gpio Tag

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LED driving, I2C chains, pull-up and -down resistors

27 Jun 2021

builds: Lander Module
tags: gpio i2c

I’ve been getting up to speed on LED driving and button/switch driving, so that I can prototype a Raspberry Pi with code that reads a switch, and turns on and off an LED. A couple of thoughts here: The RPi 0W has 26 available GPIO pins. This feels like a lot, but if I pair one or two LEDs with each toggle switch, I’ll run out quickly. Next I found this AW9523 breakout, which controls 16 I/O over I2C.Read More...