3D Design¶

Precedents and Inspirations¶

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Initial Design¶

Initial Sketch¶

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Initial Parts Modelling¶

There will be 3 parts that I need to model: (1) Liquid container, (2) Connector for electrode, and (3) the ‘brain’ of the technology. I modeled this part during the Week 2: Computer-aided Design Assignment

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Design Development¶

Enclosure Design¶

Built upon my initial idea of wanting to incorporate everyday glass jars that people have in their home, and with modularity system in mind, the device’s enclosure consists of two main parts: the main controller unit body and the probe storage.

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Controller Unit Body¶

The main controller unit body comprises two parts:

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Probe Storage¶

Initially, the plan is to utilize a glass jar or any existing bottle for probe storage. However, due to the long dimensions of the pH sensor probe, finding a suitable size is challenging. For the first prototype, this part will be 3D printed.

Sensors Probe Design¶

I also design and made the probe by myself by laser-cutting it with press-fit joineries.

System Integration¶

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All module parts, including the controller unit cap, body, and probe storage, will be connected using a twist-lock mechanism. The enclosure will be 3D printed with PLA, applying a fuzzy skin texture in the slicer settings to minimize visibility of 3D printing seams on round shapes.

The sensor probe will be designed frugally using a stainless steel rod, integrated into a voltage divider circuit with the MCU input voltage. It will be fabricated using laser-cutting and press-fit joineries.

The overall integration will use a combination of press-fit joinery, twist-lock mechanisms, brackets, and screws for assembly.