Led battery question

[bumblejacket]

For evil purposes I need to power 25 leds from a battery, and each one takes 1.9 volts 10ma. So, if i have calculated correctly, that needs a 50 volt battery??? I am fairly good with electronics, but I'm not very good with batteries and I'm not sure where to magically get 50 volts. Also, should they be in series or in parallel? Do I need resistors? I would love to get these questions answered, so please help answer them.

[Gordon1]

Parallel. as for the resistors, use this http://ledcalculator.net/

for v use 9
for voltage drop use 1.9
for current use 10ma
and for number use 50

then it will spit out a diagram.

[timmeh87]

Just put them in parallel and use a 1.9v battery or something. Or perhaps a 'hybrid' combo, something like 4 in series x 12 in parallel.

Also, you arent making one of those things that changes traffic lights are you?

[zzattack]

Just put them in parallel and use a 1.9v battery or
Also, you arent making one of those things that changes traffic lights are you?

link??

[Mario]

Just put them in parallel and use a 1.9v battery or
Also, you arent making one of those things that changes traffic lights are you?

link??

Here. But PLEASE know that this is ILLEGAL, and you can face 90 days in prison and a $5,000 fine just for owning one.

edit by mod: NO. -bic

[bumblejacket]

Damn I Didn't know everyone here was psychic! Thats exactly what I'm building! but in reverse. I need a control thing for an ir thing im building, and overkill is good, so 50 leds it is!

[timmeh87]

the 1.9v gave it away

[kasar]

mmm, very interesting
it also seems pretty easy to make