PLS HLP : TLC5940 - Y R all LEDs lit at same time

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i'm attempting test out new tlc5940 got.  i hooked described in "basicuse" sketch, supposed "knight rider" type effect.  

the problem: leds lit pulling around 20ma across them piece (with 2k ohms resistance between tlc5940 pin 20 , ground).  there no "knight rider" effect, or variation @ all.  

- i've double-checked connections (not that means anything)
- nano's surface mounted led (which mirrors pin 13's output) flashing faintly , fast.
- i've attached 6 leds @ moment (see picture below) fear of having 16 lit leds frying -- connected pins 9 - 14 on tlc5940.  
- changing value in tlc.set(channel, 4095) nothing... nothing seem editing code changes -- same outcome; leds lit.

also, i've read people should sending +3.3v arduino tlc5940 (instead of +5v)... how go doing nano?!?!?

i've got doing totally stupid... know  it!  any, , suggestion/recommendations appreciated.  i'll post pic in next post.

thanks , help!

here's pic of current setup... 6 leds hooked outs 9 - 14 on tlc5940.  and off right since usb cable unplugged @ moment... again!



Arduino Forum > Forum 2005-2010 (read only) > Software > Interfacing > PLS HLP : TLC5940 - Y R all LEDs lit at same time


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