Step 1: Materials
1 CR2302 coin cell battery
1 battery holder
1 yd conductive thread
1/4 sheet white felt (for skull)
1/4 sheet orange felt (for pumpkin)
2 x 1/4 sheet black felt (for background)
black embroidery floss
sewing needle (note: the eye needs to be small enough to fit through the battery holder)
pattern for skull and pumpkin [pdf]
1 set of alligator clips (to test the circuit)
chalk (for marking the black felt)
puffy paint or clear nail polish (for preventing the conductive thread from fraying)
Step 2: Test Your Circuit (optional)
Below are figures showing how to test your circuit. The LED circuit is one the we just built. The colors represent alligator clips.
Now, connect your two LEDs in series. The negative side of one LED is connected to the positive side of the next. What happens? The LEDs will not turn on because the battery doesn't have enough vlotage.
Now, connect your two LEDs in parallel. In this case, the positive sides of the battery and two LEDs are connected together. The negative sides are connected too. Now what happens? Both LEDs should light up.
You will be sewing your LEDs in parallel for your pumpkin or skull.
Step 3: Cut Your Pattern and Felt
Use the paper pattern as a template and cut your shape from felt.
Use the chalk to outline the eyes on the black felt (optional). This will help you place the LEDs.
Step 4: Sew LEDs to Felt
With the conductive thread, sew the positive ends together. Sew into each component 2-3 times. Sew them down tight!
Cut the thread.
Sew the negative ends together.
Make sure the positive and negative ends of the thread are separate! If they touch, your LEDs will not light up.
Step 5: Sew Battery Holder to the Back
Snip the tails of your conductive thread so it doesn’t touch the battery. You can use puffy paint or clear nail polish to coat the ends.
Step 6: Troubleshooting and Finishing
Does your circuit flicker? Your components may be too loose. Sew them down tighter.
Do the tails of your conductive thread touch the battery? Cut them shorter.
Did you cut your thread when you sewed your LEDs? Positive and negative should not be touching each other.
Glue or sew the face to the felt.
Attach a embroidery floss for hanging. Or use magnets and stick your creation to the fridge, suction cups for the window, or safety pins to hang it on the curtains.
If you enjoyed this tutorial, check out my other e-textiles kits at www.bitwiseetextiles.com. Happy Halloween!