Hi all,
I got this project that uses the Arduino Diecimila to random fade in/out of 32 LEDs powered by 2 TLC5940. I did my connection based on this link.
http://tlc5940arduino.googlecode.com/svn/wiki/images/breadboard-arduino-tlc5940.pngI powered my 32 LEDs on a standalone 4 AA batteries and it worked a lot of times without fail.
However, this afternoon, i tested the TLC5940 library examples again and all the LEDs suddenly just doesn't light out (sometimes, it flickers but 5% of the time). I uploaded many times to arduino but to no avail. I checked the connection diagram, hoping I didn't screw up. But the connections were correct.
Still, I realized only when I press my finger around pin 19-21 of the first TLC5940, the 32 LEDs suddenly light up, just the way it should be.
Could anyone help me on this one? I've seen some posts on the TLC 5940 problem on putting ceramic capacitors but I doubt since it worked before.
I'm not sure if there's possibilty i burned the TLC chips D: