Joule Thief

[dasimpson]

if the input is ac they they is no need for the transistor and resistor unless the joule thief acts like a cap by storing the powr in the toiord if you catch my drift

[dasimpson]

chaining jt's wont work because of so little current to run the second jt

[The Observer]

Da,

Chaining JT's does work... since it does need DC... all you do is put a Cap and Diode at the output and walla you have a DC Source for a second JT.

I guess it would be 1/2 of a charge pump that provides the DC Source.

Best Regards,
                      The Observer

[dasimpson]

i stand corrected lol but dose the second joule thief put out more power then it would off a as a singl jt on a battery
and i have done it my self but just got a slow pulsed led but very very bright
for me for this to be working it would have to be twice the volage output as a single jt and the light must be always on

the idea i have is if you used a small solar panel running a jt off  it then a second jt off the first for upping the power more to say charge a offgrid batterys bank

[The Observer]

Da,

Well since each Spike is really many Spikes.. it may be possible to hook the Second Joule thief to a resonant circuit that is drivin by resonant ring.

I understand your Solar/JT/JT idea.

Mine is Penny Pill Jars/JT/JT to provide alot of power from a little.

The Observer