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51 microcontroller I2C thermal printer

 
Overview

There is something wrong with the power supply circuit design of Campus Life Assistant 7 project address
. Currently I am using the inner one, and the outer battery is used for power supply.
You can refer to the circuit design. The program is in the warehouse of "Campus Life Assistant 7". If it comes too early, it may not work. Didn't have time to pass it on
参考设计图片
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