Tentaku Mechanical Calculator Case

prusaprinters

<h3>Tentaku Mechanical Calculator Case</h3><figure class="image"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/09915e58-b192-459b-bedd-23c32a430a86/tentaku-mechanical-calculator-case.jpg#%7B%22uuid%22%3A%220d1d67f4-c80e-41c7-92a0-5fae40e37c46%22%2C%22w%22%3A3327%2C%22h%22%3A2496%7D"></figure><p>&nbsp;</p><h4>Background:</h4><figure class="image image-style-align-center image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/bf047594-40c8-43bf-bdc2-4ccbe9de13fc/78d6f46f-f16c-4465-a79f-e8d98c74caa8_base_resized_1000x.jpg#%7B%22uuid%22%3A%224e9253b6-d8ef-4696-806c-3f59dbf1799c%22%2C%22w%22%3A1000%2C%22h%22%3A837%7D"></figure><p>I had a lot of fun building my <a href="https://www.switchkeys.com.au/products/tentaku-mechanical-calculator">Tentaku DIY Mechanical Calculator kit</a>, but the included case was a somewhat flimsy acrylic sheet.&nbsp;</p><figure class="image image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/2e798e5c-4945-4eee-884d-f4e72d86abb8/stockacrylic.png#%7B%22uuid%22%3A%22a794db7d-4ede-4984-abef-fb4cf52d0ffb%22%2C%22w%22%3A575%2C%22h%22%3A817%7D"></figure><p>I wanted something a bit more bulky to protect and hold my calculator. &nbsp;So I remixed @<a href="https://www.prusaprinters.org/social/3814-adafruit">Adafrui</a>t's <a href="https://www.thingiverse.com/thing:4910369">Macropad RP2040</a> case to work with it.</p><figure class="image image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/5f2d1022-097b-4016-9394-801db9a680b3/adifruitsmacropdad.png#%7B%22uuid%22%3A%221c47c8d6-0317-4053-9a70-fcacb48ede61%22%2C%22w%22%3A746%2C%22h%22%3A653%7D"></figure><p>My model uses everything from the<a href="https://www.switchkeys.com.au/products/tentaku-mechanical-calculator"> Tentaku Kit</a> except the back acrylic sheet. &nbsp;You should be able to slide your PCB in and attach the screws on the bottom of the case.</p><figure class="image image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/966c61af-20a5-4fb9-aff6-8fe1ef666564/bottom.png#%7B%22uuid%22%3A%2242d48b59-6f82-4f84-8e6c-34a61c1cf638%22%2C%22w%22%3A481%2C%22h%22%3A762%7D"></figure><p>I will note that the current model is designed so the key caps are a bit recessed.&nbsp;</p><figure class="image image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/e290bd19-7dfd-4ab2-b858-972d700d81bd/sideview.png#%7B%22uuid%22%3A%22e52c5ab0-26df-48f5-8a88-f4d82bd045c2%22%2C%22w%22%3A1028%2C%22h%22%3A677%7D"></figure><p>I've included a second version with a slightly lower brim so they can stick out more like they do on the Adafruit keypad. &nbsp;The normal version is ideal for short flat keycaps. &nbsp;The narrow version is better for slanted caps (like those pictured).</p><figure class="image image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/97426a6a-96c2-4f18-8055-a949783d4583/shorter-version.png#%7B%22uuid%22%3A%2222bd508d-0734-427f-88d8-6ab682216068%22%2C%22w%22%3A1282%2C%22h%22%3A966%7D"></figure><p>It was difficult to leave the AAA battery accessible. &nbsp;This was part of the reason the PCB sits so low. &nbsp;I have pretty big hands, but can still change the batter from the slot on the top.</p><figure class="image image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/f23beb2f-62e0-4933-9976-08ad725a4a7e/topview.png#%7B%22uuid%22%3A%222f9c8054-c26b-4f9c-be82-3bba2b092eae%22%2C%22w%22%3A643%2C%22h%22%3A861%7D"></figure><p>I left a similar cut out to access the switch on the side. &nbsp;You will need to insert the PCB at an angle, since the stock switch sticks out a bit.&nbsp;</p><figure class="image image_resized" style="width:75%;"><img src="https://media.prusaprinters.org/media/prints/108646/rich_content/6b7bc09e-482c-4e0a-b344-7bc496b881d4/switch.png#%7B%22uuid%22%3A%22b54eaaf7-d9a3-4c48-81b0-af513d5d5616%22%2C%22w%22%3A780%2C%22h%22%3A859%7D"></figure><h4>Print Settings:</h4><p><strong>Supports:</strong> Yes, Everywhere&nbsp;</p><p><strong>Material:</strong> I used PETG, but almost any filament would work.</p><p><strong>Infill:</strong> 20% (add more if you want it to have more heft)</p><p><strong>Resolution: </strong>.20</p>