Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Laser Pointer Store

one driver, multiple lights.....what mA?

Mohrenberg

New member
Joined
Aug 30, 2008
Messages
6,927
Likes
412
Points
0
i'm wanting to make a DIY flashlight with cree LED lights, with 4 LED's and one driver, so if i wanted each LED to be somewhere around 800 mA, what would i set the driver at? also would i put the LED's together in series or parallel?
 

Hemlock_Mike

Well-known member
Joined
Jan 7, 2007
Messages
6,275
Likes
313
Points
83
Well -- 4 Cree emitters x 800 mA = 3.2 Amps. If you attempt to run in parallel, you may need balancing resistors or the lowest volt devices will try to take it all. Series and you will need about 12 or more volts with a current regulator.

Mike
 

Mohrenberg

New member
Joined
Aug 30, 2008
Messages
6,927
Likes
412
Points
0
well i am building it from buying the mag lite LED upgrade, which has a driver built in that runs around 850 mA and is made for 3 cell C or D batteries,

so what if i wried them all in for each LED light, how would i hook them up to the power source?
would i put them in series?
 
Joined
Oct 24, 2008
Messages
1,060
Likes
52
Points
0
Mohrenberg said:
well i am building it from buying the mag lite LED upgrade, which has a driver built in that runs around 850 mA and is made for 3 cell C or D batteries,

so what if i wried them all in for each LED light, how would i hook them up to the power source?
would i put them in series?
No parrallel.

In a parrallel configuration full voltage is applied to all loads but current is divided between them.
In a series configuration current is constant through all loads but voltage is divided between them.

The driver needs 4.5v to operate. Connecting them in series will inhibit the voltage they receive. 3 drivers in parrallel will draw 3 times as much current from the batteries. I would recommend you find a driver that can supply 2.25A and connect 3 emitters in parrallel. But that is some driver!
 




Top