ATtiny85 Microcontroller Overview
The ATtiny85 is a versatile, low-power, 8-bit microcontroller perfect for small embedded systems and DIY electronics projects. Its compact size and robust features make it a favorite among makers and engineers.
Specifications
- CPU: 8-bit AVR RISC architecture
- Clock Speed: Up to 20 MHz
- Flash Memory: 8 KB
- SRAM: 512 bytes
- EEPROM: 512 bytes
- I/O Pins: 6 GPIO pins
- ADC: 10-bit ADC with 4 channels
- Communication: SPI, I2C, and USART interfaces
- Operating Voltage: 2.7V to 5.5V
Key Features
- Supports PWM output for LED dimming and motor control
- 10-bit ADC for accurate analog sensor readings
- Compact DIP-8 or SOIC-8 package, ideal for tight spaces
- Ultra-low power consumption with multiple sleep modes
- Arduino IDE compatibility for quick prototyping
- Internal 8 MHz oscillator, eliminating the need for an external crystal
Applications
The ATtiny85 is widely used in small-scale projects where space, power efficiency, and simplicity are crucial. Typical applications include:
- Wearable Electronics: Smart bands, fitness trackers
- Portable Devices: Battery-operated gadgets and toys
- LED Lighting: Advanced lighting effects and dimming controls
- Sensor Monitoring: Data logging and environmental sensing
- Home Automation: Basic IoT devices and automation systems
Programming
The ATtiny85 can be programmed using a variety of methods, making it accessible for both beginners and experienced developers:
- Arduino IDE: Easily program the ATtiny85 by adding the required board package and using an Arduino board as an ISP programmer.
- AVR Programming Tools: Use AVRDUDE, USBasp, or AVRISP for low-level programming and debugging.
- Bootloader Support: Load code directly without requiring an external programmer.
Workflow
- Install the necessary drivers and libraries for the ATtiny85.
- Write and compile your code using Arduino IDE or an AVR toolchain.
- Connect the ATtiny85 to your programmer (e.g., Arduino as ISP, USBasp).
- Upload the firmware to the microcontroller and test your setup.
The ATtiny85 supports ISP (In-System Programming), making it easy to integrate into your projects.