ATTINY1616-UNO

This project is a modernized version of an Arduino Uno clone, enhanced in several key areas. At its core, it doesn’t use the classic ATmega328P like the original Uno, but instead features the more powerful and modern ATTiny1616 microcontroller in a compact QFN package. This chip offers better performance, more memory, improved peripherals, and more efficient power consumption. The QFN form factor also allows for a more compact and professional PCB layout.

The board is equipped with a variety of useful components that greatly expand its capabilities. One of these is an onboard temperature sensor, which allows the microcontroller to measure ambient temperature. This makes the board well-suited for applications in home automation, environmental monitoring, climate control, or any project where temperature data is relevant.

For visual feedback, a Neopixel (an addressable RGB LED) is included. This allows the system to output colorful visual signals – from simple status indicators to animated light effects. Neopixels are especially useful in interactive projects or when clear, visible feedback is required.

The board also includes a small relay. It's important to note, however, that this relay is intended only for low-voltage applications, as it lacks galvanic isolation. It should not be used to switch mains power or high-current loads. Instead, it’s suitable for low-voltage control tasks, such as switching small modules, triggering signals, or driving low-power devices within a safe voltage range.

Additionally, a small onboard buzzer has been integrated. This component can be used for audible feedback – such as alert sounds, confirmation beeps, or basic tone signals. When combined with the Neopixel, the board can provide both visual and audible indicators, making it highly interactive and user-friendly.

Another standout feature is the inclusion of a USB-C port. Unlike the outdated USB-B connector on the classic Uno, USB-C is compact, reversible, and widely supported. It serves both for programming and power supply, making the board more convenient to use with modern cables and devices.

Overall, this board is a thoughtfully upgraded, Arduino-compatible platform that combines a modern microcontroller with integrated sensing, sound, and light output. Its clean layout, USB-C support, and additional onboard features make it an excellent foundation for a wide variety of electronics projects – ideal for hobbyists, makers, and developers looking for something more capable than a standard Uno.