How to Sew StitchLits

Step 3 Get to know the polarity of your components.

Both the battery holder and the LEDs have positive and negative sides. It is very important that you connect the negative side of your LEDs to the negative terminal of the battery holder. The same goes for the positive. LEDs are polarized, which means they only work in one direction, so if you make the wrong connections your LEDs will not light!