DIY Wearable Clap Lit Bracelet

Introduction: DIY Wearable Clap Lit Bracelet

About: I dont know Who am I??? I also try to find out the ans of this question since last 20 years..

Clap the light up!! A bracelet that lights up when you clap.

Step 1: Components Needed

  1. Mic (I took it from one of non working earphones)
  2. Potentiometer 10K
  3. Resistance 1k
  4. Colored LEDS – 8
  5. Transparent plastic pipe. (Diameter approx 1 cm)
  6. NPN transistors – 2
  7. 3v lithium cell
  8. Battery cap

Few wires, soldering iron, and a small piece of GPB and there you go!

Step 2: Basic Circuit & Working

Working :

We will use two transistors in cascade to provide amplification of current. Using two transistors will be enough to light up 7-8 leds using just 3v supply.

According to our circuit, the LEDs will glow only when Q2 turns ON, thus providing a ground path to LEDS. Q2 will turn on when Q1 does not conduct. So, we have to set the potentiometer in such a way that when you clap, only at that time the Q1 goes off. This value usually comes in between 4-4.5 k.

Note: Be careful about checking out positive and negative terminals of mic before soldering. Otherwise you may not get the output.

Step 3: Let’s Get Started:

Mount the above circuit on a small piece of GPB. Since we are making a wearable, we will try our best to adjust it all in the smallest size possible. (Image:1)

Cut out the unused portion of the board.

Next, solder the MIC and the battery cap.

And then connect LEDs in parallel.(Image:2)

After connecting it to the circuit, set the potentiometer.

Done?

Place it inside the tube.(Image:3)

We have covered the circuit with a thread. A hole is made in the pipe and ribbon has been taken out from it. A similar hole on the other end, and there you go!!

Step 4: Final Output

Yay! its finally made!! So clap on!

It is combine effort of Me, Jenni Shah, Prachi Parikh and Ishita Shah.

Wear It! Contest

Participated in the
Wear It! Contest

1 Person Made This Project!

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3 Discussions

Hello Anool,
Understood the mistake. I rearrange it and uploaded new circuit.
Thank you.