Simple SMD LED tester

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This project is a simple LED tester and LED polarity checker. It can be used to check 1206, 0805, 0603 and 5mm LEDs. All parts are readily available and they are very cheap.

Description

Usage is very simple. Just press the tack switch to first check the battery is good. The blue led will turn on. Now you are ready to test your leds and check their polarity.

schematic

I always use this every time I want to use leds in my designs as in the past I have used faulty leds and even found incorrectly marked polarity on leds. This reassures you each led you use is 100% working and polarity is correct. So this can save you loads of unnecessary fault checking later on.

The schematic and PCB are designed using Fritzing Software and files are available an the bottom of the page.

Main Parts

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Photos

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PCB

Comments

  • Keith

    Hi,

    I know you give every step on how to make this, but is there any where I can buy one pre-made?

    Best regards

    3 years ago
  • Electronics Lab

    You can try to email the author to check if he has some spare boards.

    3 years ago
  • Shai

    You can have the boards made on oshpark and order the components and make it yourself.

    3 years ago
  • John Aero

    I would not suggest contacting the author as he is a scammer. Ask everyone who backed this on Kickstarter (https://www.kickstarter.com/projects/955316598/simple-led-tester-every-lab-should-have-one-0/comments).

    3 years ago
  • Starbase101

    Only tests 3 out of 21 different SMD package sizes. I’m designing a more robust tester that will cover all sizes.

    2 years ago
    • admin

      Thanks for your input. Would you like your tester to be published on elab? If yes, you can use the contact form and contact us.

      2 years ago

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