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This app is a collection of basic electronic calculators. It is suitable for hobbyist, electronic engineers or professionals.
It provides you many choices of combination of component value in building Rc filter, voltage divider, monostable, astable , etc.
DC-DC 5V step-up module
The module is used Microchip MCP1640B step-up
(pads vx0 schematic, pcb and BOM)