oscillator only 3 components

164

02:59:54

Simple oscillator circuit. Has limited applications but interesting nonetheless. I can not help admire its simplicity.

published 7 years ago

PrathikP

7 years ago

Number one, i can count 4 components apart from the battery. Two, the base of the tranny is floating.

hurz

7 years ago

@PrathikP, built it test it and see what it does for you. Dont forget to change the voltage around 12V +-5V and test with different transistors, not all transistors work.

niko_20010

7 years ago

good example of a "reverse avalanche oscillator"

niko_20010

7 years ago

The circuit works by running the tranny in its reverse breakdown region, which behaves as a so-called negistor...

niko_20010

7 years ago

that means an increase in voltage will cause a DECREASE in current and vice versa

BIPfx

7 years ago

@prathikp the resistor at the output is just there to represent the load, its not actually needed in this circuit so its only 3 components. A battery isnt considered a component its to supply power. Also the base needs to be floating to work.

kiani

6 years ago

The 1k resistor should be an inductor..

BIPfx

6 years ago

@kiani the 1k resistor helps set the rate of oscillation by limiting the current charging the capacitor. An inductor would form a tank circuit with the capacitor if you sub the resistor for a inductor. and while tank circuits are uses in many types of oscillators, this isnt one of them.

niko_20010

6 years ago

you CAN actually build a LC tank negistor oscillator

niko_20010

6 years ago

These are even crystal-controllable ;)

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.