CD74HC4067 16-channel analog/digital multiplexer/demultiplexer breakout board. It provides a single common I/O that can connect to one of 16 channels (Chan0–Chan15). The device can pass digital and analogue signals within the board’s supply voltage (signals must stay within Vcc). The common pin is tied to your microcontroller or system, and the channel is selected by a 4-bit binary address applied to the S0–S3 select pins. Key benefits - Expands I/O: access 16 devices or sensors using a single line, reducing microcontroller pin requirements. - Flexible signal handling: supports digital and analogue signals without additional wiring. - Simple control: drive S0–S3 with four GPIOs to select any channel from 0000 to 1111. How to use - Connect the common line to your MCU or system, and wire Chan0–Chan15 to the devices or sensors you want to access. - Use four digital pins to drive S0–S3 to select the target channel. - Ensure all signals stay within the board’s supply voltage. Use scenarios - Serial data routing: connect the TX outputs of up to 16 devices to a single RX pin on a microcontroller, then select which device to listen to. - Sensor multiplexing: read 16 analogue sensors with one ADC input by sequentially sampling channels. - I2C/SPI expansion with multiple boards: route common lines to many devices across I2C, SPI, or similar buses using additional boards. Compact breakout board for easy prototyping and integration with standard 0.1 inch headers.