As per the Subject matter, what power is needed to power this arrangement and what does the "board" do? I have 2 of these.
Thank You for the assistance.
Dave
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What I see is a a diode, a resistor, another diode and a capacitor. I am not an electrical engineer, but my thought is that your circuit is an AC LED driver.
Many of the electrical / electronic wizards lurk on the Electrical Forum, so you will likely get a quicker and more accurate answers there.
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It looks like Kader numbers on the boards. I can't judge the size of the board, but from the looks of it I would guess cab light board from a G scale USA GP or SD diesel. Is that the original light board with it? I also see only one LED output is used. If it is smaller, possibly a Kline number board light?
Thanks Bob and Chuck.
The items are train related.....came out of a stripped engine....I believe to be Atlas.
The larger board is about the size of a quarter and the tiny board has 2 led lights on it.
I'd like to re-use them....I just don't know how much voltage to apply.....AC or DC ?
Dave
As is, it looks like dc; because things are in series I think.( the backlight was great for seeing MOST traces) (start at 3v then increase...but)..so most likely it adds like this ...{ 1.5v diode +whatever voltage R1 eats + 1.5v led + 1.5v diode= over 4v, I'd bet 5v, but can it handle 6? 9? 12v?} It could be coverted (maybe repaired?) to take ac
So 5v+ but it's hard to say for sure because the resistor color bands aren't clear at all, can you list them?. And the traces to the second led spots can't be seen. I didn't think to look, but if led#2 was ever used, and it faced opposite #1, it WAS ac.(but not without it, & not if they face the same direction)
Can you see part or all of the numbers on the black diodes too?) Does the tiny led board say anything at all?
Can you tell if those tiny leds face/connect opposite or face/connect the same direction?
Your looking for the turn on voltage. Depending on the results, guessing how much more voltage it can handle, increasing just a volt or two at a time and gauging results. At the point of apparent peak brightness, any more power at all is pushing your luck at this point, so go slow. Then again, if you do cook them, new leds are very cheap and that board would still be handy for a few configurations. Knowing the led values is half the battle, and that's an unknown, you HAVE to guess. The restor and capacitor disk's voltage would be good clues. (for longer lasting lights after removal of power, swap in a "can" cap of same voltage and larger uf.)
