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Arduino base knowlage
Q:How to use the breadboard?
A:Please refer to the link:https://electronicsclub.info/breadboard.htm

Q:What software is arduino programming?
A:Need to use arduino IDE, software download address: https://www.arduino.cc/en/Main/Software

Q:Arduino can't update the driver(Windows OS)
A:Please refer to https://www.arduino.cc/en/Guide/UnoDriversWindowsXP to install the driver.
 
Arduino LCD2004 screen
Q:LCD2004 black screen
A:Please pay attention to the correct wiring of the positive and negative poles

Q:LCD2004 screen display is not clear
A:Rotate the buttons behind the screen to adjust the screen backlight

Q:LCD2004 cannot display characters
A:Our products have two IIC addresses, 0x3F and 0x27, please test the IIC address in the program and test it.
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