SPECIFICATIONS

 Introduction

Hereby declare: this version is an optimization of the original version, mainly designed for customers who have high requirements for product quality and functions. it not only ensures complete compatibility with the original version, but also makes it easier for everyone to use
Open-source schematics and development software interfaces are available for free download. you can also modify them according to your specific needs. the download process is simple and convenient. easily connect sensors and a variety of electronic components (such as leds, buzzers, buttons, photoresistors, etc.) to create all sorts of fun projects
Advantages:
1. it solves the incompatibility and instability of the traditional uno board on win7 and win8 systems. 2. it adds a pin socket to facilitate everyone to use dupont lines
3. replaced 16u2, reducing the cost to half, and consumers get great benefits
Performance description:
Digitall/0 digital input/output terminals total 0~13. analog i/0 analog input/output terminals total 0~5. supports isp download function
Input voltage: no external power supply is required when connected to the computer usb, external power supply 5v~9v dc voltage input
Output voltage: 5v dc voltage output and 3.3v dc voltage output

Arduino uno improved board   

Uno r3 development board

Arduino uno development board