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Build the Solar Theremin kit 

Make] Projects 

hhiiilH ho/ 1 !/ tuMaal/ chare r\icf*f\\tat* 

build, hack, tweak, share, discover,- 

Build the Solar Theremin kit 

Written By: Marc de Vinck 


Craft knifed) 

Rosin-core solder (1) 

Scissors (1) 

Soldering iron (1) 

Third-hand tool (1) 
aka helping hand 


Solar-Powered Theremin (Heliophone) 

Make project tin (1) 


This is a really fun project for anyone interested in electronics or music. Best of all, it's 
inexpensive, easy to solder, and lots of fun. 

You can pick up a kit in the Maker Shed . 

Make sure to watch my video demo and take a guess at what song I'm playing! 

© Make Projects 

Page 1 of 7 

Build the Solar Theremin kit 

Step 1 — Build the Solar Theremin kit 

# Check your kit against the parts list 

• Remember to get a mint tin to 
house the electronics, or pick up a 
Make Projects tin . 

Step 2 





• The first step is to cut out the 
templates provided in the 
directions. I used the piece of 
cardboard that the solar panel was 
attached to for the Theremin's top. 

© Make Projects 

Page 2 of 7 

Build the Solar Theremin kit 

Step 3 

• Tape the bottom template in the tin. 
This will stop any of the electrical 
components from shorting out if 
they happen to touch the tin. 

• Add the long cardboard strip 
around the interior edge of the tin. 

Step 4 

• Solder the 3 transistors and the 
22K resistor. 

• Make sure you insert the 
transistors according to the 
diagram or it will not work. 

© Make Projects 

Page 3 of 7 

Build the Solar Theremin kit 

Step 5 

• You need to connect the (2) 
supplied capacitors together prior 
to soldering them. 

• Make sure you connect them with 
the (+) and (-) ends together. The 
arrows on the capacitors, which 
happen to point to the negative 
lead, should be pointing from right 
to left when looking at the board. 

Step 6 

• Solder the capacitors to the board. 

• Don't clip the leads yet! You can 
cut the (+) lead, but the (-) lead 
will be soldered to the switch. 

© Make Projects 

Page 4 of 7 

Build the Solar Theremin kit 

Step 7 

• Attach the pre-tinned copper wires 
to the board. 

• You can see them at the top of 
this picture. 

• I used the 3rd hand to hold them 
in place while soldering. 

• The (2) 3cm wires go in the middle 
of the (2) 7cm wires. 

Step 8 

• Solder the switch to the (-) side of 
the board and the twisted pair of 
wires from the capacitors. 

© Make Projects 

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Build the Solar Theremin 


Step 9 

• Add the 12k resistor to the back of 
the board. 

• Make sure to read the included 
directions carefully and solder it 
in the right spot. 

• One end goes to the (+) side of 
the capacitors and the other 
goes to a trace on the board. 

Step 10 

• It can be a bit tricky to solder the 
speaker. I found using the 3rd hand 
to hold the speaker in place and 
bending the (2) 3cm wires was the 
easiest way to solder them 

© Make Projects 

Page 6 of 7 

Build the Solar Theremin kit 

Step 11 

• Screw the switch into the 
cardboard template that you cut 

• Next, feed the (2) 7cm leads 
through the holes in the template. 

• Now solder the solar panel to the 
copper tinned leads. 

• Make sure you orient the solar 
panel as described in the 

• The panel can be tricky to solder; 
make sure you use enough heat. 

Step 12 

• Push the whole assembly 
underneath the lip of the tin. 

• The cardboard ring will hold it away 
from the bottom. 

• You might want to use a small 
screwdriver to slip the cardboard 
under the lip. It can be a bit 
tricky, but the template is a 
perfect fit. 

• That's it! Take it outside and make 
some music. 

• Make sure to watch my video demo 

This document was last generated on 201 2-1 0-31 11 :57:25 PM. 

© Make Projects 

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