This design uses MT3608 as the core. The main advantage is small size. Able to achieve current boost of more than 1A. And some circuit space constraints were taken into consideration during the design process. So it is designed to be 3-pin modular. Easy to expand the scope of use. This allows this circuit to be used in a variety of situations. And this circuit is easy to change the voltage. When designing, R3 is a 1k resistor. You can change the output voltage by changing the resistance of R2. The formula is: Vout=0.6 (1+R2/R3). The board testing is normal and there are no pitfalls.
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