Nixie-clock-BLE

Project inspired by GreatScott!'s video. The main difference is in the MCU choice, in this project it is used the ESP32 to give the Nixie clock the change of time capabilities with bluetooth.

PCB looks like

Front:

Back:

List of components

The raw list

• 1 x ESP32
• 4 x Nixie clock tube (IN-14 type)
• 4 x Nixie clock driver
• 1 x RTC (In the project it was used the DS 3231 shield)
• 1 x Boost converter (in order to get the 170V required by the nixie tubes)
• 1 x Voltage regulator (In the project it was used an L7805CV)
• 2 x 10uF capacitors (for the 12V and 5V lines)
• 4 x 100nF capacitors (one for each nixie driver)
• 4 x 10K Resistors (one between each nixie clock's anode and 170V) Should be it.

The firmware

The only piece that is required to fill is the NIXIE_CLOCK_SERVICE_UUID definition.

3D printing design files

Inside the folder 3D-case-design there are the AutoDesk Fusion 360 design files used for this project in .stl and .f3d format. Click here for a preview of the case design.

❗ Please notice that the lid is slightly off. We have made only a simple draft and then decided to leave it as it was (see notes below).

Notes

1. In the current project the majority of components are in the same side of the Nixie tubes. This will prevent the use of a top flat cover, unless you decide to put a lot of holes in it. So all the components should be moved on the back side and rearranging the connection in accordance.
2. The nixie clock tubes used for the hour and the one used for the minutes are not symmetrical to the center of the PCB.