Joule Thief

[dasimpson]

May i ask what possible reason for my led not to light up when i connect my primary winding to base of transistor?

are you saying you remove the resistor?
if so that wont work to well as the base has to have less current running thry it then the collector for the mag feilds in the winding to work

[dasimpson]

are you saying you remove the resistor?
if so that wont work to well as the base has to have less current running thry it then the collector for the mag feilds in the winding to work

also you need to run an led over 2.4 volts otherwise they is no need for the jt

[dasimpson]

i am killing my rechargable batterys at the moment testing i was just woundering if they is a way i could make it so the battery turns off at a set voltage drop .90 to 1v if possible

[nievesoliveras]

Good Luck!

Jesus

[dasimpson]

i have just had an idea.
here goes the ouput of a jt is pulsed dc correct ?
so what if we put this into a step up transformer.
100 turns to 1000 turns this should up the voltage.
now if we take the output of that step up transformer and then do the reverse step it down but the same way we steped it up.
if i understand transformer right this should give us more ampage but i am not counting the losses that tranformers have.
or maybe what happens in theory dosent always work in practice

i guess as long as they are no diodes in a car coil maybe that be worth a try