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Choosing the real Arduino Uno R3 means you're getting the microcontroller board that's been checked a lot, so it's less likely to have problems. It also comes with official help, like a lot of useful guides and forums online, to help you start your projects and fix any issues you might have.
The Arduino Uno Rev3 board can be powered via a USB connection or with an external power supply. The power source is selected automatically.
External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or a battery. The adapter can be connected by plugging a 2.1mm centre-positive plug into the board's power jack. Leads from a battery can be inserted in the GND and Vin pin headers of the POWER connector.
The board can operate on an external supply from 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts.
The power pins are as follows:
Explore a wide range of Original Arduino Boards on Robocraze.
The original Arduino Uno R3 microcontroller board is one of the best microcontrollers available today. Its unbeatable price makes it a go-to choice for both professionals and hobbyists alike.
We are proud to provide this product with professional customer service and after-sales support that help you get your project up and running in no time! With its large community base ready to answer any queries you may have, reliable components, as well as easy programming options making use of popular development software like C++ & Python – this board will suit almost every purpose out there giving great results without breaking the bank!
Arduino Model |
Uno R3 |
Microcontroller |
ATmega328 |
Operating Voltage |
5V |
Supply Voltage (recommended) |
7-12V |
Maximum supply voltage |
20V |
Digital I/O Pins |
14 (of which 6 provide PWM output) |
Analog Input Pins |
6 |
DC Current per I/O Pin |
40mA |
DC Current for 3.3V Pin |
50mA |
Flash Memory |
32 KB of which 0.5 KB is used by the bootloader |
SRAM |
2KB |
EEPROM |
1KB |
Clock Speed |
16MHz |
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