Low-pressure Plasma indicators – Smoldering discharge

 Low-pressure Plasma indicators – Smoldering discharge

 Updated January 2023

 You already guess, today we will talk about something stylish, and, at the same time warm and vintage, carrying exactly this warmth every need.

 Neon Lamps Electroluminescent Lamps and plasma displays are using the smoldering discharge or the low-pressure plasma discharge principle.




1. Theory

2. Electronics Indicator Device Usage


1.) Theory:

  The low-pressure plasma discharge principle is widely used in the vacuum tubes, as indicator lamps, and for stabilizing voltage circuits, many years before being developed the Semiconductor Zener Diodes. 

 They Utilize and use the idea of low light irradiation between two electrodes surrounded with special inert gas, when is applied, controlled, highly enough DC Voltage Source. The Emitted Light has a different color, strongly dependent on a used gas. The Common case is using “Argonium”, and emitted light has a pretty warm orange color.

The Simple dot indicator implemented into the wall switch has the same principle, as the next described Indicators.

The Matrix Dot Nixie VFD Indicator Display ITM1A / ITM-1A:


VIDEO 1. Nixie Tube SHIELD for Arduino



2.) Electronics Indicator Device Usage:

  The typical usage of Neon Indicators was in the measurement equipment from the near past. The Alpha-Numeric single Digit Tubes are the main indicator part for building the Alpha-Numeric Display. They are easily readable in a dark and in daylight.

 Updated January 2023



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