The Arduino Uno R3 is the result of Arduino's 3rd revision for the Uno version. In this Arduino Uno R3 Clone product, the ATmega328P DIP case is installed in the circuit. Thanks to this extra case, it offers us the opportunity to buy a new one and install it in the circuit in case of any problems with our microcontroller, as well as to use the ATmega328P that we use to write programs and use it in our DIY projects that we make ourselves.

The difference between the Arduino Uno R3 CH340 SMD and the Arduino Uno Dip is that the microcontroller is Decoupled as SMD or DIP, as well as the DIP type is changeable.

• Microcontroller: ATmega328P
• Working voltage: 5V
• Input voltage (recommended): 7-12V
• Input voltage (limit values): 6-20V
• Digital I/O Pins 14 (6 of them provide PWM output)
• PWM Digital I/O Pins: 6
• Analog Input Pins: 6
• DC current Per I/O Pin: 20 mA
• 3.3V Pin DC current: 50 mA
• Flash Memory 32 KB (ATmega328P) 0.5 KB used by bootloader
• SRAM: 2 KB (ATmega328P)
• EEPROM: 1 KB (ATmega328P)
• Clock Speed: 16MHz
• Length: 68.6mm
• Width: 53.4mm
• Weight: 25 g

Thanks to this sensor holder, you can easily mount the HC-SR501 PIR Motion Sensor.

HC-SR501 motion sensor module does not have any connection apparatus, so you need to fix it. It is made of transparent acrylic material. There are 2 mounting holes at the base and top. It comes with screws and salmon in the package.

Note: There is no sensor in the package. The image is just to show the way of use.