9 replies to this topic

[SourceLeisure]

Sure Your Seen The 12v 10&5MM LED's (Wedge Style)

Normally Found In Car Dashboards & Also In Various Colour's

Im Thinking
They Are Less Prone To Blow -Think There 90,000 + Hrs Use
Lower Wattage - Less Strain On The Psu
Various Colours & Cheap For Bulk Buy
Less Heat - Wont Damage The Prints On Reels & Glass Ect


But Will It Work ??

Ie Is The Resistance On Led's Are That Low The Machine Will Think The ((Bulbs)) Fitted Are Blown

I Know Its Hassle Of Finding Out Also The Terminal Current The Correct Way Around


Just Quick Idear .... Just Wondering If Anyone Has Tryed This ??

[SourceLeisure]

Link For Idear I Had To Replace them with
http://www.ebay.co.u...=item3369d1355c

[cardie]

Pretty sure you will need a transformer of some sorts, LEDs take a much lower current that standard bulbs. In a bulb an element has to be heated white hot, were as an LED needs a tiny current to cause a reaction. They will just burnout instantly probably,

[Guitar]

Well the bulbs run at 12v rms, so you could use 12v LED's (internal resistor) or lower voltage LED's with an external resistor. They might flicker a bit as the bulbs are driven by an AC multiplexed 63v (i think) supply, so as LED's will only work in one polarity, anytime the AC is in the negative phase the LED won't light. But LED's have a much shorter "light up" time so they effectively smooth the lamp fade at the same time.

MPU4 drives 7 Seg LED's and Lamps from the same multiplexer (but with a 5 or 12v DC supply) so as long as they AC doesn't make it annoying flickery it should be possible (and quite easy).

I believe however that some older systems use a diode driven matrix for the lamps in which case LED's could cock up the matrix operation. I haven't got my thinking hat on atm as its late, but ask someone with a decent electronics knowledge and they should be able to answer that one.

[SourceLeisure]

Im Going To Give It Ago & See What Happens & Post After all It Wont Damage The Machine

Will Post A Vid Of Before & After Effects - Give Me A Month Though - Leds Are From Hong Kong

[jim2311]

I'm sure with the correct electronic modifications it should be possible to replace bulbs with LEDs. If the bulbs use AC then using a drop down resistor(if necessary), a rectifier and an elecrtolytic smoothing capacitor would give a constant DC.

However, I'm wondering if the LEDs you're proposing give out much light. Ok they look bright enough in a car dashboard, but that is usually observed in the dark through a thin mask. just a thought.

[stanmarsh14]

In short, yes your idea will work, but for reasons of economics (As you will see with household LED Bulbs costing £12+ a time right now) + modifications required to work, currently don't make it a viable choice for wedge lamp replacement.

[Guitar]

What I have discovered is that you can buy AC LED's which is 2 LED's in one each one wired opposite polarity but because they are within the same diffuser package they shouldn't flicker too much from the ac input voltage.

[SourceLeisure]

Brill any link regarding ?

[SourceLeisure]

Simple .. But Just Came To Me .. The Bulb Fittings Have A Diode In Them Alowing Them To Only Allow Electric to pass through one way ,,, Surely It Would Kinda Act Like A DC Circuit

12v Ac +=----( I )--- Diode ---Resister -LED ----- (-)

As Ac (Alternating Current) Flows Both Ways Surely The Diode Would Kinda Make A Small DC Circuit... Am Still Awaiting The Leds To Test