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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. Cat No SC5228. Price: Free Files: Three I-O Expander Modules Software V2.zip (ZIP contains .ino and .bas files; 11.0KB) Related to: Feature: Three I-O Expanders to give you more control! (November 2019 [print issue] [online issue]) Other items relevant to this project: PCA9685 16-channel 12-bit PWM module ($6.00) Add to trolley MCP23017 16-channel I/O expander module ($3.00) Add to trolley PCF8574 8-channel I/O expander module ($3.00) Add to trolley