Learn how to light up a necklace or bracelet!
What You'll Need
Teknikio RGB LEDboard, Teknikio Batteryboard, Coin-cell Battery, Conductive Yarn, Waxed Cotton Cord, Beads, & Metal Lobster Clasp
Scissors, Ruler or Soft Tape Measure, & Bead Board
Step 1: Plan Your Circuit
Our circuit contains an RGB LEDboard, a batteryboard, and a lobster clasp. The clasp is made of conductive metal, meaning electricity can flow through it. In the circuit, the clasp acts as a switch to turn the light off and on.
Connect the clasp to one of the holes marked “R” (red), “G” (green) or “B” (blue) to turn on the LED. Switching the clasp to different holes with change the color of the LED.
Step 2: Measure Your Wrist (Bracelet Only)
Start by determining how big your bracelet will be. Measure your wrist using a soft tape measure or using the provided cord and a ruler.
To use the cord, wrap the provided cord around your wrist snugly, like a bracelet. Mark the spot of the cord where it begins to overlap by holding the spot between your finger and thumb. Lay the string out flat against a ruler to measure the length.
Once you know your wrist size, add ½ - 1 inch to this size depending on how tight or loose you’d like it to fit. Our bead board will help you design bracelets approximately this size
Small: 6.5 inches
Medium: 7 inches
Large: 8 inches
* Small fits most kids 12 and under.
Step 3: Design Your Bracelet or Necklace
Using your bead board as a guide, place beads in the grooves associated with your chosen size. For example, if you chose to make a small bracelet, fill just the two grooves labeled “S”. For a necklace, fill both long grooves.
You can place your RGB LEDboard and batteryboard on your bead board while you design.
Step 4: Prep Cord
Cut equal-sized pieces of cord and yarn. For the bracelet cut 12 inches of each, and for the necklace cut 20 inches of each.
Twist the conductive yarn and cord together so that they are wrapped tightly around each other. The wax on the cord should keep the conductive yarn in place. If they start to come apart, just twist them together more. You may also add a drop of glue to the end.
Fold the twisted cord in half and cut the cord so you end up with two pieces that are the same length.
Step 5: Attach Cord on Batteryboard
Take one of your twisted cord pieces and tie a double knot to the batteryboard through one of the holes marked with “+”.
Step 6: Bead Positive “+” Side of Batteryboard
Slide your beads onto this cord. Make sure you are sliding the beads over both the conductive yarn and the waxed cord. If they start to separate, hold both tips together and twist them together again.
Secure the beads by sliding all the beads towards the batteryboard, then tie a single knot on the other end of the beads. Add the clasp to this end by tying a square knot around the ring.
Step 7: Bead Negative “-” Side of Batteryboard
Take the second piece of twisted cord and tie one end of it to the batteryboard through one of the holes marked with “-”. We recommend using the hole located diagonally from where you tied the other cord, but either hole will work.
Slide your beads onto this cord. Secure the beads with a single knot.
Then tie the negative hole on the RGB LEDboard to the end using a square knot.
Step 8: Test Your Circuit
Now you can add your battery.
Attach your clasp to each of the holes marked with “R” (Red), “G” (Green), and “B” (Blue). The LED should light up with the corresponding colors.
The LED will flicker as you move because the clasp is not tied or connected to the batteryboard the way the conductive thread is on the other side. As the clasp wiggles around, it might lose connection to the RGB LEDboard and then connect again, resulting in a flickering effect. You can limit the amount of flickering by tightening your bracelet or necklace so that the clasp stays in a position where it is constantly touching the batteryboard. Be careful not to over tighten, make sure it is comfortable to wear!