Simplest oscillators for DC

[lancaIV]

"In essence you are talking just about two world views..... "or " in essence I am talking about one world by view-point of two "
Same opinion : different opinion reazon, arguments pro/ contra

Serious or like " agente provocateur" : danger of misunderstanding the action/ reaction ! Friendly or aggressive !?
Between family- members, friends, work-teams, sport-teams et cetera ....
Religion is also " Moderation", from past to today to future :

                     peacefull and with patience the right way searching and finding

[ayeaye]

Serious or like " agente provocateur"

This should not be a matter, this should be about logic. But weirdly it always appears to be a matter, why everything is made so exceedingly emotional, emotion versus logical argument. Find some reason to argue something, then push with hands and legs and teeth and nails, convincing that this is the only and completely right. Who become convinced, learn the method of convincing too, and find their obligation to be to convince others the same way.

[Bob Smith]

One of the simplest DC oscillators I've used is a reverse-wired relay switch and battery.
Bob

[Belfior]

One of the simplest DC oscillators I've used is a reverse-wired relay switch and battery.
Bob

How fast can we switch with a relay so that it won't break in few hours?

The simplest solution so far has been a BJT in reverse avalance so the base is hanging. I think it needs something inductive on the secondary side and not just an LED to work though.

I have also seen 2 mosfets connected to a battery and switching. Can't find the video anymore

[Belfior]

I wonder if I can connect a thyristor to this and make it switch? So find the thyristor that switches at 9V. Then charge the cap and when the cap is at 9V the thyristor (that has its gate also on the positive side of the cap) dumps the cap through itself and closes when the voltage drops.