Here is the bottom end of the first prototype showing how it operates. The adjustment Pot is the small hole on the right side of the end cap. The display is activated in both modes with the main push button.
The switch in the Down position shows the voltage at the atomizer.

The switch in the Up position shows the output voltage of the batteries only, it is also the safety position as only the LED is active.

There is a center position of the switch that will turn them both off, but there is no 'indent' in the switch to let you know it is centered.
The switch in the Down position shows the voltage at the atomizer.

The switch in the Up position shows the output voltage of the batteries only, it is also the safety position as only the LED is active.

There is a center position of the switch that will turn them both off, but there is no 'indent' in the switch to let you know it is centered.

