Christmas DIY project for children 3/3: Empire State Blinking Led

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Blinky Buildings v1

Blinky Buildings is a simple kit to teach people how to make derivatives of open source hardware. You are welcome to create a derivative of this kit as long as it abides by the open source hardware definition.

This kit blinks 20 LEDs from an ATtiny85. The code was written in Arduino and uses a technique called Charlieplexing to drive multiple LEDs using just 5 pins of the ATtiny.

This kit assumes you know how to solder. If not, there are plenty of online tutorials on how to solder. The kit is fairly quick to put together, roughly 10 minutes, and the chip has been programmed for you!

Materials and tools:

Here are the parts you’ll need to get stared:

20 LEDs (with a max current of 20mA)

5 Resistors (for 3.2v forward voltage LEDs, I used 680 Ohm resistors)

1 ATtiny85

1 battery holder

1 3v battery

1 switch

Here are the tools you’ll need to get stared:

Soldering Iron

Solder

Wire Clippers

More info here!

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