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  #21  
Old 22.01.2015, 09:56
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Re: The real scoop on yellow headlights

Could you try smoothing the controller output with a biggish capacitor and a couple of hefty diodes?
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  #22  
Old 22.01.2015, 10:24
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Re: The real scoop on yellow headlights

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Could you try smoothing the controller output with a biggish capacitor and a couple of hefty diodes?
I have a cap that I was going to throw in to smooth the 6V bulb at idle. I'm not sure how it would work with the 12V bulb, but I think I'll try the tint first. That 6V bulb brightness is outstanding other than looking obviously like an LED on an old motorcycle.
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  #23  
Old 22.01.2015, 11:05
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Re: The real scoop on yellow headlights

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Can you show me the bulb you're talking about?

The thing is - no LED is really for either 6V or 12V. The forward voltage of a typical white LED is around 3V.
The internal circuitry reduces the voltage to what is needed.

I'd bet you can use most LED bulbs designed for 12V without any problems.
This all depends on how those 12 or 6 V get reduced to 3 V.
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Old 22.01.2015, 12:13
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Re: The real scoop on yellow headlights

ok, just change the headlight to 12v eg

http://www.ebay.com/itm/Industry-Gra...-/221182096801

simple to install, 12v headlight in all its glory
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  #25  
Old 22.01.2015, 13:42
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Re: The real scoop on yellow headlights

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ok, just change the headlight to 12v eg

http://www.ebay.com/itm/Industry-Gra...-/221182096801

simple to install, 12v headlight in all its glory
I guess if we were to crack that open it'd be a cap and diodes. Maybe I'll pick one up and test it out on a bike I don't care about. Maybe it'd drive the whole lighting system.

Like I said before, the 6V lamp is actually really effective, and it's probably just as blue as any other LED. It just looks weird on an old bike.
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  #26  
Old 22.01.2015, 14:50
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Re: The real scoop on yellow headlights

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I guess if we were to crack that open it'd be a cap and diodes.
You guessed wrong.

Tom
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  #27  
Old 22.01.2015, 14:54
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Re: The real scoop on yellow headlights

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You guessed wrong.

Tom
Um, you have one?
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  #28  
Old 22.01.2015, 15:11
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Re: The real scoop on yellow headlights

No, but you can't make a DC voltage doubler with just caps and diodes.

Tom
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  #29  
Old 22.01.2015, 15:14
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Re: The real scoop on yellow headlights

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No, but you can't make a DC voltage doubler with just caps and diodes.
Ahem...
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Old 22.01.2015, 15:15
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Re: The real scoop on yellow headlights

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That's not a DC voltage doubler, it has AC input, DC output.

Tom
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  #31  
Old 22.01.2015, 15:19
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Re: The real scoop on yellow headlights

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No, but you can't make a DC voltage doubler with just caps and diodes.

Tom
we are not talking about doubling the voltage, we're talking about making 3V out of a 6 or 12 V input.
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  #32  
Old 22.01.2015, 15:21
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Re: The real scoop on yellow headlights

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we are not talking about doubling the voltage, we're talking about making 3V out of a 6 or 12 V input.
Umm, yes we are, refer to post #24.

Tom
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  #33  
Old 22.01.2015, 15:25
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Re: The real scoop on yellow headlights

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That's not a DC voltage doubler, it has AC input, DC output.
Oh yes.
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  #34  
Old 22.01.2015, 15:33
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Re: The real scoop on yellow headlights

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No, but you can't make a DC voltage doubler with just caps and diodes.

Tom
Tom, try not to be so pedantic, please. I was making a "poetic" response to Jern

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Could you try smoothing the controller output with a biggish capacitor and a couple of hefty diodes?
OK? Of course there are other components, but in fact every step-up converter will contain caps and diodes. Chill.
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  #35  
Old 22.01.2015, 16:26
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Re: The real scoop on yellow headlights

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Tom, try not to be so pedantic, please. I was making a "poetic" response to Jern
It's OK. I've been known to indulge in bouts of rampant pedantry myself.
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  #36  
Old 22.01.2015, 17:45
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Re: The real scoop on yellow headlights

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No, but you can't make a DC voltage doubler with just caps and diodes.

Tom

as a minimum I think you might also need some solder and maybe also some cables or a PCB.
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