Fri Jul 17, 2020 12:32 am

Maybe a factory 215kw vr vs hsv 6 speed manual car. That the wiring come from
I heard these ran some kind of speedo converter from the factory

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Re: Anyone know what this board is?

Postby antus » Fri Jul 17, 2020 4:46 pm

Sounds like they're on the money above. Def not a sim (even though it says VT Sim on it), as there is no processor in there for any kind of digital logic or comms, just a good old analog circuit.
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