The directory `case` contains the [OpenSCAD](https://en.wikibooks.org/wiki/OpenSCAD_User_Manual) project and rendered [STL file](case/clock.stl) of the clock's enclosure for 3D printing.
The enclosure is designed to be 3D-printed, and fits an 60x WS2812 LEDs strip with 144 LEDs per meter, such as [this one (AliExpress link)](https://de.aliexpress.com/item/32682015405.html)
The enclosure also contains mounting holes to which a front plate can be attached (such as in the photo above).
To create your own clockface with a laser cutter, use the file [clockface.svg](case/clockface.svg) for cutting, and add your own digits and other decoration as an engraving layer.
The WS2812 data line needs to be connected to the ESP's GPIO5 pin. **Note**: Most breakout boards define their own pin numbers. For example, with a NodeMCU, GPIO5 corresponds to pin D1.
You can attach a voltage divider with a photo resistor as pull-down and a regular resistor as pull-up to the ESP's8266 ADC.
If you choose to do this, please check the ADC voltage level of your ESP8266 board: While the ADC itself works in the range 0.0V...1.0V, a lot of breakout boards scale that up to 0.0V...3.3V.
You can use the values `ADC_MAX`, `ADC_MIN`, `BRIGHT_MIN` and `BRIGHT_MAX` at the top of the file `esp/src/main.cpp` to fine-tune the sensitivity and thresholds of the auto adjustment.
If you do not use this feature, and observe some flickering, please short the ADC to GND.
