Grove - Electromagnet

Introduction

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 suck 1KG weight and hold on. It is easy to use, to learn electromagnet principle.

Features

• Grove shape
• 1KG peak suction
• Low standby current

Specifications

• Working Voltage ：DC 5V
• Working Current ： 400mA
• Standby current ： 200uA
• Load Weight： 1KG

Platforms Supported

Usage

With Arduino

CODE:

/*
  Turns on an Electromagnet on for one second, then off for one second, repeatedly.
  This example code is in the public domain.
*/

int Electromagnet = 0;
int LED = 13;

// the setup routine runs once when you press reset:
void setup() {
    // initialize the digital pin as an output.
    pinMode(Electromagnet, OUTPUT);
    pinMode(LED, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
    digitalWrite(Electromagnet, HIGH);  // turn the Electromagnet on (HIGH is the voltage level)
    digitalWrite(LED, HIGH);            // turn the LED on (HIGH is the voltage level)
    delay(1000);                        // wait for a second
    digitalWrite(Electromagnet, LOW);   // turn the Electromagnet off by making the voltage LOW
    digitalWrite(LED, LOW);             // turn the LED off by making the voltage LOW
    delay(1000);                        // wait for a second
}

With Raspberry Pi

1.You should have got a raspberry pi and a grovepi or grovepi+.

2.You should have completed configuring the development enviroment, otherwise follow here.

3.Connection

• Plug the sensor to grovepi socket D4 by using a grove cable.

4.Navigate to the demos’ directory:

    cd yourpath/GrovePi/Software/Python/

• To see the code

    nano grove_electromagnet.py   # "Ctrl+x" to exit #

    import time
    import grovepi

    # The electromagnet can hold a 1KG weight

    # Connect the Grove Electromagnet to digital port D4
    # SIG,NC,VCC,GND
    electromagnet = 4

    grovepi.pinMode(electromagnet,"OUTPUT")
    time.sleep(1)

    while True:
        try:
            # Switch on electromagnet
            grovepi.digitalWrite(electromagnet,1)
            print "on"
            time.sleep(2)

            # Switch off electromagnet
            grovepi.digitalWrite(electromagnet,0)
            print "off"
            time.sleep(2)

        except KeyboardInterrupt:
            grovepi.digitalWrite(electromagnet,0)
            break
        except IOError:
            print "Error"

5.Run the demo.

    sudo python grove_electromagnet.py

Resources

• Grove Electromagnet v1.0 SCH PCB.zip
• Datasheet ZYE1-P20-15 PDF

Help us make it better

Welcome to the new documentation system of Seeed Studio. We have made a lot of progress comparing to the old wiki system and will continue to improve it to make it more user friendly and helpful. The improvement can't be done without your kindly feedback. If you have any suggestions or findings, you are most welcome to submit the amended version as our contributor via Github or give us suggestions in the survey below, it would be more appreciated if you could leave your email so that we can reply to you. Happy Hacking!