Teaching Myself CAD

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ONSHAPE 3D PRINTING UV PRINTING NFC PIXEL ART

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About

My first builds while teaching myself CAD in Onshape. Each one hides a passive NFC tag, so visitors can tap it with a phone to join the Wi-Fi. I designed the shapes, 3D printed them, and used a UV printer to put artwork straight onto the printed faces.

Wi-Fi NFC prism

It started as a 50 mm square sketched in Onshape, which I turned into a block and sliced into a right-triangular prism 100 mm deep. The slanted front carries my pixel-art Wi-Fi design, UV printed. The slanted face has to sit flat in the UV printer, so I also designed a separate support that holds it level.

The blocks

Building blocks with an NFC tag inside, made as a gift for my dad. I printed a big blue and a big yellow version, then a smaller blue block with "Tap here for Wi-Fi" UV printed on its side.

Writing the tag

I wrote the Wi-Fi details to each NFC sticker with the NFC Tools app. Tapping a phone on the build connects it.

Pumpkin Boo enclosure

My biggest CAD build so far: a printed pumpkin that holds a camera, speaker and two soldered boards. I adapted a YouTuber's Onshape design to fit the electronics and print faster. See Pumpkin Boo.

Build Timeline

21-22 Sept 2026

First Onshape sessions

Sketched the prism and its UV printing support.

24 Sept 2026

Prism printed

Printed the prism and its support at DoES Liverpool.

28 Sept 2026

Blocks planned

Started designing a custom Wi-Fi block as a gift for my dad.

10-11 Oct 2026

Blocks printed

Printed the big blue and yellow blocks and finished the Wi-Fi artwork.

15 Oct 2026

UV printing

UV printed the pixel-art front onto the prism and the Wi-Fi design onto the small blue block.

21 Oct 2026

NFC tags written

Wrote the Wi-Fi details to the NFC stickers, so a phone tap connects.

22 Oct 2026

Part 1 posted

Shared the prism build as the first Teaching Myself CAD video.

Discussion & Feedback

Have questions about this project? Built something similar? Share your thoughts!
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Analysis Terminal

A physical ESP32 game module built for Think to Ink. Entering a player ID on the companion page sends the corresponding team to the terminal, where three physical buttons browse score, rank, games played, wins and league standings on a 2.8-inch colour display. The finished build uses soldered electronics inside a custom black and grey PETG enclosure and was exhibited at Liverpool MakeFest 2026. Project-specific materials cost £18.93.

esp32 c++ arduino +7 more

Pumpkin Boo

A 3D-printed Halloween pumpkin that spots people and boos at them. An ESP32-CAM inside looks out through the open mouth and runs Google's person detection model, and a DFPlayer Mini plays a boo voice generated with ElevenLabs through a small speaker. A status page over Wi-Fi shows what the camera sees, with volume and quiet mode controls. The pumpkin started from a YouTuber's Onshape design, which I adapted to fit the electronics and to print faster.

esp32-cam c++ arduino +6 more

Fabric Colour Sensor

A handheld fabric scanner that uses an illuminated GY-33 TCS34725 sensor to compare two colour samples. An ESP32-S3 averages ten readings per scan, then shows the RGB values and a Match, Similar or Different result on a small OLED. I moved the working prototype onto two soldered perfboards and built a four-part enclosure for Liverpool MakeFest 2026. The electronics worked throughout the event, while the enclosure needed two zip ties to keep its front and rear securely closed.

esp32-s3 c++ arduino +5 more

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