Re: Hooking up 2 LED's to 25v flasher. What resistor to use on the negative side?

Hi Kirb,

There are no resistors in the head. There's a small pcb and the led's
are in series with each other. Picture this, small pcb with two led's
in series. There is a red/black wire which was connected to a 3v
lithium battery. Also, in line was a small micro switch which when
pushed, would make the eye's light up. I just by passed the switch and
then ran the two wires thru the head box down into the playfield. There
is a flash that I'd like to hook these LED's up to but it's giving off
25vdc. I know about the calculator. However, I can't tell what MA the
Led's in the head are or what voltage they are. I'm gonna guess that
they are 2.0 amp led's and 20MA. @ 25vdc current coming in, it looks
like I'im supposed to use a 1200 ohm 1 watt resistor. Could someone
verify this?
John

.

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