Can you control 20 leds with only 5 I/O lines? Charlieplexing is cute. We made it clean and easy to play withDesigned by jdn, Ships from Switzerland
What is it? The Charlie kit is a 30 by 33 mm white PCB with 10 bicolor leds, 5 resistors and 5 pins ready to be inserted on an Arduino port. No power supply. Pins must deliver 25 mA. If you want t...Read More…
The Charlie kit is a 30 by 33 mm white PCB with 10 bicolor leds, 5 resistors and 5 pins ready to be inserted on an Arduino port. No power supply. Pins must deliver 25 mA. If you want to play with the Raspberry Pi, see the Charlie-Raspi with its tricky amplifier. The kit is easy to solder, 10 leds, 5 resistors, one connector (one straight and one bended in the kit). Delivered in an envelope, minimum cost, no custom.
10 bicolor leds mean 20 leds to control. It starts to be interesting mixing the red and green with adequate timing. See the video.
The leds are arranged in a triangle. Bottom only led is simple to control - 0 1 or 1 0
Add the second row with 2 leds. You have now to understand the chalieplexing trick, using the pinMode and digitalWrite. Learn to be more efficient writing real C and controlling the PORT and DDR registers.
So on, you will end up enjoying to control all the leds.
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Swiss Post: Standard Ground Rate (No Tracking Code)
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