Lasersaber strikes again. A joule thief king ?

[d3x0r]

I did have a setup that had a mode that was a touch-sensor... very reliably; used a tiny inductance coil (24 turns 1" mobius) , and touching the coil on the low side of the LEDs (opposite the base) would make it turn on very brightly.  very very reproducably.  Often I end up using my body as the Megohm resistor for starting (toughing power and other points on the circuit) but this was just me touching it; and I was fairly not grounded.... thought about filming it; but I doubt it's reproducable effect

[MarkE]

I did have a setup that had a mode that was a touch-sensor... very reliably; used a tiny inductance coil (24 turns 1" mobius) , and touching the coil on the low side of the LEDs (opposite the base) would make it turn on very brightly.  very very reproducably.  Often I end up using my body as the Megohm resistor for starting (toughing power and other points on the circuit) but this was just me touching it; and I was fairly not grounded.... thought about filming it; but I doubt it's reproducable effect

Sounds like capacitance.

[TinselKoala]

Yes, capacitance. I've got them that do this too. Even this present circuit will do it when properly tuned.

I can't find 2sk170 locally and I keep forgetting to order them.



Meanwhile, more on burst oscillations, or rather oscillation bursts. There are at least three different oscillations happening here.

[Preva]

И снова ЗДРАВСТВУЙТЕ!
Сделал схему не на броневом сердечнике, а на феррите от строчного трансформатора. Вот, что получилось


http://youtu.be/iTVlVBkm_CA


Интересно, что трансформатор работает как с ферритом, так и без него.


И до сих пор не могу добиться работы схемы Lasersaber более 10 минут с конденсатором 4700 мФ







And again HELLO!
I made the scheme not on the armored core, and on ferrite from the lower case transformer. Here that turned out


http://youtu.be/iTVlVBkm_CA


It is interesting that the transformer works both with ferriy, and without it.


Also I can't still achieve work of the scheme of Lasersaber more than 10 min. with 4700 mF

[a.king21]

Preva:  you need to use exactly the same transistor. Other transistors won't work.