Hello!
This is my cube led rgb 4x4x4 with picaxe 28x2.
It is made of 64 rgb leds (common cathode), that are driven by a cascade of six 74hc595n shift registers (2 for red, 2 for green, 2 for blue).
On each plane can be adjusted the luminous intensity by changing the pwm signal via command pwmout.
An "aux board", switches on and off each plane in a rapid sequence, so, in small fraction of time, only one plane of leds is switched on.
Therefore the entire cube has an ampere consuption equal to a single plane switched on instead of all 64 leds on (more or less).
This board has a 555 timer to generate the colck and a cd4017be as a sequencer.
Each output of the cd4017be ( 4 outputs) is combinated with the pwm signal ( 4 pwm from picaxe 28x2) through an AND gate 74hc08b1,
and then the 4 outputs "mixed" go on the 4 npn transistors that control the switching on and off of the planes, respectively.
Please, forgive the mistakes of English in what I wrote (surely there are ...)
Further information are available on my new site:
-website http://www.robotelettronica.altervista.org/
-website cube led rgb page: http://www.robotelettronica.altervista.org/projects/cuboled_rgb.html
-viedo youtube: https://www.youtube.com/watch?v=FJem2p6_duk&feature=c4-overview&playnext=1&list=TL1Hp9v8BUQT8
This is my cube led rgb 4x4x4 with picaxe 28x2.
It is made of 64 rgb leds (common cathode), that are driven by a cascade of six 74hc595n shift registers (2 for red, 2 for green, 2 for blue).
On each plane can be adjusted the luminous intensity by changing the pwm signal via command pwmout.
An "aux board", switches on and off each plane in a rapid sequence, so, in small fraction of time, only one plane of leds is switched on.
Therefore the entire cube has an ampere consuption equal to a single plane switched on instead of all 64 leds on (more or less).
This board has a 555 timer to generate the colck and a cd4017be as a sequencer.
Each output of the cd4017be ( 4 outputs) is combinated with the pwm signal ( 4 pwm from picaxe 28x2) through an AND gate 74hc08b1,
and then the 4 outputs "mixed" go on the 4 npn transistors that control the switching on and off of the planes, respectively.
Please, forgive the mistakes of English in what I wrote (surely there are ...)
Further information are available on my new site:
-website http://www.robotelettronica.altervista.org/
-website cube led rgb page: http://www.robotelettronica.altervista.org/projects/cuboled_rgb.html
-viedo youtube: https://www.youtube.com/watch?v=FJem2p6_duk&feature=c4-overview&playnext=1&list=TL1Hp9v8BUQT8