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Budget-friendly 16-channel GPIO expander. MCP23017, I²C, chainable to 128 GPIOs, fits $2 PCB deal.
ino - 724.00 bytes - 09/06/2026 at 15:28
ino - 412.00 bytes - 09/06/2026 at 15:28
Standard Tesselated Geometry - 204.48 kB - 09/06/2026 at 15:28
DIY GUY Chris