Even with a wide range of modern indicator options, there’s still something really cool about how Nixie tubes glow to indicate a selected character. While generally not produced anymore, a large stock of new-old tubes means that they’re entirely usable today, with the caveat that they have to be DC powered in the 100 volt range. This requirement is a hassle for modern electronics, and also presents some potential danger.
While it won’t eliminate this danger, and need for experience/caution when working with such tubes, the Digitally Adjustable Nixie Tube Power Supply from WiZeus Store takes care of actually generating the needed DC power. From a 12VDC input, it’s able to generate voltages of between 85 to 175V, with a 20mA max current. This voltage range can be controlled by an Arduino board or other controllers via I2C, allowing for dynamic effects, such as dimming the tubes at night.
The device can also supply 5V or 3.3V for control electronics. Nixie power can be switched off when needed, while keeping the lower voltage power active, as an all-in-one power supply.