LED Polarity Detection Device

Telling Anode from Cathode

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Support device for testing/orienting LED's for the SMD Solder Challenge.
  • 1 × CR2032 Battery Holder
  • 1 × CR3032 Battery
  • 1 × Resistor LED Current Limiter

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mscott wrote 01/11/2019 at 19:12 point

The internal resistance of a 2032 coin cell is high enough that the resistors aren't necessary.

Simply slide the cell between the LED leads and the LED will light when the polarity is correct.

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raylearmond wrote 01/09/2019 at 20:39 point

Why don't you include the resistor size in the Components?  Colors are deceiving.  

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Mike Szczys wrote 01/08/2019 at 14:44 point

These really saved our butts at Supercon for the SMD challenge. Thanks for digging into your personal stash and putting these together!

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