LCD1602 expansion board based on CH552T_Beggars’ Edition

Cloned from the LCD1602 expansion board based on CH552T - Lichuang EDA open source hardware platform (oshwhub.com)

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Updated on July 7, 2021

I went through the circuit again, reduced the board area, made a purple version, and added power supply options for pins 1 and 2. To drive the Laowang 1.2 screen, connect the pins in the vertical direction, and if the wire sequence is normal, connect them in parallel.

In addition to Lao Wang Ping, I also found two 14-pin screens with backlights in the seafood market and Zhixin Electronics. The characters in the photos taken with the mobile phone are blurred. They have the same line sequence as Lao Wang. The red characters on the black background are too good to look at.

Directly solder it with 8.5mm pin headers, not ready to be used for other purposes.

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Effect

If you need to download, just short-circuit dp and 3.3v. I modified it using the current and voltage measuring instrument sold by Lao Zheng before. Just add a button as shown in the picture.