Electronics > Projects, Designs, and Technical Stuff
my own original oscillator
joeqsmith:
--- Quote from: krayvonk on July 07, 2019, 02:20:56 am ---How does it show it doesnt oscillate. Theres just another way to look at the circuit than the way I was when I designed it.
Heres the issue at hand.
--- End quote ---
Based on your original drawing, if you followed along, there is no feedback, only two LEDs in parallel. Both LEDs will behave the same. So there is something wrong.
I'm sorry but I do not understand your last drawings or explanation. Take some clear pictures of your setup and we can start there.
A few people were trying to make some simple oscillators a while back. G0HZU posted one that was pretty interesting. I took a crack at it as well.
https://www.eevblog.com/forum/projects/el-cheapo-oscillator/
krayvonk:
Warning its got my cringey voice in it, but here it actually doesnt osc at first here and you can hear the buzzer by itself.
https://www.youtube.com/watch?v=YHiS8HLVkFs.
When the top row goes off, the bottom row discharges, when the bottom row goes off, the top row discharges... if you make it discharge quicker than it charges, then you get this action happening.
I know its funny when you take it from a steady state, how does 1 side rule over the other, but its equally true that it oscillates in this fashion as just stands still.
joeqsmith:
Sorry, I can't tell anything further from that video. Is there a reason you are reluctant to show a decent picture of it or to draw a complete schematic?
krayvonk:
|O
ah dont worry about it. I shouldnt be letting my tech get stolen anyway.
Your better off with transistors anyway, who cares.
Didnt even try it...
ArthurDent:
--- Quote --- "Hey ArthurDent, what is the mystery component. Im not experienced enough to know yet."
--- End quote ---
The mystery component is indeed a tunnel diode which doesn't behave like a normal diode or other 2-terminal device. Having a negative resistance region allows it to oscillate without feedback. I had a high end scope years a number of years ago that used a tunnel diode in the trigger circuit. Here's a link to a video that will explain its operation.
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