(almost) solderless, reusable micro:bit timer

prusaprinters

<p>Micro:bit boards are brilliant little platforms.</p> <p>I needed a fun replacement for a three minutes hourglass timer and imagined a device working with what I had at hand.</p> <p>Since I wanted to be able to reuse my Micro:bit board for other purposes, soldering wires to connect things like a button, a switch and a battery was a no-go. Until I came with an idea: building some kind of craddle to connect to the Micro:bit ports without soldering them.</p> <p>And that's the nice part of my design: the Micro:bit connects to whatever component you want without any direct soldering.<br/> I solder brass fasteners to the components. And brads connect to the Micro:bit, just touching the ports.<br/> That way you just slide the Micro:bit board in the holder to make it connect to the components. And you can remove it and reuse it for other projects as you want.</p> <p>My project is a 3 minutes timer. Three minutes is the default time. Shake it and it's a two minutes timer. Shake it again and it's a one minute timer!</p> <p>A demo and step-by-step building instructions is available here: <a href="https://youtu.be/lHQFzX9xagM">https://youtu.be/lHQFzX9xagM</a></p> <p>The brads system can be used for any other project without having to sacrifice a Micro:bit board.</p> <p>This project only uses the 3V, Ground and #0 ports but the Connector and Micro:bit-Holder parts can be used to connect any other available ports.</p> <p>Parts list:</p> <ul> <li>PLA</li> <li>one BBC micro:bit™ v2 board (I use v2 because it can play sound without any external speaker)</li> <li>short brads (brass fasteners)</li> <li>one arcade-style push button</li> <li>one switch button</li> <li>one coin-battery holder</li> <li>one CR2032 3V coin battery</li> <li><p>wires and solder Some references on <a href="Amazon.fr">Amazon</a>:</p> <p><a href="https://www.amazon.fr/gp/product/B08QW82B4F?tag=thingiverse09-20">Micro:bit board</a><br/> <a href="https://www.amazon.fr/gp/product/B0823WK4CN?tag=thingiverse09-20">Coin battery holder</a><br/> <a href="https://www.amazon.fr/gp/product/B08748CKF4?tag=thingiverse09-20">Brads</a><br/> <a href="https://www.amazon.fr/gp/product/B0819ZZRKC?tag=thingiverse09-20">Arcade push button</a><br/> <a href="https://www.amazon.fr/gp/product/B08HH21DL2?tag=thingiverse09-20">Switch button</a></p> <p>My code for the Timer can be found on <a href="https://adamow6.github.io/timer/">GitHub</a>.</p> <h3>Print Settings</h3> </li> </ul> <p><strong>Printer Brand:</strong></p> <p>Prusa</p> <p><p class="detail-setting printer"><strong>Printer: </strong> <div><p>I3 MK3S</p></div><strong>Rafts:</strong></p> <p>No</p> <p><p class="detail-setting supports"><strong>Supports: </strong> <div><p>No</p></div><strong>Resolution:</strong></p> <p>200</p> <p><p class="detail-setting infill"><strong>Infill: </strong> <div><p>20</p></div><br/> <strong>Filament:</strong><br/> Prusament PLA Galaxy black</p> </p></p></p> Category: Electronics