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Old 21-01-2011, 01:49 PM   #1
Spiyda
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Default Custom LED fuel gauge..

In case anyone is interested..

(and this is different to the sender compensator that I'm already testing)

I'm making an LED fuel gauge for Geoff

its a bit different in a couple of ways..

To make it as small as possible, the LEDs will able to be remote from the gubbins. (In Geff's case, the little box with the doings in will stick to the back of his dash... behind the acewell.. and the LEDs probably 5 or 6 inches away, poking through the dash)

It will be possible to wire it up so that it only comes on when a button is pressed.

It will be available in multiples of 4 LEDs.. so for a track car you might only want 4 LEDs.. but for a road car you might want 8 (12 if folks are interested)

It will have its own built in voltage stabiliser, so doesn't need the dash one to be working

It will use existing resistive senders... almost any will work..

It will put less voltage and current through the sender than normal gauges.

finally...

Each LED will be able to be set to come on at its own configurable fuel level..

this means for a road car you can compensate for weird shaped tanks.. so that half the LEDs on means exactly half a tank of fuel etc..

or for a track car, you could set it so that all 4 LEDs are near the bottom of the tank..

Its also possible for one LED to be set to flash when the level gets below a certain level.. (but I haven't ordered any flashing LEDs yet !)

Price is yet to be determined.. (I'll do a time and motion when I build them) but will probably be around ú25 for club members

these don't need testing like the other ones I'm building... so could ship next week.. !


Anyone interested... comment or pm me..

Chris (-=Spiyda=-)
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Old 21-01-2011, 02:00 PM   #2
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sounds cool, i have autometer fuelgage mech gauge,
last time on track i went dry!

Im up for some kind of fuel warning system,
do you supplie leds for beam, flashers, ign to?

keep up the good work!
//marcus
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Old 21-01-2011, 02:15 PM   #3
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Quote:
Originally Posted by Marcus Nordblom View Post
sounds cool, i have autometer fuelgage mech gauge,
last time on track i went dry!

Im up for some kind of fuel warning system,
do you supplie leds for beam, flashers, ign to?

keep up the good work!
//marcus
I can get you anything Marcus... (but the wife is already booked out this weekend )

The problem with LEDs is that they are either too bright or not bright enough... you need a bit of savvy to select the current limiting resistor..

I was thinking that perhaps I could make a little circuit board with adustable resistors so that folks could set each LED brightness exactly how they want.. That could be controlled by a car lights dimmer so that all the LEDs would dim together as well...it would also serve as a little junction box for wiring then in...What do you think ?

I have been thinking about the mounting of the LEDs in the dashes etc.. personally I don't like the LED clips.. they look a bit tacky.. I'll see what I can come up with and I'll put them on the website.. I've got an injection molder for goodness sake.. I should be able to do something !
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Old 21-01-2011, 04:32 PM   #4
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Hi matey - I'm definately interested in this.
Am thinking of removing the gubbins from a 2" Smiths fuel guage and mounting the LED's in that?
What size are the LED's so I can work out how many it would need?

Don't suppose you have a picture showing the brightness relative to the cabin?

Or also interested in the compensator you mentioned in your other post to use the van tank sender with my Honda dash...

Cheers
Carl.

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Old 21-01-2011, 05:08 PM   #5
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Originally Posted by Brumski View Post
Hi matey - I'm definately interested in this.
Am thinking of removing the gubbins from a 2" Smiths fuel guage and mounting the LED's in that?
What size are the LED's so I can work out how many it would need?

Don't suppose you have a picture showing the brightness relative to the cabin?

Or also interested in the compensator you mentioned in your other post to use the van tank sender with my Honda dash...

Cheers
Carl.
Carl,



Currently I'm using 5mm LEDs
If using the thin push on panel bezel, they have to be spaced 10mm apart between centres
and I would say 8 LEDs is plenty for a road car... probably 4 for a race car..

with the lowest being the Red and the rest amber..
(or whatever you want.. I have several colors)

My C1 has the equivalent of 6 (but LCD instead of LED) so I think thats enough..

the mock up I have on the bench is using 3 amber and one red.. the red one is naturally brighter than the amber ones.. and will remain proportionally brighter as the overall unit is dimmed.

the Red one comes on when the fuel gets below a set level
the amber ones come on when the fuel gets above a set level

the actual level being configurable for each LED individually..

