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My self-made tachometer


Max

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Hello together,

i want a tachometer in my F100, but it has the cluster with warning lights and the 1980 blue printed circuit.

The conversion are to expensive for me (complete cluster, new wiring, sending units...)

Now I've experimented a little with Arduinos and the result is a self-built tachometer that is flat enough and fits directly into the cluster.:nabble_anim_confused:

The task wasn't easy for me and I didn't know if it would work.

Here are a few pictures:

The first tests with Arduino, a h-bridge, a X27-168 gauge stepper and a signal conversion board.

tacho8.thumb.jpg.46c2721e6ebf8053cf68743725221062.jpg

After a lot of try and error i put it together.

tacho6.thumb.jpg.82808388e1da1e96754d6b163904446c.jpg

tacho3.thumb.jpg.010b3fd09bf748c5e92d5a3ea9c1691c.jpg

At next i put the gauge stepper in the original cover.

tacho7.thumb.jpg.f235a5593606b6e0ed0703869fe8fe9a.jpg

tacho5.thumb.jpg.41f55507b2aeeec81b1d224cb30913d8.jpg

Does anyone need a number?:nabble_smiley_grin:

tacho2.thumb.jpg.6057b820c8f878db01bcf0d340a5196e.jpg

The needle was carved from a piece of plastic.

tacho4.thumb.jpg.63bf3bd59c5af3e9e48bceca5839379e.jpg

Here the problem, no space!

tacho1.jpg.b7e88f936d93cbc16257d7ec5cb216d2.jpg

but it fits

tacho9.jpg.ce60ffce4f535811b9dde87aed011123.jpg

and work.

tacho10.jpg.724239843b277421414a5a34bab3d838.jpg

The best of all:

Arduino pro nano 3$

X27-168 stepper 7$

H-Bridge drv8833 3$

Numbers 12$

resistors, cables transistors around 5$

adds up -30$ :nabble_anim_jump:

Cory, many thanks again for your original 4500rpm Tacho, i hope it's OK if i sell it again (in Germany).

have a nice day everyone

Max

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Max, that is flat out ingenious! Thanks for sharing. And, as Gary mentioned, would you mind posting up a how to on this, specific to parts and such?

big thanks :nabble_smiley_happy:. I will summarize everything, part numbers, circuit diagram and the sketch and then put it online for everyone.

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