Instructables

Light Theremin with Magnet Holder

Picture of Light Theremin with Magnet Holder
02.JPG
01.JPG
This is a project developed during our ”Taller de inventos” (August Build Night), sponsored by Instructables and Jameco. You can read more about the event over here.

Here we’ll show you how to make a light theremin that has a

Here's a video of the theremin

Materials

1x Wazzabi Punk PCB
1x Red LED
2x 555 Timer IC
1x On/off Switch
1x 9v Battery
1x 9v Battery Snap
8x Short cables
6x Long cables
1x DVD case
3x Strong magnets (recycled from garbage, don’t know what they were for)

Resistors
1x 330 ohm
1x 1 kohm
1x LDR
1x two axis joystick potentiometer (recycled from a broken USB Gamepad)
1x A50K Potentiometer

Capacitors
10 nF
103 ceramic
104 ceramic
473 ceramic

At the bottom you will find the Fritzing file with the schematics and PCB of the circuit we used.
 
Remove these adsRemove these ads by Signing Up

Step 1: Making the PCB

Picture of Making the PCB
PCB 02.JPG
frits.jpg
The first step of this instructable is printing the PCB. You'll find attached the necessary PDFs.

Since this task excedes our instructable, feel free to follow these instructables instead:
- How to make the PCB board (available in Spanish)
- PCB making guide

We suggest you mark where every component goes with a sharpie marker on the rear side of the PCB.

Step 2: Prepare the two-axis potentiometer from the controller

Picture of Prepare the two-axis potentiometer from the controller
controller (2).JPG
controller (3).JPG
P1020872.JPG
Here we'll be cutting from the main PCB of a broken USB Gamepad the part that we need, namely, the part with the 2-axis potentiometer.

Since we'll be soldering our cables to the PCB, we just need to cut around the potentiometer in any way we find appropriate.

Step 3: Soldering the components

Picture of Soldering the components
solder (2).JPG
solder (3).JPG
solder (4).JPG
solder (5).JPG
solder (6).JPG
solder (7).JPG
P1020876.JPG
P1020877.JPG
P1020878.JPG
P1020879.JPG
P1020881.JPG
P1020882.JPG
1236610_10151673496131700_756400424_n.jpg
We suggest you mark where every component goes with a sharpie marker on the rear side of the PCB. Once you have the components in place, solder them to the PCB.

We soldered them in the following order:

1. Resistors
2. Capacitors
3. LEDs
4. 555 Timer ICs
5. Cables
6. A50K Potentiometer
7. Switch
8. Speaker
9. 2 Axis potentiometer
10. Battery connector

The crossed cables may be a little confusing but look at the PCB image we took from Fritzing to figure out where each cable goes.