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Sample code for Three I/O Expander Modules
Sample BASIC code and Arduino sketches, as described in the November 2019 article on the three I/O expander modules.
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PCA9685 16-channel 12-bit PWM module
A PCA9685-based PWM I/O expander module, as described in the November 2019 issue. Controlled via I2C.
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MCP23017 16-channel I/O expander module
An MCP23017-based 16-channel I/O expander module, as described in the November 2019 issue. Controlled via I2C. Supplied with separate headers.
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PCF8574 8-channel I/O expander module
A PCF8574-based 8-channel I/O expander module, as described in the November 2019 issue. Controlled via I2C.
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