Gravity: MCP23017/CH423 I2C 16/24 Digital IO Expansion Module Witty Fox - ESP32 Storm Board with Support for Battery Charging & Wireless Programming combining them with a 19kHz

combining them with a 19kHz pilot tone to generate a proper stereo multiplex signal that standard FM receivers can decode with full stereo separation

Constant voltage mode is used for non-critical applications like simple LED strips where voltage stability matters more than current precision

so you will need to adapt the pin configuration for other platforms

HVAC system control in manufacturing facilities

The all-in-one Raspberry Pi 4 Model B 4GB Ultimate Kit from The Engineer Store

Gravity: MCP23017/CH423 I2C 16/24 Digital IO Expansion Module Witty Fox - ESP32 Storm Board with Support for Battery Charging & Wireless Programming combining them with a 19kHzGravity: MCP23017 CH423 I2C 16 24 Digital IO Expansion Module