Wien Bridge Oscillator

102

00:59:32

If someone could tune this properly...it is sensitive. Oscillation starts, if you shake or press te button. A few Hz 'til ~900 MHz or more are possible.

published 10 years ago

thebugger

10 years ago

Sorry but a bulb stabilisation doesn't work in EC. The bulb doesn't have the positive thermal coefficient required to regulate the amplitude.

Lumixeu

10 years ago

If thermal resistance of a Bulb changes with Voltage/Current, wouldn't it be possible to simulate a bulb as voltage dependent Current source? I mean, as approximation. Could we try to build a bulb model for fun?

Lumixeu

10 years ago

I propose “A Spice compatible Behavioral Electrical Model of a Heated Tungsten Filament“ by Sam Ben-Yaakov & Mor Mordechai Peretz @ Power Electronics Lab Department of Electrical and Computer Engineering @ Ben-Gurion Univ. of the Negev.

Lumixeu

10 years ago

EC is not capable of it...i'll try anyway.

hurz

10 years ago

It is possible for sure! You can emulate a bulb with EC, why not?

thebugger

10 years ago

I've made an example of emulating a bulb. It's called differently. An automatic gain control system or AGC.

Lumixeu

10 years ago

@ thebugger thx, i saw it. I would prefer building the digital part with logical coils. Then it would be cranked up even more. Nasty Science.

thebugger

10 years ago

Why would you use a coil in an analog circuit such as this. This doesn't have a digital counterpart. Ah and it's more simple to use logic gates, than the coil hysteresis for logic operations.

Lumixeu

10 years ago

@thebugger oh bugger, if you knew how i'm into discrete even discrete logic with ferrite coils. Because it's incredibly hard stupid and retro, i believe it could be done with carrots and sheepgoo. But you are right. Logic gates work for us ..i also love to work them as Schmitt triggered discrete devices. Like class A teapot heater which purpose is its weakness.

Lumixeu

10 years ago

The multiplication of weaknesses, e.g. LF-quality over dissipation in Cl.-A Amps, dissipation has to get an attribute then. Which is warmth, even in my cup ifnot in our hearts.

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