Joule Thief

[Light]

why to look back, look frwd
you even can build a brand new kind of motors on exactly the same principle of TRansistor OScillation well known from mid fifties of last century and known now under nick-names "joule thief", "kacher", "blocking generator" :
http://www.youtube.com/watch?v=VEn-3xOSSHg

[SkyWatcher123]

Hi folks, thanks for all the replies, though I'm aware of all the past information, I just thought the multistrand observation was worthy of sharing.
And it does not matter if tom, dick or harry already discovered it, it still is interesting and easy to make the coils that way.
Hi nickZ, of course koolers 70 led setup drawing 27 milliamps is great, though if nobody can replicate that performance, whats the point.
Try out this multistrand setup if you wish and see if it has any benefits.
peace love light
tyson

[WilbyInebriated]

But it seems that some people are too lazy

indeed.



@skywatcher
your tip31 works well (and uses more power) because it is a 'darlington'.

[Pirate88179]

indeed.



@skywatcher
your tip31 works well (and uses more power) because it is a 'darlington'.

Darlington means 2 transistors really....right?

Bill

[WilbyInebriated]

Darlington means 2 transistors really....right?

Bill

correct. it gives higher current gain than each transistor alone. one can also use a pnp and a npn to form a 'complimentary' darlington pair. on the other hand, the base voltage req. will double as well, and they don't switch as fast.