donut
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| posted on 13/10/05 at 08:24 PM |
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Rev lights
I'm after a cheap alternative to the usual expensive rev lights that you get from Demon tweeks etc and i came across this:
http://www.400greybike.co.uk/PR-RevLight.asp
Anyone heard of or has used this system? Looks cheap in that it has no casing and is a simple unit. Could go well and be an easy fit in the dash.
theres another here (american!) http://www.tekniqauto.com/CDN/home.htm
click on T Sport link
Here is a good one and they are available all over.
http://www.datatool.co.uk/consumer/products/products/index.php?pr
oduct=revlight
[Edited on 13/10/05 by donut]
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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shortie
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| posted on 13/10/05 at 08:49 PM |
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They look pretty good mate, quite fancy one behind my wheel!
I thought you were going for the Digidash 2 which has them built in!!
Rich.
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donut
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| posted on 13/10/05 at 08:57 PM |
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Too dear....well not for what it is but for my budget right now. Need other stuff that's more important.
Would motorcycle sshift lights work ok on a car? it's just that the one i'm after says that it's designed for use with motorcycles
fitted with electronic rev counter. Will it be ok to get the pulse from the coil?
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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Surrey Dave
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| posted on 13/10/05 at 09:26 PM |
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And Here.......
Datatool Revlight £58
http://www.robinsonsfoundry.co.uk/shop/index.php/product/datatool/datatool_riderinfo/03000100.html
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Surrey Dave
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| posted on 13/10/05 at 09:41 PM |
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Could be tricky......
a quote from a website describing fitting Datatool Revlights
"For the brown Tach Pulse wire: The tach wire that feeds a pulse to the gauges comes straight off the coil. Datatool says the Revlight will NOT
work with pulses coming off of the coil, and this has been confirmed by others. So, I had to find some other pulse that corresponded with engine
RPM."
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donut
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| posted on 13/10/05 at 09:46 PM |
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Which website Dave? Just bought one from Ebay for £39
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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Surrey Dave
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| posted on 13/10/05 at 09:57 PM |
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This One......
http://www.svrider.com/tips/datatool-revlight.htm
probably best to phone or email Datatool for the best answer......hope you're lucky.
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donut
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| posted on 13/10/05 at 10:08 PM |
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Cheers Dave i'll keep me ear to the ground!
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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Hellfire
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| posted on 13/10/05 at 10:19 PM |
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Theres a shift light on MK's new Blackbird engined indy. Its just a single red light, about the size of a 2p piece, in an aluminium tube about
3" long. Looks cool.
Can't remember where they said it was from though 
[Edited on 13-10-05 by Hellfire]
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donut
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| posted on 13/10/05 at 10:34 PM |
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Yeah that' a huge light!
Anyway i need to know where to get a proper working pulse from a pinto as someone on a bike site said a coil was no good.
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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Lightning
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| posted on 13/10/05 at 10:41 PM |
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I've got the datatool one. Easy to fit and work a treat.
They go up in sequence then everything flashes for you to change gear (ooo errr). Soo much easier. You sent the rev levels. Puker
Steve
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donut
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| posted on 14/10/05 at 06:24 AM |
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Yes but how does it work on a Pinto?
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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donut
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| posted on 14/10/05 at 08:58 AM |
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Found this info on the Q&A page on the datatool website but none the wiser
"I want to fit a Revlight to my machine but it is not equipped with a tacho? »
In certain cases this can still be done but you will need to pick up an engine rev pulse from another source (e.g. crank sensor). Don’t use the coil
the signal will be corrupted by the collapsing field within the coil as it fires the spark plug.
You will also have to accurately set 4000rpm. Good quality dwell meters and ignition timing strobes sometimes have a revs indicator. Be aware most of
these are set for 4 cylinder car engines and you may have to apply a correction factor depending on the configuration of your machine. "
Where can i pick up the pulse from?
