LED driver

Electronics4you

Member

• Aug 11, 2010

• #1

Hi there,

Does anyone know a good LED driver (constant current source), that doesn't have a serial interface. I just need to light up ~100 LEDs at a constant current, and not contol each individual one.

Thanks

 

Sceadwian

Banned

• Aug 11, 2010

• #2

100 LEDs in series? Parallel? A mixture of both? What you're asking for isn't so much a driver as it is a power supply, no single chip is going to manage it.

 

R

Raul

New Member

• Aug 12, 2010

• #3

www . mastechpowersupply . com They are pretty cheap
I have not used them though

 

Last edited: Aug 12, 2010

Electronics4you

Member

• Aug 13, 2010

• #4

I was going to use a couple of drivers to feed the 100 LEDs, and the drivers was simply used to keep a constant current

 

P

peufeu

New Member

• Aug 14, 2010

• #5

What's the power supply voltage ? mains ? battery ? LED current and voltage ?

 

Electronics4you

Member

• Aug 17, 2010

• #6

The power supply is 12V transformer and enough amps to drive all the LEDs at 3.6 V and 30 mA

 

C

cobra1

New Member

• Aug 17, 2010

• #7

put them in parallel in strings of 3, this will connect 99 leds, 3.6v @ 20ma, will give a total draw of 680ma

each series will need a 100ohm resistor.

all this can then be fed from one single 12v, 1Amp source

 

Electronics4you

Member

• Aug 21, 2010

• #8

I thought that might be the solution, but was expecting a more elegant solution with less power waste
But thanks anyway