Control LEDs with the Explorer HAT and an 8-bit shift register on the Raspberry Pi

Sandy Macdonald has written an excellent explanation and tutorial for using a shift register with the Pimoroni Explorer HAT on top of the Raspberry Pi. It allows you to control 8 LEDs using just 3 output pins on the HAT, which sounds impossible, but is in fact entirely possible thanks to the way a shift register works! Read his tutorial here.

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