<p>As I only used 1 GND pin for both LEDs, I will use another one for this component (I could weld it to the LEDs' GNDs' but I prefer moving baby steps as this is all new to me).</p>
<p>The main part in the electronic components is the microcontroller, in my case I will use a ESP32 Wroom.</p>
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<p>Why ?</p>
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<p>To hold the ESP32 in place and get enough space under it for the wires that will be attached to it I added a PLA 3D printed bracket (file was found on Thingiverse, thanks to...).</p>
<p>The servo motor has 3 pins to attach to the microcontroller. Therefor I've cut a small hole in both the cat head tower front plate and the back plate of the bowl compartment.</p>
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<h3>Force resistor</h3>
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<p>Final component to add to the feeder is the Thin Flexible Force Sensitive Resistor that can measure weights going from 20g to 2kg.</p>
<p>My project is an automatic cat food dispenser. The cat's food bowl is placed in a compartment protected by a lid. This compartment is attached via a power cable to a tower in the shape of a cat's head, which contains most of the electronics needed to operate the dispenser.</p>
<p>The basic shapes for the tower and food compartment prototypes were created from existing templates on a <strong>laser-cut</strong> box generator website, <strong><ahref="https://boxes.hackerspace-bamberg.de/"target="_blank">Festi</a></strong>. I modified these boxes according to the sizes and specifications I needed for my project by using <strong><ahref="https://inkscape.org/"target="_blank">Inkscape</a></strong> and the laser cutter program, <strong>Gravostyle</strong>.</p>
<p>I also used <strong><ahref="https://www.tinkercad.com"target="_blank">Tinkercad</a></strong> to design the <strong>3D prints</strong> of the ears at the top of the tower, in which the LEDs will be housed.</p>
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<p>Many of the parts holding the <strong>electronic components</strong> were 3D printed from opensource files found on websites like <strong><ahref="https://www.thingiverse.com/"target="_blank">Thingiverse</a></strong>.</p>