Memory: 1.8 k memory (about 6 k after bootloader) Power: Power via USB or external source or 716 V to 5 V (automatic selection) Compatibility: IDE 1.0 + OSX Interfaces: I2C and SPI (via USI) Key benefits Clear memory specification for small embedded tasks, with expanded capacity after bootloader. Flexible power options enable USBpowered use or external supply with automatic source selection. Ready for development with IDE 1.0 and macOS (OSX, compatibility clarified). I2C and SPI support through USI, enabling common peripheral connections with minimal wiring. What this product enables Quick prototyping of I2C and SPI peripherals using a compact microcontroller platform. Development and testing in a macOS environment with IDE 1.0 compatibility. Safe, flexible power management for bench testing, portable setups, or lab work. Use scenarios Prototyping an I2C sensor interface: connect a temperature or pressure sensor via I2C and program using IDE 1.0 on OSX. Developing a SPI peripheral: interface with a SPI flash memory or display through the USIbased SPI channel. Educational lab project: students learn microcontroller programming and peripheral communication (I2C/SPI) while using USB or external power and the IDE 1.0 environment on OSX.