Electronics Design & Production
For these 2 weeks, I wanted to build a sound synthesizer that would work when I completed the circuit with my body. I also wanted to produce a PCB of a custom hand-drawn design.
Prototype with Breadboard
Make a prototyping board:
![](./notionAssets/assets/7a1e2e6e943073ca63bab769f1c23ad90d4638b9819460fc77e3affeb448208f/Untitled.jpeg)
PCB design
Make the schematic. Make own symbol + footprint for BOB-11570:
![](./notionAssets/assets/77d2289c55d65024557210f30ceb6f3d5da11eb1742691a2e2c493daa8992770/Untitled.png)
![](./notionAssets/assets/1a22e42e093bd5c136402a4ea10288360e103abb3e62baa93fd9e6c95971b021/Untitled.png)
![](./notionAssets/assets/1b452b0f1fa5e24cad2416755752518f1afa8cb99869152b5fe1b1b71d4ecb85/Untitled.png)
![](./notionAssets/assets/88ebd79aa6e418d7130d49e3adf37f1aa53fdaf9f32b704c4ead2d07cd643f7a/Untitled.png)
v2: Hand-drawn!
I printed all the footprints on the piece of paper with a regular printer, making sure that all dimensions remained the same. Then I drew parts and connections by hand.
![](./notionAssets/assets/82e4c62a46d3353b34b3e8c051cc05b4932b6cfdcd07a1ba6b7958d15ae02fea/Untitled.png)
I converted JPG to SVG, and overlaid it with the original parts to ensure the right scale.
![](./notionAssets/assets/2a7f8a9234ceda6954e3b2a665b66970f8604476bcca0950f6ad7b5a34df9d94/Untitled.png)
![](./notionAssets/assets/5b328ff22e4b1e3297f39c4b3cffebe127cc796cb05f103219a3ee70b9e77ba4/Untitled.jpeg)
Final results. The interaction works great, I can measure the gradual drop in voltage whenever I touch two fingers of the device. I will try to learn the audio library Mozzi and turn this little PCB into a sound synthesizer in the future!
![](./notionAssets/assets/c436f44fc5c055aa53f22ef87108a87c812608e3a599d5984b5b036dc13c4500/Untitled.jpeg)