An electromagnet is a type of magnet in which the magnetic field is produced by electric current. An electric current flowing in a wire creates a magnetic field around the wire, due to Ampere's law (see drawing below). To concentrate the magnetic field, in an electromagnet the wire is wound into a coil with many turns of wire lying side by side. The magnetic field of all the turns of wire passes through the center of the coil, creating a strong magnetic field there. Grove - Electromagnet can shuck 1KG weight and hold on.
it easy to use, to learn electromagnet principle.
Specification Working Voltage: DC 3.3 /5V
Working Current: 400mA
Standby current: 200uA
Load Weight: 1KG Technical details Dimensions 89mm x140mm x 18.8 mm Weight G. W 34g Battery Exclude Part List Grove - Electromagnet *1