HOテル Vertical Lamp (Cyberpunk 2077 Hoteru glowing sign)

A HOテル Lamp powered by a USB-C ESP32 D1 Mini and four 4x4 WS2812B LED Matrices , running WLED for full RGB lighting control and an easy Home-Assistant integration .

This is the vertical version of the lamp. An alternative horizontal version is available here .

Featuring:

- Optional and reversible ESP32 D1 mini case (allows the USB-C connector to face left or right; removable if you prefer to drive the lamp with another controller).

- Easy front and back plate assembly with print-in-place locking tabs and built-in supports .

- Light-blocking walls on the front plate , enabling per-letter illumination with minimal light bleed.

Bill of Materials

The lamp was designed to fit the following components:

- USB-C ESP32 D1 Mini

- 30x30 mm , 4x4 WS2812B LED Matrix (4 total, one per letter)

You will also need:

- Wires: 5 cm x 15

- Optional: a small 3-pins connector ( JST-XH 2.5 mm crimped connectors work well) to make assembly and disassembly easier.

Printing recommandations

- The H , O , テ and ル light diffusers should be printed on a smooth build plate (smooth PEI or similar) using a light-diffusing color (e.g., white PLA). Using a textured plate will change the appearance of the letters, which might be desirable depending on the style you want.

- Do not enable slicer-generated supports , especially on the backplate, as they may interfere with the built-in model supports.

Instructions

1. Electronics

1.1. ESP32

Solder three 5 cm wires to the ESP32 on the following headers:

- GND

- 5V

- IO16 ( as recommended by the WLED documentation )

Then crimp or solder the wires to the JST-XH connector.

Finally, follow the official WLED documentation to install WLED on your ESP32:

- WLED installer site (recommanded method)

- WLED documentation

If your ESP32 is not recognized (no COM port), you may need to install the CP210x USB to UART driver .

1.2. LED matrices

Solder the 4 LED Matrices in serie, using ~5 cm wires as follows:

- GND → GND

- 5V/VCC → 5V/VCC

- OUT → IN

On the first matrix (the one with the unsoldered IN pad), solder the three 5 cm wires to:

- GND

- 5V/VCC

- IN

Then crimp or solder the wires to the JST-XH connector, making sure to follow the pin order below so that, once both connectors are plugged together, the wiring matches properly:

- ESP32 GND → Matrix GND

- ESP32 5V → Matrix 5V/VCC