Joule Thief

[TheNOP]

I notice from the xee2 post, #5903, that he appears to be supplying 50mA
at 1.5v, and driving a flourescent tube marked 5 watt.

Is this load actually 5 watt? If so, your overunity counter should be off the
scale.

Paul.

you can't simply assume the output of his jt is 5 watts just because the tube is rated for 5 watts.

[xee2]

@ Paul-R

Is this load actually 5 watt?

No. The power delivered to tube is less than power used from battery.

[gadgetmall]

@All
For those of you interested in Earth Battery Jt stuff here is a little simple circuit that takes the EB and charges up an ultracap and uses a small solar panel to detect night and turn on your Jt . the advantage it the solar panel not only is the light detection but also helps charge if there is sun as an advantage . this Works very well !!!

[xee2]

@ gadgetmall

It looks like the 69 mA is with no load. I think that battery drain will increase when fluorescent tubes are put on output. Can you check to see what battery drain is when your circuit is lighting a fluorescent tube?

[TheNOP]

@ gadgetmall

It looks like the 69 mA is with no load. I think that battery drain will increase when fluorescent tubes are put on output. Can you check to see what battery drain is when your circuit is lighting a fluorescent tube?

from my experience, it will more probably drain less with a load.