FR4 Copper Clad Plate Laminate Single Side PCB [C] Jumper Wires The steel has a permeability

The steel has a permeability many times that of free space and the core thus serving to greatly reduce the magnetizing current and confine the flux to a path that closely couples the winding

you can use external supply or connect +5V and GND pin of Arduino

Buttons Control Audio Recording Method of Operation

Built-in output short protection function

and a brown-out reset

FR4 Copper Clad Plate Laminate Single Side PCB [C] Jumper Wires The steel has a permeabilityFR4 Copper Clad Plate Laminate Single Side PCB is made up of a glass fiber epoxy resin based. One side of this PCB has copper foil on it. The epoxy optical fiber forms the substrate on which the copper foil is hot pressed only on one side and therefore the other side remains bare. It has a copper core for strength and therefore the substrate acts as electrical insulation. The PCB is ideal for prototyping and experimenting. This PCB use almost in every