Relay Board for Arduino for Less Than $8.

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Introduction: Relay Board for Arduino for Less Than $8.

Hi friends, today I am going to tell you how to make a relay board for Arduino for less than $8. In this circuit, we are not going to use any IC or transistor.So, let's do it!!!

Step 1: Gather the Parts-

Step 2: Gather the Tools-

Soldering Gun.

Step 3: Draw the Schematic-

Step 4: Solder the Components As Shown in Circuit-

Step 5: Comparison-

Thank you!!!

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    5 Discussions

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    user
    soardr

    2 years ago

    Thank you for making me alert about the danger. But, when I connected the relay board to my Arduino, I saw that nothing happened to my Arduino. I connected it many times but, nothing happened.

    It is risky to connect that relay board to your Arduino.
    Arduino pins are 40mA MAX.
    Relay can draw up to 100mA. That's why transistors are obligatory!!!!

    great post. would be helpful if the pictures of the parts list had names with them possibly. then it would be easier to find for those of us that don't know them. thanks for the info.

    1 reply

    If you will click the image, the picture will appear with a box around it. Move the mouse pointer over the box to get it's name.

    Nice relay board. Much cheaper than the commercial relay shields.