Arduino UNO Rev 4
Finally, after several years Arduino offers us a new version of the very famous Arduino UNO board now in its fourth revision. This new board, extremely enhanced and improved in its technical characteristics, is presented on the market in two different versions:
- Arduino UNO R4 Minima
- Arduino UNO R4 WiFi
In this article we will see the UNO R4 Minima version in detail, while for the other card I suggest you go and read this other article.
The new technical features
The Arduino UNO R4 Minima features a powerful 32-bit microcontroller courtesy of Renesas. Compared to the old Rev 3, you therefore have greater processing power, expanded memory and a completely new level of integrated peripherals. In addition to the upgraded microcontroller, this board has more memory and a faster clock. This allows you to develop more complex projects than the previous version.
But the good thing is its portability: compatibility with the schematics and accessories used in the old Rev3 version remains intact and no changes need to be made. The operating voltage remained at 5V! However, in addition to the old integrated peripherals, this board introduces new ones, such as a 12-bit DAC, a CAN BUS, an OP AMP and a SWD connector. This expands the overview of the possible applications of this card.
Another feature introduced with this new revision is the possibility of using power supplies up to 24V. This extends the possibility of integrating motors, LED strips and other actuators into our projects, using a single power source and thus simplifying the realization of our projects.
But the series of innovations introduced in this sheet does not end here. The UNO R4 comes with built-in HID (Human Interface Device) support. So by connecting the board to a computer via a USB cable, it will be possible to simulate a mouse or keyboard within our projects, quickly and easily.
So, summarizing here are the main innovations introduced in this new revision:
- Hardware compatibility with UNO R3
- Expanded memory and faster clock
- Extra on-board peripherals (12-bit DAC, CAN BUS, OP AMP)
- Extended 24 V tolerance
- SWD connector
- HID support
|Board||Name||Arduino® UNO R4 Minima|
|Microcontroller||Renesas RA4M1 (Arm® Cortex®-M4)|
|Pins||Digital I/O Pins||14|
|Analog input pins||6|
|CAN||Yes 1 CAN Bus|
|Power||Circuit operating voltage||5 V|
|Input voltage (VIN)||6-24 V|
|DC Current per I/O Pin||8 mA|
|Clock speed||Main core||48 MHz|
|Memory||RA4M1||256 kB Flash, 32 kB RAM|