The ATtiny85 is a high-performance, low-power 8-bit microcontroller from Microchip Technology. It is a part of the Atmel AVR microcontroller family and is specifically designed for applications that require a small footprint and low power consumption. The ATtiny85 features 8KB of in-system programmable flash memory, 512B of EEPROM, and 512B of SRAM, making it suitable for a wide range of embedded systems. One of the key features of the ATtiny85 is its 8-pin package, which allows it to be used in space-constrained designs. Despite its small size, the ATtiny85 offers a rich set of peripherals, including analog-to-digital converters, timers, and communication interfaces. This makes it an ideal choice for applications such as sensor nodes, wearable devices, and small consumer electronics. The ATtiny85 is also supported by a comprehensive set of development tools, including a fully-integrated development environment and a wide range of development boards and programmers, making it easy to get started with this versatile microcontroller.