Simplest oscillator and too low power burns

I did many different, but then noyised that when i pull the socket out from wall, there is defferent sound than when its normal on. So i put 5 one oscillators with 18v power and wired to old sewing machines foot pedal to powered.
Now it works fine first time, but then nothing. Tested it 4 times and every time something brokes after first Try and no sound. Its here : https://youtu.be/64U1eqNlA9Y
Nad herrs more ideas to do : https://youtu.be/b0eDLi_w_bA
:slight_smile:
https://youtu.be/9tTiM9ONM0A
So is there some part that is very easy to broke at low power? Thanks.

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here is defferent sound than when its normal on

sounds like it is powering down so a different sound should expected as the transistor stops too oscillate with the voltage dropping.

So i put 5 one oscillators with 18v power and wired to old sewing machines foot pedal to powered.

Maybe try too measure the resistance of the foot pedal switch Sometimes AC Based switches have a Resistance for the higher voltage. (That should explain the Different sound when using the pedal.

Do you have the Pedal switching the DC powersupply on and off on the AC side or are you using it as a switch on the DC side? This might be effecting it.

Now it works fine first time, but then nothing. Tested it 4 times and every time something brokes after first

The Reverse avalanche oscillator is basically Abusing the transistor in its theory. So reliability Might be hit or miss depends. here is a write up on its theory

Power starving circuits can get interesting results. Me power starving my amp as it powers down. But it puts a lot of stress on circuits if it is done a lot.

If anyone knows where the newer LMNC schematic is for the mega drone oscillator. I would love too see the new schematic for it and see what he has changed.

On another note what is that joystick controller you have? Looks pretty cool is it wired directly with the drones pots?

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Well, id must change the broken parts and try to put something to prevent the broking from happening in the first place… Cause i want it to be working with the foot pedal idea, otherwice its only normal 5 simple oscillators in an odd hausing…
My english is so bad that looked like im wondering why this is all happening, while i want that all to be happend (exept the broking).
The joystick pots is from some game machine that i took apart and used the cover to some else project… So they are exactly 10k pots! There are 4 simple oscillators inside, exept one of those are broke, or the pot is broke, i remember that i had one gamepad that has issues with the joystick pot… Maybe its just that one.

Heres answer done with google translator;

Thanks for the answer. So I want it to work the way it works, meaning the foot pedal can vary the supply voltage of the entire five oscillators. The pots adjust the pre-sounds manually and the pedal makes more special sound. If you do not know how to use this is a gaming machine sometimes sewn, then not then, but I guess you could!
Of course, I could connect the whole package through some control, which I might do if the original pedal doesn’t work. I have to open the pedal and examine, it doesn’t count volts like a couple of volts, then I don’t know about the current …
The 240v ac goes into the pedal to lower it to 238v ac and from it it goes to a transformer / power supply with an output of 18v dc, this connected to a single transistor oscillator as it should.

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