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Conductive Sewing Keychain

This project is designed for beginner students. It requires basic knowledge about circuits and sewing.
Difficulty: Easy
Cost: Low
Time: 15 - 20 minutes

 

 

STEP 1: Gather Materials

All parts for this project, as well as Starter Sewing Supplies and E-Textile Starter Pack, can be found at Brown Dog Gadgets.

Tools:

Scissors

Needles

Materials:

Felt

Regular Thread

Keychain Ring

Parts:

Conductive Thread

Battery Holder

Battery

LEDs: GreenAmberRed

STEP 2: Design Your Keychain

Design your keychain first. Doing the design first makes it easier on yourself.

STEP 3: Layout Parts

You should have the negative end of the LED light and the battery holder facing one way (facing left or right).

This leads to the positive ends facing the opposite direction of the negatives. (facing left or right; opposite of negatives).

The battery holder will be hidden on the back side of the keychain with a cover over the battery.

The LED lights will be on the top side of the keychain for people to see the lights shining!

STEP 4: Cut Thread, Thread Needle, Knot Thread

1. Cut conductive thread about 1 foot.

2. Thread the needle with conductive thread. Ask for help, if needed.

3. Tie a knot in the thread on the opposite end of the needle (knot three times). The purpose of tying a knot is to stop the thread from pulling all the way out of the material.

STEP 5: Secure Negative LED 

You are going to connect all the negative ends together first.

Use conductive thread! The LED will go on the front side of the keychain so no one will see it. Opposite of the LED.

1. Pull the needle from the back side of the keychain to avoid seeing the knot. Push down the hole and loop three times.

2. Sew towards the battery holder with the same thread.

STEP 6: Connect Negative LED to Negative Battery Holder

The battery holder negative end should be facing the same direction as the negative LED.

1. Using the same thread, sew through the hole of the battery holder and loop three times.

2. After looping three times, tie a knot and cut the thread (knot three times).

STEP 7: Secure Positive LED

REPEATING STEP 5 for Positive End

You now are going to connect all the positive ends together.

All instructions are repeated below.

1. Pull the needle from the back side of the keychain to avoid seeing the knot. Push down the hole and loop three times.

2. Sew towards the battery holder with the same thread.

STEP 8: Connect Positive LED to Positive Battery Holder

REPEATING STEP 6 for Positive Ends

All instructions are repeated below.

The battery holder positive end should be facing the same direction as the positive LED.

1. Using the same thread, sew through the hole of the battery holder and loop three times.

2. After looping three times, tie a knot and cut the thread (knot three times).

STEP 9: TEST

Insert the battery in the battery holder and test out the lights!

Your LEDs should all light up.

If not, figure out why.

Do you have a Short Circuit?

Do you have a backwards LED?

STEP 10: Cover Battery Holder

No one wants to see a battery on a keychain, so we have added a step on covering your battery.

1. Cut a piece of felt big enough to cover the battery holder and to sew the material around it.

2. Thread the needle with thread and make a knot on the opposite side of the needle in the thread (knot three times).

3. Sew it on, tie a knot, and cut the thread (knot three times)!

STEP 11: Puncture Hole and Insert Key Ring

In order to insert a keychain ring, you have to make a hole to put it through. You can use a scissors or whatever tool you feel will work. You may need help with this step, so do not be shy and just ask!

Insert the key ring by splitting the two ends apart. This is another step that you may need help with.

STEP 12: Finished