The picture does not tell you much, I've taken it on a laptop for comparison with the indicator LEDs.. but I can say that on full brightness, the LED is painful to look at.. These LEDs are the ones I use for the high level brake light, and fender tip lights.. they are pretty much the brightest 5mm LEDs that can be had..

they are much brighter than needed, but they can always be reduced in brightness, much harder to make dim ones brighter !

Chris

ps the picture shows the LEDs totally swamping the camera.. so the colours are false
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Old 21-01-2011, 06:27 PM   #6
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Quote:
I can get you anything Marcus... (but the wife is already booked out this weekend )
Thats a shame, otherwise i could have introduced her for my notorious friend "Big-Swede"


my plan is to use a 5" speedo beezel and replace the cluster with a an acewell speedo, autometer g.tech, lambda gauge and leds for flashers, fuel varning light (1 bright red) etc and instead of the speedo glass use a piece of steel that i could take up holes inů sounds doable??

maybe you could think something out, ledwise?
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Old 21-01-2011, 06:43 PM   #7
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Thats a shame, otherwise i could have introduced her for my notorious friend "Big-Swede"


my plan is to use a 5" speedo beezel and replace the cluster with a an acewell speedo, autometer g.tech, lambda gauge and leds for flashers, fuel varning light (1 bright red) etc and instead of the speedo glass use a piece of steel that i could take up holes inů sounds doable??

maybe you could think something out, ledwise?
Hmnnn. she already met Mr Potato Head !

re the dash... sounds good...

but I would use a nice bit of ally or plastic rather than steel... you don't want it going rusty !

all your normal warning lights can be replaced with LEDs and the brighness can be adjusted with the little box I mentioned below..

and in case you hadn't guessed.. this LED fuel gauge can also be used as a temperature gauge !

if you glue the LEDs into the plate, you won't need to use bezels, then you can fit the LEDs closer together...

given time, I could probably come upo with a fuel/air gauge as well

Chris
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Old 21-01-2011, 07:13 PM   #8
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sounds nice, will use 2 mm alloy instead then

nice to have all the warning lights in one place, oil, water, fuel

have to fab up something so we can see how much space there is etc…

cheers
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Old 22-01-2011, 10:24 AM   #9
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This sounds good!

I'm keen for one of these. Had a nightmare with my fuel level indicator arrangements since the cars been on the road - i 'temporarily' mounted a halfords-style 52mm fuel guage above me rear view mirror (as i didn't want to cut it into my dash) and it's been there for a year now
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Old 22-01-2011, 11:55 AM   #10
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Was playing with ther circuit last night..

I can also do a version with a dual relay,
capable of switching 2 radiator fans on at different temperatures..

so that could either be in an 8 LED temp guage with dual relays.

or..

a dual 4 LED fuel gauge and 4 LED temp guage.. with dual relays !

with of course the original 8 LED fuel gauge

Not sure exactly how many variants to do...
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Old 23-01-2011, 05:38 PM   #11
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Will these work off the standard Mini sender? If I'm interested

Alan...
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Old 23-01-2011, 05:49 PM   #12
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Will these work off the standard Mini sender? If I'm interested

Alan...
They will work off any resistance type sender. !

I'm currently looking at the problems of including anti-slosh on the LED gauge
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Old 27-01-2011, 08:19 PM   #13
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This could be exactly what I'm looking for, my digital dash fuel gauge doesn't want to talk to the Metro sender on the Midas at all.
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Old 27-01-2011, 08:51 PM   #14
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This could be exactly what I'm looking for, my digital dash fuel gauge doesn't want to talk to the Metro sender on the Midas at all.
Well,

I don't have a digital dash to play with, but..

the Acewell sender is supposed to be a 100 Ohm sender...

so in theory the doofery I have will work fine... although I can't say I've tested it on one, but I've tested it on a 100 Ohm pretend sender !

Chris
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Old 27-01-2011, 10:43 PM   #15
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It's the other way around, I have a standard metro sender fitted to a standard Metro tank. The digi dash is a Koso one which is essentially intended for bikes, the gauge on the Koso dash won't play so I'd be happy to switch off the option and fit something like your gauge elsewhere rather than mess around trying to fit a sender that will work with the dash.
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