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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mark chandler
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| posted on 14/10/05 at 09:03 AM |
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Pinch a source from the alternator, same as a diesel car.
Regards Mark
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donut
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| posted on 14/10/05 at 09:09 AM |
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The instructions say get it from the rev counter which i won't have. Will the pulse from the alternator be the same sort of pulse?
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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mark chandler
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| posted on 14/10/05 at 10:21 AM |
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You should be able to get something, if you ran from the back of a coil you get 12v on off.
if your alernator does not have a rev counter facility then you will need to unearth the diode pack and poke around with a mulitimeter until you get
a speed related pulse. The diodes form a bridge rectifier, so two pairs effectively, one for the -ve wave, other for the +ve. When you take your tap
its got be between them so you get +ve, nothing +ve.
The pulse will be similar so you will just need to calibrate.
Regards Mark
If you engine runs EFI you will already have a rev counter output, look up the wiring diags and tap this wire.
Regards Mark
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donut
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| posted on 14/10/05 at 10:47 AM |
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Thanks mate. looks like a project for me over the winter
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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tks
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| posted on 14/10/05 at 07:26 PM |
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??
Wy not make an Coil cleaner?
Needings (my opinion)
- 2 diodes in series
- 1 transistor (NPN)
- 1 10Kohms resistor
connect the tacho wire to ground with the 10K
connect the Emitter to the tacho wire, connect the base with the diodes to the coil connect the collector to 12volts..
And you should be done!
the diodes will put down the volts and will break when the voltage is getting down...
also they will assure you now voltage is going in reverse... the transistor generates the most nicely possible pulse!
If needed add an 10k res between base and coil...
Tks
The switch on/off voltage will be 3x 0,6volts. (2 diodes + 1 transistor)
The above comments are always meant to be from the above persons perspective.
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CairB
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| posted on 17/10/05 at 12:02 PM |
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Andy,
Megasquirt supports shift lights and could be used for fuel or spark or both, even on a pinto
I've a 'Cycloperseye' (Big Red LED) driven by Megasquirt in the middle of the dash which works well.
Cheers,
Colin
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tks
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| posted on 17/10/05 at 12:29 PM |
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yeah...
but that amount of voltage..how does it trafel?
i gues it travels through the spark plug..
will it work or not the cleaner?
TKs
The above comments are always meant to be from the above persons perspective.
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Bob C
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| posted on 17/10/05 at 09:01 PM |
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The high V is there all right but it's a transient that doesn't last long (actually a damped oscillation at ~10kHz) and can be removed by
clipping (zener) or filtering a "sniffed off" signal.
On my electronic dash I used a simple 2 pole filter, 2 Rs & 2 Cs and that makes a very clean 3.3V logic signal, plus there's enough series R
to protect the sensetive parts.
EMS or ECU don't use the filter system because they need the timing of the leading edge of the waveform. So these things tend to have more
complex circuits that are more likey to not work in all cases. For a tacho(or shift light) the filter is pretty much idiot proof.
If each pole of the filter has a time constant about 500us, that will work fine - even for motorbike engines!
Bob
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donut
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| posted on 17/10/05 at 09:26 PM |
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Wooooosh...
All gone way over my head!
Andy
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car.
http://www.flickr.com/photos/andywest1/
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Hellfire
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| posted on 17/10/05 at 09:39 PM |
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that will work fine - even for motorbike engines!
I must be a bit cleverer than you Donut. Cos I understand some of it, even though I don't actually know what it is, that will work
fine.................................. I know its summat to do with electrickery as well. I think...............
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Hellfire
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| posted on 17/10/05 at 09:45 PM |
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Colin, do you have any more details or links to the Cyclopseye shift light?
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CairB
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| posted on 17/10/05 at 09:53 PM |
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Hellfire,
'Cycloperseye' - Sorry - Nothing more exciting than a 10mm LED from Maplins driven from an output on the Megasquirt.
Works well tho'
Cheers,
Colin
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