Joule Thief

[timmy1729]

@Bill
Where in the circuit do I connect the pot? I've got an unused one from 10 years ago when I made a guitar. Hey!!!     Speaking of guitar... ...
Could there be a use for a guitar pickup? It is simply 6 pole magnets wrapped with VERY tiny wire thousands of times. I've got a spare bass pickup and maybe spare guitar pickup that I could try!

[jeanna]

@xee2,

I saw your suggestion.

Here is what I am reading off my dmm:

battery itself 1.25VC, also  2VAC
across unlit led 1.25VDC IN EITHER DIRECTION, also 2VAC

On 1 of the leds: 1.2VAC, also  0 .003Vdc
On the other: 1VAC, also 0.001Vdc

Wow, that is interesting.

cool!

Thank you

jeanna

[Mk1]

@timmy

So far i have not found any use for guitar pickups in this project.You are very welcome to try, I play and build guitar as well.

If anyone wishes to hear me (this is my blues project) http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile&friendid=300671855

[timmy1729]

@timmy

So far i have not found any use for guitar pickups in this project.You are very welcome to try, I play and build guitar as well.

Is there any particular reason for not using them?

[jeanna]

@jeanna

I don't see the diodes, remember that by connecting leds directly to pickup coil is working but a no no because when the current goes to led it is coming out at the other end and you send it back in the coil,reversing the ripples in the bucket killing efficiency .

I am waayy behind you on this.

When The basic light went out but the 2-y/pick up light went on, I had to check out all these things I did up to now.

however,
I am unsure about the bridge rectifier. Each 2-y pick-up only gives me 2 wires.

Since the 2-y(that means secondary) Is not connected to anything else in this circuit, I need some directions.

Maybe there is a post I missed. I will try to see.

thanks mk1 - this is really terrific, and I appreciate all your help. BTW I am glad you said french. That will help me to understand what you write.

Jeanna