Are you familiar with shift registers, like the 74HC595? This chip is often used with Arduinos to increase the number of GPIOs that can be controlled. It is an 8 bit shift register that can be Daisy chained to provide as many outputs as you need. Thus, you can control 100+ outputs with 4-5 pins.

 

The circuit is showing only 2 led box individually controlled but my project have 200+ i/o with 5 arduino mega and around 200leds to power. So using less pin is important.

I'm controlling 64 LEDs in a 4x4x4 cube arrangement with 7 I/O's on a Raspberry Pi Zero W. I could have used fewer I/O's, but my design was a compromise between circuit and coding complexity.

When I get around to an 8x8x8 cube, I can stay with 7 I/O's and add more hardware. Or use 4 more I/O's to keep the hardware simple.

 

Are you familiar with shift registers, like the 74HC595? This chip is often used with Arduinos to increase the number of GPIOs that can be controlled. It is an 8 bit shift register that can be Daisy chained to provide as many outputs as you need. Thus, you can control 100+ outputs with 4-5 pins.

Or 200+ relays with 4 pins...