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Which transistor is best for joule thief between BC107 and BC547? Answered

I want to make a joule thief to run led's from my death batteries.I have 2 transistors,BC547 AND BC107. Which transistor should I use to make a low voltage joule thief ?

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user
-max- (author)2015-12-25

A germanium signal transistor might be what allows you to get down to insanly low voltages, since the junctions in standard transistors need about 0.6V just to conduct.

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user
Crazynventor (author)-max-2016-01-15

Can u plz tell me which germanium transistors are best for very low voltage joule thief.

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user
Josehf Murchison (author)2015-12-25

They are about the same the BC107 is 300 mW and the BC547 is 500 mW allowing a greater range of use.

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