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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.
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.