Comment by jhallenworld

3 months ago

Easy negative resistance oscillator: a neon bulb in parallel with a capacitor connected to a DC power supply through a resistor.

3 comments

jhallenworld

zhrvoj 3 months ago

I built many such oscillators same way. But I used BC107 NPN, connected collector to the ground, emmiter to resistor/capacitornet. Base free. Add LED in series with such connected transistor, and you have LED blinker.

IAmBroom 3 months ago

"Negative resistance"? Are you sure that's what you mean? Cuz it isn't.

jhallenworld 3 months ago

Yes, it is... (negative differential resistance to be more precise)
https://en.wikipedia.org/wiki/Pearson%E2%80%93Anson_effect
https://en.wikipedia.org/wiki/Negative_resistance