[Healeys] ignition warning light

[Roger Grace]

Just found this in my drafts that I had neglected to send.
The warning light intensity is roughly proportional to the difference to
gen/alt voltage compared to batt volts.
Hence bright when engine off; and glow when gen is struggling at low RPM,
and goes bright when zero volts with a gen fault.
To use a led, the trick is to install a shunt resistor in place of the
incandescent warning light.Typically about 68 ohms or so. Watch the watt
rating it needs to be continuously rated - not less than 3 W Also led
polarity.
I have had one fitted to my BJ8 tacho and works with both gen or alt.
Speedy Cables did this for me when I upgraded to stepper movement and -ve
ground.
See pix and the polarity text change they did.
rg




On Fri, Sep 30, 2022 at 4:20 AM Mark Donaldson <ardmorebusiness at xtra.co.nz>
wrote:

> Simon,
>
> I don’t believe whether a charging system is generator or alternator makes
> any difference.
>
> The light is there only as a ‘tell tale’.   It doesn’t need to offer a
> resistance, and the current drain of that little LED is tiny.
>
> My suggestion is – try it and see.
>
>
>
> Cheers
>
> Mark
>
>
>
> *From:* simon.lachlan at alexarevel.plus.com <
> simon.lachlan at alexarevel.plus.com>
> *Sent:* Friday, 30 September 2022 11:18 PM
> *To:* 'Mark Donaldson' <ardmorebusiness at xtra.co.nz>; warthodson at aol.com
> *Cc:* 'Healeys' <healeys at autox.team.net>
> *Subject:* RE: [Healeys] ignition warning light
>
>
>
> Sounds like a plan to me. Still – to revert to the original question – not
> sure about using an LED in the ignition warning light. Maybe with a
> generator, but not with an alternator. Can’t remember!
>
> Simon
>
>
>
> *From:* Mark Donaldson <ardmorebusiness at xtra.co.nz>
> *Sent:* 30 September 2022 10:37
> *To:* simon.lachlan at alexarevel.plus.com; warthodson at aol.com
> *Cc:* 'Healeys' <healeys at autox.team.net>
> *Subject:* RE: [Healeys] ignition warning light
>
>
>
> Gary, and Simon,
>
> I bought some last year for my BN2 and tri-carb.  They are 12v LEDs in
> GREEN.  I can now easily see the direction indicator light in daylight.
>
> Make sure your LED is green, and not white, as the light intensity tends
> to bleach out the green of the plastic case.
>
> Cost me NZ $7   That’s ‘peanuts’ in any currency.
>
> My next job is to fit an audible alarm so that I can hear when the
> indicator is on.   Ditto for leaving my lights on.
>
>
>
> Mark
>
> Ardmore, NZ
>
>
>
>
>
> *From:* simon.lachlan at alexarevel.plus.com <
> simon.lachlan at alexarevel.plus.com>
> *Sent:* Friday, 30 September 2022 5:31 AM
> *To:* warthodson at aol.com
> *Cc:* 'Healeys' <healeys at autox.team.net>
> *Subject:* Re: [Healeys] ignition warning light
>
>
>
> Pretty sure that you can’t use LED.
>
> Mine was dim too but I found that to be function of the lens in the dial
> which, in my case, was too thick. Maybe – as I was recently advised here –
> take a sheet of thin acetate and punch the appropriate size hole.
>
> Simon
>
>
>
> *From:* Healeys <healeys-bounces at autox.teamnet
> <healeys-bounces at autox.team.net>> *On Behalf Of *warthodson--- via Healeys
> *Sent:* 29 September 2022 16:32
> *To:* healeys at autox.team.net
> *Subject:* [Healeys] ignition warning light
>
>
>
> Is there a brighter bulb available for the ignition warning lite that will
> fit a stock 100 socket & be relatively easy to see if it is on or off in
> day light? I don't care if the bulb is LED or incandescent.
>
> Gary Hodson
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