• ATtiny85-20PU Microcontroller IC, 8-Bit AVR MCU Chip with 8KB Flash 20MHz, High Performance Low Power 8-Pin DIP, Compatible with Arduino IDE DIY Projects

ATtiny85‑20PU – 8‑Bit AVR Microcontroller (8‑Pin DIP)
The ATtiny85‑20PU is a compact, high‑performance 8‑bit AVR MCU that packs 8 KB of flash memory, 512 B of SRAM, and a 20 MHz internal oscillator into a breadboard‑friendly 8‑pin DIP package. Fully compatible with the Arduino IDE, it lets you program the chip with the same simple, sketch‑based workflow used for Arduino Uno, while delivering the low‑power efficiency and speed needed for real‑world embedded applications.

What students will learn
Working with the ATtiny85 introduces learners to the fundamentals of microcontroller architecture, pin‑mapping, and low‑power design. Students will gain hands‑on experience in:

• Writing and uploading Arduino sketches to a non‑Arduino board.
• Configuring timers, PWM, analog‑to‑digital conversion, and interrupt handling on a resource‑constrained device.
• Optimizing code for size and power consumption, and using the chip’s sleep modes for battery‑operated projects.

Key features

• 8 KB In‑System Programmable Flash, 512 B SRAM, 512 B EEPROM
• 20 MHz internal oscillator (optional external crystal)
• Ultra‑low power consumption with multiple sleep modes (down to 0.1 µA)
• 6 configurable I/O pins, built‑in ADC, PWM, USI (SPI/I²C) and watchdog timer
• Easy programming via Arduino IDE or ISP, with extensive community libraries and examples

Why it’s great for DIY and learning
The ATtiny85‑20PU’s small footprint and inexpensive price make it perfect for prototype boards, wearable gadgets, sensor nodes, and hobbyist robots. Its Arduino compatibility lowers the entry barrier, while the ability to program directly in C/C++ offers a pathway to more advanced embedded development. Whether you’re building a simple LED flasher or a complex, battery‑powered IoT sensor, the ATtiny85 gives you the performance, flexibility, and learning depth you need in a single, pocket‑sized chip.