Pages: [1]   Go Down
Author Topic: Hooking up TLC5940 to 12V  (Read 440 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 2
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi everyone!

Yes, another thread about the TLC5940 smiley-razz
I've read numerous threads on several forums about the TLC5940, daisy chaining, power dissipation, and I'm slowly learning the inner workings of this awesome little chip smiley

My setup: My idea is to learn the TLC5940 using parts I've got lying around. I'm attempting to drive a 12 V RGB LED strip cut up to 16 short parts with an Arduino UNO. 16 RGB channels means 3 TLC5940s which I will daisy chain. The load won't be very high, since the strip is cut up, at max 15 mA per output pin on the TLC5940s.

My question: Of all the threads and guides I've read, few of them use anything other than the same 5 V for the LEDs and the TLC5940. See the attached image. Is this the correct way to hook up the LEDs to a 12 V rail?

Note that I have hidden the daisy chain wires for better visibility.

EDIT: It just hit me that the image is a bit misleading. There is no single LED on the outputs, but instead the short LED strips, with mounted resistors.


* TLC5940 small.png (426.83 KB, 1000x1006 - viewed 26 times.)
« Last Edit: November 17, 2012, 05:57:32 am by alleus » Logged

Manchester (England England)
Offline Offline
Brattain Member
*****
Karma: 514
Posts: 31543
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
. Is this the correct way to hook up the LEDs to a 12 V rail?
Looks like it. The +12 is connected to the anodes of the LEDs and the -ve from the 12V is connected to the arduino ground.
The TLC5940 chip can stand about 16V so the 12V is fine.
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 2
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Looks like it. The +12 is connected to the anodes of the LEDs and the -ve from the 12V is connected to the arduino ground.
The TLC5940 chip can stand about 16V so the 12V is fine.
Thanks Mike smiley I'll try it out, just have to get hold of a few resistors and I can hook it all up smiley-wink
Logged

Pages: [1]   Go Up
Jump to: