
Mechanical Pomodoro Timer
CedricL1u/Chronos
Chronos is a fully mechanical 7‑segment Pomodoro timer and clock that uses cams, servos, and a custom ESP32‑C3 PCB to create a kinetic, alarm‑equipped display that makes focus sessions more engaging.

The SM5819 is a schottky Diode made by DIOTEC in a DO-213AB package with 2 pins. -50℃~+150℃ 1 Independent 1A 1mA@40V 33A 40V 900mV@3A DO-213AB Schottky Diodes ROHS.
PCBKit's library has its KiCad symbol (Device:D_Schottky, from KiCad's library) and its footprint (Diode_SMD:D_MELF, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C3758931). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | K | Passive |
| 2 | A | Passive |

CedricL1u/Chronos
Chronos is a fully mechanical 7‑segment Pomodoro timer and clock that uses cams, servos, and a custom ESP32‑C3 PCB to create a kinetic, alarm‑equipped display that makes focus sessions more engaging.
<iframe src="https://pcbkit.io/embed/parts/diotec/SM5819" title="SM5819 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/diotec/SM5819.jpg" alt="SM5819" width="1200" height="900">[](https://pcbkit.io/parts/diotec/SM5819)Yes. The symbol is Device:D_Schottky and the footprint Diode_SMD:D_MELF, both drawn on this page. PCBKit places them on a board for you when you design with it.
DO-213AB, with 2 pins. Its footprint is drawn on this page.
DIOTEC publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C3758931, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the BYM13-60-E3 by Vishay Intertechnology, the BYM13-40-E3 by Vishay Intertechnology, the SGL41-40-E3 by Vishay Intertechnology and the TMBYV10-60FILM by STMicroelectronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.