Joule Thief

[electricme]

@jadaro2600,
Hello there, I see you still have trouble with connecting a ammeter to a circuit.

Hope this helps you.

General Jim

[hazens1]

Even though the meter is brand new and also the batteries in it are new, I did change them out to make sure. About 10 minutes ago I disconnected the circuit from the battery and in about 120 seconds, the battery voltage went from 0.417v to 0.758v and stabilized then I hooked it back up and in about another 120 seconds it was down to 0.425v slowely crawling down to 0.420v over the next 120 seconds and now its back to 0.417v. This sure is some weird reactions. The battery is a Rayovac 1.5v AA, standard Alkaline. I'm going to let it run all night, take some measurements, then maybe I'll disconnect it and let the battery rest while I'm at work and see what happens.

I want to replicate it, but I don't have another identical toroid, I might try a larger and a smaller with the same wind and wire and compare the results.

I'm waiting on some components to try out the latest Gadget/Mk/Jeana/Fusion circuit, so right now I'm trying to learn as much as I can.

If anyone can explain how I can pick components (transistor/wind/etc..) to get the desired frequency, that would be great. My ideal circuit would oscilate at a frequency that the eye sees as a constant light, but has a high light output with a short duty to be as efficient as possible.

@hazens1:
That is indeed peculiar.
Battery discharge curves might not be completely linear, but this 18 hour period seems
too unusual.
First i would check the battery status of your voltage-meter (forgive me if you have done that of course)
but some people ran into weird readings just to find out that their meter was not operating accurately anymore.
Second, ... KEEP THAT BATTERY !!! 

Too bad not too many of us have oscilloscopes (me neither), that could show the frequency and
would/would not explain something.

Try to repeat the experiment )

[jadaro2600]

17ma ...it's ability to light a parallel of LED's is proportional to the capacitance in the capacitor at the bottom right.  100nf currently, although the capacitance could be a little lower and will still function, notice though that the second from the bottom LED is fidgety.

[jadaro2600]

@jadaro2600,
Hello there, I see you still have trouble with connecting a ammeter to a circuit.

Hope this helps you.

General Jim

Fuse was blown, figured it out though..

[electricme]

@ Gadgetmall
Thanks for posting the 555 timer IC with the diode and coil attatched.

OK D1 job is to prevent spikes from the collapsing coil from destroying the IC.
If you want to use the spikes, and save the IC, remove the D1 from its present position, and place it between + and 1 (coil terminal)
put another D between IC 3 and 2 (coil terminal)

Then solder a bridge diode for full rectification between 1 and 2 (coil terminals).


General Jim