In this post, I will demo how to weld the drawdio.

Step 1

First we need to prepare the hardware as the following.

Step 2

We will weld Resistance -> Ceramic capacitors -> Electrolytic capacitor -> Transistor -> IC -> Horn -> Battery holder in a line

Show as the video

Step 3 result show

Use one hand to press the paper, and another hand to write with the pencil, when you write, you will hear the sound from the horn.

Notice: make sure the hands make a circle, one hand touch the paper another control the pencil.

As the video show