Hi there,
I am working on a 8*8*8 RGB led cube. I took reference to;
http://www.hownottoengineer.com/projects/rgb-led-cube.html by nick.
I have build up my cube, led driver board using STP16 Led sink driver and controller, chipKIT UNO. However, I face a problem. After i connect all the wires and run the animation using chipkit, the led cube start to flicker and the leds cant light up brightly, and there isnt any animation at all.
However, when i connect only a layer to my driver board, i am able to see that layer bright up with good animation. Same result for all 8 layers. Can anyone tell me y?
I have check throught my circuit (build by nick). i don't find any thing wrong. I am using common anode led so i used PNP transistors. 1.5k ohm for pull up resistor, 100 ohm connect to PNP base, 1k ohmn connect to IC and 0.1uF capacitor to IC.
I am using Bit Angle Modulation written on software base instead of PWM.
The files are grab from http://www.hownottoengineer.com/down.html (this guy is great btw)
I suspect my transistor cant support the circuit (sound impossible)
Can anyone help me in this? thanks!!
View attachment RGB LED CUBE.pdf
View attachment PNP transistor.pdf
View attachment STP16.pdf
I am working on a 8*8*8 RGB led cube. I took reference to;
http://www.hownottoengineer.com/projects/rgb-led-cube.html by nick.
I have build up my cube, led driver board using STP16 Led sink driver and controller, chipKIT UNO. However, I face a problem. After i connect all the wires and run the animation using chipkit, the led cube start to flicker and the leds cant light up brightly, and there isnt any animation at all.
However, when i connect only a layer to my driver board, i am able to see that layer bright up with good animation. Same result for all 8 layers. Can anyone tell me y?
I have check throught my circuit (build by nick). i don't find any thing wrong. I am using common anode led so i used PNP transistors. 1.5k ohm for pull up resistor, 100 ohm connect to PNP base, 1k ohmn connect to IC and 0.1uF capacitor to IC.
I am using Bit Angle Modulation written on software base instead of PWM.
The files are grab from http://www.hownottoengineer.com/down.html (this guy is great btw)
I suspect my transistor cant support the circuit (sound impossible)
Can anyone help me in this? thanks!!
View attachment RGB LED CUBE.pdf
View attachment PNP transistor.pdf
View attachment STP16.pdf