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The LED Buddy can help you to design any electronic circuit that includes one or more LEDs.

Hold any type of LED to the contact pads of the LED Buddy to start the process. It detects the polarity of the LED, measures the forward voltage and auto-calculates the series resistors that you need to use.

The compact size and durable materials ensure that this useful tool is the best buddy any maker can have. No more circuit troubles!


  • 8 x 2 character LCD
  • auto-calculates the series resistor (E12 series)
  • detects a LED's polarity
  • measures the LED's forward voltage
  • adjustable target current
  • adjustable target voltage
  • contact pads
  • power switch


  • size: 75 x 32 x 48 mm (W x L x H)
  • calculated voltage adjustable from: 0 - 30 V
  • calculated current adjustable from: 2 - 26 mA
  • current consumption: 40 mA (when testing a LED)
  • power supply: 9 to 12 VDC max. or 9 V battery (not incl.)

Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to:

All registered trademarks and trade names are properties of their respective owners and are used only for the clarification of the compatibility of our products with the products of the different manufacturers.
Due to constant product improvements the actual product appearance might differ from the shown images. Product images are for illustrative purposes only.

USA - English (UK)