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Topic: A bit help on LED cube (Read 56 times) previous topic - next topic

yash02

I am builing a 8x8x8 LED cube using my arduino mega 3560.
I am using 9x 74HC595 shift register to drive the LEDs.
the cube is haing commone cathode(in layers) and anodes in columns.
I want to ask that which transistor or MOSFET do i use to drive the layers.I have already seen instructables and other forums regarding this but I cannot get correct answer to my question.Also I will prefer to use T0-220 or TO-92 package not SMDs.Also i need a bit explanation on using them.I have already seen IRF9540 but i feel really using it I cannot have that much current.the require curret for each layer would be 64*20mA(for max brightness of LED)=1.280A




THANKS, Yash



Sorry if i have posted this on wrong place you can move it to anothor place also i will not feel bad. :)

GoForSmoke

You can't drive more than 1 8x8 at a time with 9 8-bit shift registers so I am guessing that the 9th register is for which layer.

Connect a common power line (and ground) to each shift register that drives leds and you won't need FETs or BJTs but you will need a resistor per led.

One member here, an electronics engineer who goes by CrossRoads has a 9x9x9 led cube project and I think at least pictures including the complete wiring. You might send him a PM or just do a search.
Nick Gammon on multitasking Arduinos:
1) http://gammon.com.au/blink
2) http://gammon.com.au/serial
3) http://gammon.com.au/interrupts

yash02

The 9 shift register is to switch between layers. The layers are connected to shift register through transistor and the details of transistor I want ro get.

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