Word Clock: Switching Lights

Progress is coming slowly on the word clocks. I’ve assembled the LED driver boards. These boards host a series of standard serial-in parallel-out 595 shift registers that pump into ULN2003A NPN darlington transistor arrays. The schematic is pretty straightforward. The arduino tells the shift registers which pins to turn on/off. When a pin goes high…

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Word Clock: Building the Frame

I’ve started building a word clock. For the most part, I’m copying this one, but I’m hoping to include an improvement or two. Since the electronics piece is pretty straightforward, I began by building the frame the lights for each word from bleeding into the next. With the frame fully assembled, it was time to…

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