more 53 pin digital

Using Arduino Project Guidance
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hello ,

i need to make 100 leds control from my pc ?

i need to make smart home , the arduino mega 53 pin digital i need more that

thanks
kind regards

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Use 74HC595 shift registers to extend the number of output pins. You only need three pins to drive all of them and each will give you 8 outputs so 13 will give you 104 pins. You can get one on a breakout board for $2.95: SparkFun Shift Register Breakout - 74HC595 - BOB-10680 - SparkFun Electronics

If you need to control the brightness of each LED you can use the TLC5940 LED driver (http://www.ti.com/lit/ds/symlink/tlc5940.pdf) Each will give you 16 outputs so you only need 7 of them. They cost 12.95 on a breakout board: SparkFun LED Driver Breakout - TLC5940 (16 Channel) - BOB-10616 - SparkFun Electronics

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hi
i have 74hc595 can you see simple how to control , because i need to control led on 74hc595

exp : if i need to turn on 1 pin or 3 ..

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This shows how to wire two 74HC595 shift registers together and use them to control 16 LEDs:

You only have to add more shift registers.

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You can also look into MAX7219, each one can control 64 LEDs.
I have this little breakout board that will let you up each LED separately and place them where you want.
The MAX7219 is like 8 shift registers in package.
http://www.crossroadsfencing.com/BobuinoRev17/
Here's a clip of 8 LEDs blinking on & off
http://www.crossroadsfencing.com/BobuinoRev17/MAX7219demo_movie.AVI

925×692 112 KB

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The boards are designed to be connected in strings, so 2 boards can do 128 LEDs.

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