Joule Thief

[Pirate88179]

@The NOP:

I was just thinking about your idea and I believe you are right.  I could make a contact in a radis shape of the arc described by the movement and mount that on the base lower on the bird's body in order to have contact earlier and longer. The trick will be do it in a way that has like 0 drag and still have contact.  I feel like I have already increased the resistance in the circuit as I used to be able to (as done in my earlier videos) just touch the contact for 1 second and have it light for almost a full minute.  Now, with thinner wire and less contact area, which I believe gives me increased resistance, I don't get as much bang for my buck on the contact.  I will think about this some more but, I think it is a good idea and I really appreciate your suggestion, thank you.

Bill

[jeanna]

@All,

I did a wee bit of work tonight. Photoshop work, that is.
I never gave any voltages on this surprising circuit, and I thought you ought to see what I saw.

I took measurements from 4 circuits yesterday.
Here are the results of one of them.
They are all similar.
I put the interesting numbers of volts in turquoise on the colored schematic.

I forgot to type in the amps draw from a 1.29vAAA battery = 31.6mA for the 2 tier ckt.
The first tier all by itself weighs in at 36mA

Have a look:

jeanna
edit.
hmm it's a bit light.
All the measurements were taken with the ground where that round dot is. = the negative side of the "secondary" leds and stuck the probe and measured at the spot with the arrow. I used the scope for these numbers.

[Pirate88179]

A few pictures of my Lab Assistant and roommate inspecting a mysterious device in her living room.

Bill

[dog812]

@gadget Ill pick some N3904's up tomorrow.

@jeanna
Here is a couple pics.. i am testing using 15 whites right now just to see how long it will last.
http://www.postimage.org/image.php?v=Pq21aVJ0
http://www.postimage.org/image.php?v=Pq21a_Ii
http://www.postimage.org/image.php?v=Pq21b4HA


I bought some 50k Pots today.. but i cant figure out how to get them to work? Is there a link somewhere?

[TheNOP]

I bought some 50k Pots today.. but i cant figure out how to get them to work? Is there a link somewhere?

http://en.wikipedia.org/wiki/Potentiometer

use the center terminal(the wiper) with one of the other.

to find it, with any kind of potentiometer, you can test with an ohmsmeter.
you will know witch one is the wiper when turning/sliding the knob don't change the resistance.
that will mean your probes are not on it