The Arduino Uno SMD R3 is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
The Arduino Uno SMD R3 is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
The Arduino Uno SMD R3 is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
The Arduino Uno SMD R3 is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
Last updated at 06/18/2026 06:20:20
Arduino A000073 Original Arduino Uno R3 SMD, Green
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Arduino UNO Rev3 SMD
Delivery $9.90
Arduino Uno SMD Rev3
Delivery between Mon – Tue $6.95
originally posted on arduino.cc
Great product and packaging
originally posted on arduino.cc
Great little board. Love these things!
originally posted on arduino.cc
They seem to have this open source thing figured out. Quality hardware, extensive libraries and examples and I am not pulling my hair trying to find solutions. Refreshing.
| Microcontroller | ATmega328 |
| Operating Voltage | 5V |
| Supply Voltage (recommended) | 7-12V |
| Maximum supply voltage (not recommended) | 20V |
| Digital I/O Pins | 14 (of which 6 provide PWM output) |
Arduino A000073 Original Arduino Uno R3 SMD, Green
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Arduino UNO Rev3 SMD
Delivery $9.90
Arduino Uno SMD Rev3
Delivery between Mon – Tue $6.95
Great product and packaging
Great little board. Love these things!
They seem to have this open source thing figured out. Quality hardware, extensive libraries and examples and I am not pulling my hair trying to find solutions. Refreshing.
Great response time. I ordered the boards and they shipped within 48 hours (I think within 24 but I don’t exactly remember). This was a lifesaver, especially in the midst of a supply chain shortage for electronics.
I ordered 35 Arduino Uno's they came within a week
None
| Microcontroller | ATmega328 |
| Operating Voltage | 5V |
| Supply Voltage (recommended) | 7-12V |
| Maximum supply voltage (not recommended) | 20V |
| Digital I/O Pins | 14 (of which 6 provide PWM output) |
