Seeed 101020073 Grove - Electromagnet Holds Up to 1KG @ 5V 400mA

Seeed Grove Motion Sensor, Control and Actuator Modules - Seeed Studio 101020073, The Grove Electromagnet from Seeed Studio will hold up to 1kg when energised with only 400mA at 5V DC. Because this current is beyond the capability of most microcontrollers there is an on-board logic MOSFET that can be switched on by a low-current logic signal. Seeed 101020073 Grove - Electromagnet Holds Up to 1KG @ 5V 400mA

Price: 10.79 from Rapid Online Rapid Electronics Ltd.