Unijunction Transistor, Modulates an AC waveform

[PrescottDan]

How does a Uni-Junction transistor creates a charging/discharging effect and outputs a AC waveform or bi polar waveform to cause a light to blink?

A Uni-Junction Transistor has negative resistance, what is a negative resistance? and how does this work?

The Uni-Junction transistors Emitter needs a charging path and an discharging path that goes to the Emitter?

A Uni-Junction Transistor acts like a damaged transistor to me, it breaks down when the voltage on the emitter is low trigger threshold and expands when the voltage on the emitter is at a trigger threshold. This creates a bi polar ramping waveform or an oscillation?

The Emitter of a UniJunction Transistor has 2 trigger thresholds, for a low voltage threshold and the other for a high voltage threshold?

 

[Venkadesh_M]

How does a Uni-Junction transistor creates a charging/discharging effect and outputs a AC waveform or bi polar waveform to cause a light to blink?

Its not a bipolar waveform, but the blinking effect is due to . . .. You and me understand the circuit but everybody should because you are posting in a forum, so start with the UJT sawtooth generator circuit diagram.

A Uni-Junction Transistor has negative resistance, what is a negative resistance? and how does this work?

Negative resistance means reduction in Base1 to Base2 resistance due to Emitter voltage.

The Uni-Junction transistors Emitter needs a charging path and an discharging path that goes to the Emitter?

The charging path will complete without emitter, but discharge will be through Emitter.

A Uni-Junction Transistor acts like a damaged transistor to me, it breaks down when the voltage on the emitter is low trigger threshold and expands when the voltage on the emitter is at a trigger threshold. This creates a bi polar ramping waveform or an oscillation?

Yeah, That way.

The Emitter of a UniJunction Transistor has 2 trigger thresholds, for a low voltage threshold and the other for a high voltage threshold?

High thresold is Voltage and low thresold is current.

 

[PrescottDan]

Negative resistance means reduction in Base1 to Base2 resistance due to Emitter voltage.

So when there is a Voltage on the Emitter , base1 to Base2 have a negative resistance?

Does Negative resistance mean low impedance or like a low ohm resistor?

The charging path will complete without emitter, but discharge will be through Emitter.

So the Charging path doesn't PASS through the emitter to base1 or Base2?

Only the Discharging Path Passing through the emitter to base2?

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so start with the UJT sawtooth generator circuit diagram.

I'm not sure how a UJT creates a sawtooth waveform? from emitter to base#2? or from Base#1 to Base#2

How does it create a sawtooth waveform , it's the emitter and base , negative resistance?

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It's the Negative resistance expanding and collapsing from the emitter to base#2?