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ARDUINO TUTORIAL 04: Relays (Control 120V – 12V Devices )

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Arduino Tutorial

In this exciting episode we continue to explore the possibilities of the Arduino Prototyping Platform. This episode features an in depth tutorial on how to incorporate Relys into your arduino project.

By the end of this episode you will be a relay pro!

Parts Needed:

• ARDUINO UNO
• RELAY
– https://www.sparkfun.com/products/100
• 20 JUMPER WIRES
• BREADBOARD
• 330 Ohm RESISTOR
• NPN 2N222 TRANSISTOR
– http://www.radioshack.com/product/index.jsp?productId=2062586
• DIODE 1N4007 RECTIFIER – 1A 50V
– https://www.sparkfun.com/products/8589

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Duration : 0:9:23


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13 responses to “ARDUINO TUTORIAL 04: Relays (Control 120V – 12V Devices )”

  1. LifeStalkerInANut Avatar
    LifeStalkerInANut

    great video, I got …
    great video, I got a raspberry pi but? I’m interested in buying an Arduino Uno to expand my home projects capabilities. Your videos help a lot for a beginner like me, thanks!

  2. Roman Kozak Avatar
    Roman Kozak

    Vadet? Kalisi: The …
    Vadet? Kalisi: The transistor is needed because the arduino cannot supply enough current to switch the relay. About PWM I am not sure but I suppose it is possible.

  3. vadet kalisi Avatar
    vadet kalisi

    Ok my question is …
    Ok my question is why u r using transistor and relay same time? one? of them isnt enough? and the second question about pwm? can u use pwm signal when u r usng relay?

  4. Ami Khimji Avatar
    Ami Khimji

    Great video? thanks
    Great video? thanks

  5. Bryan Galle Avatar
    Bryan Galle

    You can if you use …
    You can if you use a relay that’s? rated for 220v.

  6. tefras14 Avatar
    tefras14

    That was really …
    That was really helpful thanks? bro

  7. MAS Avatar
    MAS

    Can i? commande a …
    Can i? commande a 220v alternative lamp with this relay ?

  8. Roman Kozak Avatar
    Roman Kozak

    A wall adapter 120 …
    A wall adapter 120 V AC > 12? V DC

  9. Interaksjon Kultur Avatar
    Interaksjon Kultur

    Hey 🙂
    What did …
    Hey 🙂
    What did you? connect the cables going to 12 V to?

  10. Roman Kozak Avatar
    Roman Kozak

    Thanks Ronn for …
    Thanks Ronn for providing suggestions on how to improuve! I have? also been looking into using transistors instead of diodes.

  11. Ronn Folk Avatar
    Ronn Folk

    Roman, well done.
    …
    Roman, well done.
    A few thoughts:
    Polarity is important on the diode. This diode will reduce inductive kickback from the coil. A resistor or zener diode can be placed in series with the flyback diode to use up the stored energy? quicker.
    Great job!
    -Ronn

  12. Roman Kozak Avatar
    Roman Kozak

    Thanks? Nalin!
    Thanks? Nalin!

  13. Nalin Perera Avatar
    Nalin Perera

    Very well explained …
    Very well explained :)?

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