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Overunity Machines Forum



25mV Joule Thief powered by peltier merely using our body heat -Free energy 24/7

Started by magpwr, December 20, 2012, 09:26:33 AM

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0 Members and 2 Guests are viewing this topic.


Legalizeshemp420

Quote from: TinselKoala on October 02, 2013, 02:36:44 AM
10 for $5.50 from China:
http://www.ebay.com/itm/10PCS-Transistor-TOSHIBA-TO-92-2SK170-BL-K170-BL-100-Genuine-and-New-/360683877467?pt=LH_DefaultDomain_0&hash=item53fa6f345b

I found some BC337-25s in a US Ebay store, 50 for $3.20, free shipping, so I'm ordering.
That last part tickles me but the first part is only for now since the main manufacturers have closed down those transistors which sucks.

magpwr

Quote from: Legalizeshemp420 on October 02, 2013, 03:44:36 AM
That last part tickles me but the first part is only for now since the main manufacturers have closed down those transistors which sucks.

hi Legalizeshemp420,

If you need latest 2SK170 in SMD format SOT-23  .Do search for LSK170 it's the only company which continue the Toshiba J-FET.

Please don't bother or waste your time searching for better ones.I have already tested with over 20 version of J-FET.
As i have previously mention the 2nd best one is 2N3972 (cost lot more around $7 in ebay)which can start osc at 22mV but it's current\load handling is really lousy.

The circuit posted in youtube was my prototype.If you want to improve current handling please connect "low vce drop" 1 npn transistor in parallel with 1x J-JET 2SK170 or LSK170.

Best selection for NPN transistor is ZTX-1047 ,ZTX1048 these if shorted between collector and emitter manually can osc as low as 29mV or 30mV or go for Japanese transistor 2SD1450 45mV which was shown in my older youtube video.

This is the only lowest voltage Joule Thief which exist in youtube and cost less than <$10 or <$5 to make.
If you plan to run on 1XAA (1.5v and below)do change the only resistor to around 22k.

I only reveal the best to public.

Legalizeshemp420

The LSK170 datasheet shows a TO-92 and a SOT-23 package but very hard to find a distributor in my one Google search.

Pirate88179

See the Joule thief Circuit Diagrams, etc. topic here:
http://www.overunity.com/index.php?topic=6942.0;topicseen