Before Thanksgiving break we met to start building the theremin. The first step in creating our theremin was creating the circuit board. This was accomplished by first obtaining a sheet of double sided copper clad board. Next we used the laser printers in kettering labs to print the model of the circuit on photo paper. The reason for this is using laser ink on photo paper allows you to transfer the image onto whatever you want using an iron.
We used an iron to transfer the image onto the copper.[video] This was the most difficult step of the whole project because it is very difficult to get the ink to transfer completely. We were lucky and got about 90% of the circuit to transfer. The rest of the circuit was filled in with sharpie.
Next we cut out the square containing the circuit and submerged it into the etching solution.[video] The etching solution dissolves all of the copper on the board except for where the circuit was ironed on. This step took about 45 mins, and once the process was complete the circuit board looked like this.
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