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fischertechnik I2C port expander
by juh
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Changelog:
2019-03-27: Added files for etching the PCB in extended gerber, PDF, and SVG file formats in archive PCB.zip (cf. last two images)
This easy to build PCB with printed enclosure provides an additional 8 digital inputs (or 25mA outputs) and 8 outputs with 500mA each, controlled by I2C. It is based on the [MCP23017](https://www.microchip.com/wwwproducts/en/MCP23017) 16-Bit I2C I/O Expander, the outputs are driven by a ULN2803.
The enclosure has connectors for the [fischertechnik c
2019-03-27: Added files for etching the PCB in extended gerber, PDF, and SVG file formats in archive PCB.zip (cf. last two images)
This easy to build PCB with printed enclosure provides an additional 8 digital inputs (or 25mA outputs) and 8 outputs with 500mA each, controlled by I2C. It is based on the [MCP23017](https://www.microchip.com/wwwproducts/en/MCP23017) 16-Bit I2C I/O Expander, the outputs are driven by a ULN2803.
The enclosure has connectors for the [fischertechnik c
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