The ATTINYSHIELD1 from Arrow Development Tools is a prototyping and development platform for the Atmel AVR ATtiny microcontroller. The board includes a pre-programmed microcontroller with all the necessary I/O pins in an Arduino-compatible shield form factor, allowing for quick, efficient prototyping and development of projects using the ATtiny. It also includes an onboard reset switch, a 3.3V regulator and level shifting to ensure compatibility with different networks as well as an ISP connector for programming and power. The board also provides access to both digital and analog I/O pins, allowing developers to quickly develop projects involving both digital and analog signals. Using a standard, Arduino-compatible development environment, engineers can create projects in a fraction of the time it would take to develop them from scratch, making it an invaluable tool for rapid prototyping.