myTimer

prusaprinters

<p>myTimer is a timer counting two (Red and Green) individually adjustable time periods on 16 LED ring.&nbsp;</p><p>I have wished to design a <strong>Pomodoro Timer</strong> for long time already. I get inspired by my friend <i>Josef N</i>. As <a href="https://en.wikipedia.org/wiki/Pomodoro_Technique">wiki</a> describes the Pomodoro Technique is a time management method uses a timer to break down work into intervals,<strong> traditionally 25 minutes in length, separated by 5 minutes breaks</strong>. This technique helps you to maintain your productivity during the whole day.</p><p>Based on input from my friend <i>Joe L.,</i> I decided to add a time interval adjustment feature. After myTimer power-up the time intervals are set to follow pomodoro technique. &nbsp;Red = 25 minutes, Green = 5 minutes. With long button press and potentiometer rotation, user can set time in range 2 minutes to 32 minutes. Every LED represents 2 minutes. Thanks to this feature myTimer can be used in more use-cases (i.e. <strong>sauna ritual, workout, games,…</strong>). Short press of the button switch immediately from Red to Green and vice versa.</p><figure class="media"><oembed url="https://youtu.be/akWo-fWBnAA"></oembed></figure><p><strong>Bill Of Materials:</strong></p><ul><li><a href="https://www.adafruit.com/product/1501">Adafruit Trinket - Mini Microcontroller - 5V</a></li><li><a href="https://www.adafruit.com/product/1463">NeoPixel Ring - 16 x 5050 RGB LED</a></li><li><a href="https://uk.rs-online.com/web/p/tactile-switches/7582041/?sra=pmpn">Tactile Switch</a></li><li><a href="https://uk.rs-online.com/web/p/potentiometers/1548166">Rotary Potentiometer</a></li><li><a href="https://se.rs-online.com/web/p/machine-screws/1795697">M2 x 4 mm screws</a></li></ul><p><strong>Print Instructions:</strong></p><p>myTimer comprises 5 3D printed parts. I printed back and white PLA with layer height 0.2 mm. I recommend to print LED_diffuser and LED_lid in white for the best illumination effect. Only one small support recommended see sliced models.&nbsp;</p><p><strong>Assembly Instructions:</strong></p><p>Due to low base height and limited space, wiring might be challenging. I recommend to keep wire colour code as in schematic. I shot a video of my assembly for your inspiration. Since the printed parts are PLA any supper glue is ok for your assembly.&nbsp;</p><figure class="media"><oembed url="https://youtu.be/eVz5a-S5FaE"></oembed></figure><p><strong>Source Code and FW download:</strong></p><p>Adafruit Trinket 5V is used as a microcontroller of myTimer. I recommend to read through the complete guided tour at <a href="https://learn.adafruit.com/introducing-trinket/introduction">learn.adafruit</a> to understand the limitations. However, it is important to follow at least <a href="https://learn.adafruit.com/introducing-trinket/windows-setup">Win and Arduino IDE setup</a> guide. The myTimer source code is <a href="https://github.com/naKoleniNaGitu/myTimer">here</a>.</p><p><strong>Power supply:</strong></p><p>Please note it is not recommended to power it up from PC/laptop USB port. Prefer USB charger or power bank. Button's input pin is shared with USB data line. It can cause unintended button press events…</p>