This module is a boost module based on MC34063 power chip, which can be used to drive low-power devices such as VFD screens.
The circuit diagram is drawn according to the typical application diagram in the data sheet, and you can choose to weld an adjustable resistor to adjust the output voltage or a fixed voltage. Be careful that the output current does not exceed 300mA, otherwise the module will heat up.
If you need to output a large current, you can use the following circuit diagram to increase the load capacity:
PCB:
fixed voltage 12V:
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