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This Velleman MK198 LED Buddy Electronics Solder Project Kit 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 MK198 Mini Kit compact size and durable materials ensure that this useful tool is the best buddy any maker can have. No more circuit troubles!
Velleman Kits part number MK198