Glow in the Dark Robotic Clock

prusaprinters

<p>I spent a lot of time creating the YouTube video so watch it too for assembly and how it works!</p><figure class="media"><oembed url="https://www.youtube.com/watch?v=WlYbBn4rgSI"></oembed></figure><p>This is my clock design I made for the Prusa clocks contest. My idea is to robotically control a light to draw the current time on a glow in the dark screen.&nbsp;</p><p>This project involved 3D printing, circuit board design, and microcontroller programming. I'm happy with how it turned out and had a lot of fun making it and I hope you enjoy watching the video!&nbsp;</p><p><strong>Materials</strong></p><p>Note: Read and follow all safety instructions and wear proper PPE.</p><p>1 7805 5V regulator</p><p>1 ATtiny85 microcontroller</p><p>2 LS-0006 servo (or similar type and dimensions)</p><p>1 Mini 3 pin switch</p><p>1 Blue LED</p><p>1 9V battery and connector</p><p>1 3 Pin jumper wire</p><p>1 Glow in The Dark Sticker A5 Paper 5pcs (Amazon)</p><p>1 Overhead Projector Sheets (Amazon)</p><p>3D Printed file attached. (0.2mm layer height. 20% infill. No supports)</p><p><strong>PCB</strong></p><p>These parts aren't going to move on their own, so we need to create the circuit board. I like to use a CNC machine to drill out the holes, carve out the traces, and cut out the board. Load the program onto the microcontroller and solder the components.&nbsp;</p><figure class="image image_resized" style="width:29.98%;"><img src="https://media.prusaprinters.org/media/prints/68660/rich_content/93a2bf01-e74a-49ea-8b3c-83c121f5cf39/q10.png#%7B%22uuid%22%3A%22e2db3150-b1fd-4f3a-866d-dd507b159c0f%22%2C%22w%22%3A1080%2C%22h%22%3A1080%7D"></figure><p><strong>3D Pint and assemble</strong></p><p>Solder the led to the wires and insert them into the 3D printed holder. Wrap the tip in dark electrical tape to prevent the light from leaking through.</p><p>The servo arm's need to be rigid so superglue the arm into position on the 3D print.</p><p>We need to know where the center position is on the servos so I programmed the servos to go to the middle 90 degrees at the startup so mark this with a sharpie and attached the 3D printed parts.</p><p>The loose wires can be inserted into the loops on the left side if needed.</p><figure class="image image_resized" style="width:37.07%;"><img src="https://media.prusaprinters.org/media/prints/68660/rich_content/5a9edc9c-0478-4f10-8a1d-7f71357d35c1/16.jpg#%7B%22uuid%22%3A%222031b8ba-69a2-4c7f-9cfe-d6f591bfe898%22%2C%22w%22%3A1080%2C%22h%22%3A1080%7D"></figure><p><strong>Glow in the Dark Paper</strong></p><p>The screen that the light will project onto is this glow in the dark sheet is like a big sticker and very sticky so I carefully stuck it onto the clear plastic sheet and cut it out. Dimensions: 150mm x 75mm.</p><figure class="image image_resized" style="width:37.91%;"><img src="https://media.prusaprinters.org/media/prints/68660/rich_content/58079127-b94b-450d-9fd3-53abec188529/15.jpg#%7B%22uuid%22%3A%22fbb7af11-c617-4b18-9894-790df0f7320a%22%2C%22w%22%3A1028%2C%22h%22%3A1028%7D"></figure><p><strong>Finish!</strong></p><p>The build is complete and you can load the the code I attached and watch the light draw out the time. It's mesmerizing to watch and I am very happy this all came together and works! Thank you so much for watching the video and follow me at YouTube - 3DSage for more fun projects!</p><p>www.youtube.com/c/3dsage</p><figure class="image image_resized" style="width:45.6%;"><img src="https://media.prusaprinters.org/media/prints/68660/rich_content/cd794063-56c0-40a1-a6d0-9089532bc707/cover_square.jpg#%7B%22uuid%22%3A%22017a7748-0069-4ff8-9659-d309ef49aa87%22%2C%22w%22%3A1080%2C%22h%22%3A1080%7D"></figure>