Service Light LED to Revs conversion - interest?

[Grrrmachine]

I stumbled across the info to do this today, and it reminded me of a guy (American?) who had tried to sell his home-made version for big money, and failed.

The premise is a board that replaces the existing Service LEDs inside your cluster with one that glows with your revs. It'll be a bit home-brew but should be plug-and-play.

Is there any interest in this? If so, what sort of price would you pay for it? Not trying to make a business out of it, but wondering whether it's worth my time to make a handful.

[ross_jsy]

What, more LED's light up with more revs? Isn't there already a far better instrument located in the clocks for doing this already rather than a couple of small LED's?

[Grrrmachine]

Oh of course there is. It's just a gimmick, but it's one that people showed interest in in the past.

[Rav335uk]

Could you not make on to fit the Rev counter???.....

[Speedtouch]

It was georgegraves who came up with some design to replace the SI lights, though I don't think it was a rev counter - wasn't it a battery voltage gauge or similar?

As said above, what's the point when you already have a perfectly good rev counter, unless you own a lowly 316 carb model, that is, which didn't come with the rev counter?

Gear shift indicator lights that respond to revs would be a more useful function, or an AFR gauge.

[Quaser]

i wouldnt mind something like that - but it would have to retain the si functionality too before the car started

[polsta]

[Grrrmachine]

As said above, what's the point

I'm not doing it to mine; I just found the circuit diagrams alongside something else I needed. If no-one's interested, I can pack my soldering iron away

I think the site I found it on was for the BMW 2002 lot, who fit E30 engines and then customise the original 2002 gauges to make it all work.

[Nick45]

As said above, what's the point when you already have a perfectly good rev counter, unless you own a lowly 316 carb model, that is, which didn't come with the rev counter?
.

316 m10s do have rev counters mate.

[Rav335uk]

As said above, what's the point when you already have a perfectly good rev counter, unless you own a lowly 316 carb model, that is, which didn't come with the rev counter?
.

316 m10s do have rev counters mate.

Yep, if it's the 1.8 carb'd one.
Mine does too.

[milescook]

Would be awesome in my track car... I'll take one please, would a beer suffice?

[Speedtouch]

As said above, what's the point when you already have a perfectly good rev counter, unless you own a lowly 316 carb model, that is, which didn't come with the rev counter?
.

316 m10s do have rev counters mate.

Some early chrome bumper 316 carb models didn't have them, just a clock as standard, mate.

[Nick45]

As said above, what's the point when you already have a perfectly good rev counter, unless you own a lowly 316 carb model, that is, which didn't come with the rev counter?
.

316 m10s do have rev counters mate.

Some early chrome bumper 316 carb models didn't have them, just a clock as standard, mate.

Lovely. We're both right

[miniblob]

It was georgegraves who came up with some design to replace the SI lights, though I don't think it was a rev counter - wasn't it a battery voltage gauge or similar?

It was a voltage indicator!!!
I'd be interested in a volts gauge there - but to be honest, I can't be arsed to do it!!!!

[Speedtouch]

It's a pretty straightforward circuit, using an LM3914 bargraph driver chip, and a few external parts:

http://www.electronicecircuits.com/elec ... or-circuit

[fearlessphil]

Id be interested in it! would be good if you could tune it as a gear shift indicator!