One of the devices with the lowest breakdown ionization potentials is the neon
There was one version sold by Radio Shack that broke down at about 50 volts.
With a resistor and a capacitor you could make it pulse. The voltage built up
on the capacitor and the lamp
pulsed discharging the capacitor.
I tried to employ this negative coefficient of resistance to make an amplifier.
The pulsing operation
is actually an oscillator, perhaps it would oscillate at audio frequencies. I
had no luck with this idea.
The bulb glowed dimly. This was not a bright idea! Anyway is fun to play
with and learn about glow discharge arcs. As before, I had none break down at
less than 50 volts.
Today I am making apps. My latest app Video Selfie Start / Stop is now running
a paid advertising complain.
I have had about a quarter of a million impressions issued. Of that at I got
about 500 hits. I sold one app.
Its is really hard to do anything, is it not!