High Voltage Power Supply for Nixie Clocks

High Voltage Power Supply for Nixie Clocks and Nixie Projects.

If you are an electronic nerd you might be interested to understand a working principle for High Voltage Power Supply for the Nixie Clocks. An inductor is used to create high voltage kickback. This configuration is often used in boost converters, called that because the boost voltage. It works because one can not change the current flowing through an inductor spontaneously, inductors resist change in current. This means when the MOSFET transistor turns on and passes a current through the inductor, the current flowing though it will steadily rise, "charging" it. It will eventually reach saturation where the magnetic flux can no longer increase and the inductor acts like a short. There is a point where you can no longer pull it tighter (otherwise it will break). Once this point is reached (or often just before it), the transistor turns off, and the inductor is allowed to "snap" back.

However, in the real world, there is stray capacitance within the inductor as well as outside it, especially if a capacitor is connected. This creates a tank circuit, so the output will actually "ring," it is the equivalent to a bell, tuning fork, spring on a string instrument like guitar. This can be seen on an oscilloscope with the probes connected across the inductor. You will see the ringing and even the initial voltage spike, known as a "transient voltage spike." The diode simply rectifiers this spike and transient so the voltage is DC, although quite a dirty one. (The voltage is all over the place as the inductor oscillates) the capacitor smoothes this out, offering a clean DC high voltage to the nixie tube.

Nixie Dream company

Nixie Dream was founded in 2014 as a small family owned business of three engineers being passioned about retro nixie technology. We have combined retro nixie technology with pure wood nature and built the nixie clock which is truly unique. Our aim is to provide not only quality nixie clocks, but ones that will make a lasting impression. Our business is located in the heart of Ukraine - in Kiev. Feel free to contact us at any time.