technical parameter
Model: Small Hammer UNO Development Board
Microcontroller ATmega328P
Working voltage 5 V
Input voltage (recommended) 7-12 V
Input voltage (limit) 6-20 V
Digital I/O pin 14
PWM channel 6
Analog Input Channel (ADC) 6
Each I/O has a DC output capacity of 20 mA
3.3V port output capacity 50 mA
Flash 32 KB (where the bootloader uses 0.5 KB)
Clock speed 16 MHz
On board LED pin 13
Length 68.6 mm
Width 53.4 mm
Weight 25 g

Digital port: Digital I/O digital input/output ports 0 to 13
Analog port: Analog IN Analog input ports A0~A5
Special ports: PWM modulation output ports 3, 5, 6, 9, 10, and 11
Power output: Supports 5V and 3.3V outputs
Power input: USB port (5V) or DC port (7-12V) voltage input
On board reset: The development board has integrated a reset circuit with a reset switch
Firmware update: onboard ICSP interface, support for real connection with other firmware updates
Product dimensions: (length) 75.0mm * (width) 74.0mm * (height) 15.0mm

-Main use:
Maker learning and entry-level development.

Shipping list:
Small hammer UNO board card X1
USB square cable X1

Application scenario examples:
The Arduino DIY (small fan, bubble machine) is so easy and simple, without the need for extra modules. It is easy to connect and use, with forward and reverse rotation, fast and slow, as you please. List of application scenarios for bubble machines and fire extinguishers.