Arduino
Arduino UNO R3
HUK-54209
The classic Arduino board: ATmega328P at 16MHz with 14 digital I/O pins, 6 analogue inputs and USB-B, in a removable DIP package.
Back in stock soon£24.40£20.33£20.33 ex VAT£24.40 inc VAT
Notify me
Arduino
Arduino UNO R3 SMD
Arduino UNO R3 with a surface-mount ATmega328P, for builds where the microcontroller stays on the board.
Temporarily out of stock · back soon£23.15£19.29inc VATex VAT
£19.29 ex VAT£23.15 inc VAT
Free UK delivery over £100. Next working day available.
14-day returns on unopened items.
VAT invoice emailed with every order. Trade accounts available.
Product information
Arduino UNO R3 SMD is functionally the same as the classic UNO R3, with 14 digital I/O pins (6 PWM), 6 analogue inputs, a 16MHz resonator, USB, a power jack and an ICSP header, but its ATmega328P is a surface-mount part soldered to the board.
It suits projects and products where the microcontroller never needs swapping, and it works with the same shields, libraries and examples as UNO R3.
Key features
- Microcontroller: ATmega328P
- Operating Voltage: 5V
- Input Voltage (recommended): 7-12V
- Input Voltage (limit): 6-20V
| Microcontroller | ATmega328P |
|---|---|
| Operating Voltage | 5V |
| Input Voltage (recommended) | 7-12V |
| Input Voltage (limit) | 6-20V |
| Digital I/O Pins | 14 (of which 6 provide PWM output) |
| PWM Digital I/O Pins | 6 |
| Analog Input Pins | 6 |
| DC Current per I/O Pin | 20 mA |
| DC Current for 3.3V Pin | 50 mA |
| Flash Memory | 32 KB (ATmega328P) of which 0.5 KB used by bootloader |
| SRAM | 2 KB (ATmega328P) |
| EEPROM | 1 KB (ATmega328P) |
| Clock Speed | 16 MHz |
| LED_BUILTIN | 13 |
| Length | 68.6 mm |
| Width | 53.4 mm |
| Weight | 25 g |
| Manufacturer | Arduino |
| Manufacturer part no. | A000073 |
| Hossam UK code | HUK-29965 |
| Standard UK delivery | £3.95, free on orders over £100. Delivered in 2–3 working days. |
|---|---|
| Next working day | £6.95. Order by 2pm, Monday to Friday. |
| Returns | Return unopened items within 14 days for a full refund. Faulty items are covered by the manufacturer’s warranty. |
| WEEE | We offer free take-back of old electrical equipment when you buy a similar item. |
Frequently bought with this
Arduino
Arduino UNO WiFi Rev2
HUK-45824
UNO-format board with an ATmega4809, a u-blox NINA-W102 radio for Wi-Fi and Bluetooth LE, an IMU and a crypto chip.
Back in stock soon£48.88£40.73£40.73 ex VAT£48.88 inc VAT
Notify me
Arduino
Arduino UNO R4 Minima
HUK-15183
32-bit UNO: Renesas RA4M1 Arm Cortex-M4 at 48MHz with 256KB flash, USB-C, a DAC and CAN, keeping the UNO shape and 5V logic.
Back in stock soon£18.31£15.26£15.26 ex VAT£18.31 inc VAT
Notify me
Arduino
Arduino UNO R4 WiFi
HUK-16935
UNO R4 with an ESP32-S3 for Wi-Fi and Bluetooth, a 12×8 LED matrix, a Qwiic connector and USB-C.
Back in stock soon£25.39£21.16£21.16 ex VAT£25.39 inc VAT
Notify me