Next to the power channels, we have the fan headers, also colored in black:
To the main PCB we can also see a small daughterboard, which takes care of the antenna reception; the antenna must be placed carefully for maximum signal with the remote:
The 4 Nixie tubes present on this fan controller are used for displaying digits from 0 to 9; the glass tubes contain a wire-mesh anode and multiple cathodes, shaped as numerals. When we apply power to one cathode, it gets surrounded with an orange glow discharge. The tubes are filled with gas at low pressure, in a Penning mixture:
Here is a closer look on the tubes:
On the top right corner, we get three additional LED lights, each representing the display mode we are in (degrees, voltages, RPM); also, each Nixie tube has an additional LED underneath to represent the channel we are currently controlling:
On the sides of the controller, we can find the fixing orifices:
The LAMPTRON remote is really easy to use and features Open/Close buttons for turning on or off the Nixie display, a M button for switching between the modes, arrows left/right for switching between channels and +/- signs for modifying the values:
On the back side of the remote we have the battery compartment:
Lifting the battery cover reveals a 3V CR2025 battery: