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Author: Subject: Strip type led tacho
Shooter63

posted on 17/12/19 at 09:54 PM Reply With Quote
Strip type led tacho

Evening all
I thought I would ask on here as you guys seem to know everything, I'm looking for a strip type tacho, one with multiple leds , 1 lights up at 1000rpm 2at 2000rpm etc. It needs to be pretty small as it's going in a mk1 mini that I want to keep standard looking as possible

Cheers

Shooter

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rf900rush

posted on 17/12/19 at 10:53 PM Reply With Quote
Google "LM2917N tacho" might point to something.

I made a more complicated one a few years back using a Microprocessor.

Main bit is to get a clean signal from the ignition.


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SteveWalker

posted on 17/12/19 at 11:57 PM Reply With Quote
LM2907N or LM2917N to convert frequency to voltage and LM3914 to convert voltage to a 10 segment LED bargraph?

Incidentally, IIRC, LM3914s can be cascaded to produce longer displays.

[Edited on 17/12/19 by SteveWalker]

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adampage

posted on 18/12/19 at 11:31 AM Reply With Quote
Does this work?


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adampage

posted on 18/12/19 at 11:33 AM Reply With Quote
Does this work?

I used to have just what you're describing, i think it was 8 or 10 LEDs, only about 8mm deep and in a flexible rubber case so you could apply it on a curve or in a groove, etc, and i thought it was made by SPA, so but i can't find one for sale online anywhere....

So the nearest i could find was this one

https://www.ebay.co.uk/i/123879355992

Good luck!

thanks
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adampage

posted on 18/12/19 at 11:41 AM Reply With Quote
Or this one?

Only 20!

https://trigger-wheels.com/store/contents/en-uk/p295.html

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gremlin1234

posted on 20/12/19 at 09:17 PM Reply With Quote
Julian Ilett tried building something very similar.
this is his third iteration...
https://www.youtube.com/watch?v=8vOPylh78EY

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