Storing Cookies (See : http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm ) help us to bring you our services at overunity.com . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
https://overunity.com/5553/privacy-policy/
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding

User Menu

Custom Search

Author Topic: Smoothest, and best, store purchased Joule Thief I have seen yet.  (Read 40141 times)

TinselKoala

  • Hero Member
  • *****
  • Posts: 13958
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #15 on: October 16, 2013, 04:26:11 PM »
The black blob covers the chip.
There are more than two connections to the chip, I believe, two traces visible on the foil side connecting components and two solder blobs connecting wires.
The green resistor-like thing on the component side is an inductor.

I think this is essentially the same circuit as the one posted above with the ANA608 chip, which is tiny, barely room for the four leads. A smd version would easily fit under the blob.

Legalizeshemp420

  • Full Member
  • ***
  • Posts: 130
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #16 on: October 16, 2013, 04:26:37 PM »
Schematic?
I got sick yesterday so finishing up now but still not 100%.  I am sad but DALM circuit is no more as I reimaged my drive and that is what I lost. :(  All I have left is the video on YT but should be easy to reproduce if I need to.

Legalizeshemp420

  • Full Member
  • ***
  • Posts: 130
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #17 on: October 16, 2013, 04:38:16 PM »
Here we go:
D1 - IN5819
R1 - 20K 5%
R2 - 100K 5%
R3 - 5.6K 5%
C1 50pf 10%
Q1/Q2 S9013
L1/L2 150uH 10%

TinselKoala

  • Hero Member
  • *****
  • Posts: 13958
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #18 on: October 16, 2013, 06:41:22 PM »
1n5819(g)  is a common Schottky rectifier diode.



Legalizeshemp420

  • Full Member
  • ***
  • Posts: 130
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #19 on: October 16, 2013, 06:53:44 PM »
1n5819(g)  is a common Schottky rectifier diode.
and?

TinselKoala

  • Hero Member
  • *****
  • Posts: 13958
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #20 on: October 16, 2013, 09:58:20 PM »
And... here's the data sheet for it. Up there, I mean.



Legalizeshemp420

  • Full Member
  • ***
  • Posts: 130
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #21 on: October 16, 2013, 10:02:00 PM »
And... here's the data sheet for it. Up there, I mean.
Yep, I knew it was Schottky barrier diode but all parts listed in the parts list are what is on this board (Q1/Q2 were changed in the simulator because S9013 is not available).

Pirate88179

  • elite_member
  • Hero Member
  • ******
  • Posts: 8366
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #22 on: October 17, 2013, 01:56:23 AM »
The black blob covers the chip.
There are more than two connections to the chip, I believe, two traces visible on the foil side connecting components and two solder blobs connecting wires.
The green resistor-like thing on the component side is an inductor.

I think this is essentially the same circuit as the one posted above with the ANA608 chip, which is tiny, barely room for the four leads. A smd version would easily fit under the blob.

Thanks TK.  I had no idea there was an IC that would run on 1/2 volt, which is about what these run down to before the lights go out.  If this chip will do this I should make a JT with one of my own coils.  I have stayed away from using chips because most of them need like 5 volts to run.  (555's, etc)  Why did they enclose the chip in that blob?

Bill

***EDIT***

LH  Thank you for pointing out the same thing.  I had no idea that green resistor looking thing was an inductor.  I have several of those in my resistor collection box from electronics that I have salvaged parts from.  I guess I need to place them in another bin.

Legalizeshemp420

  • Full Member
  • ***
  • Posts: 130
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #23 on: October 17, 2013, 03:18:29 AM »
Over the last 30 years whenever I opened up a China, or Japanese, cheap electronics item I almost always found that blob.  Back in the day (circa early to mid 80's) if it had a piezo speaker it always had that blob.  That blob always ended my exploration because there is nothing we can do with it. :(

What is ironic is that these chips can be ran on such a low voltage.  Look at my video where I show a square wave that makes the solar powered figures dance.  That is no battery and at less than half a volt.  Only discrete part on it is a 10v 470uf 105c Electrolytic capacitor.  The black blob has 4 connections.  2 for the solar panel (.5v) that has the cap in parallel with it and two going to the pancake coil.  It makes a wonderful square wave pulse that the time, and amplitude, is dependent upon the voltage it receives but it is always a clean square wave.

TinselKoala

  • Hero Member
  • *****
  • Posts: 13958
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #24 on: October 17, 2013, 05:04:58 AM »
Yep, the chip is a little low-power square-wave oscillator.
Which gives me an idea. A friend of mine gave me a bunch of these:
http://www.surplus-electronics-sales.com/index.php?main_page=product_info&cPath=38&products_id=589
They need a 5v supply but make a very nice accurate and clean square wave output.

Legalizeshemp420

  • Full Member
  • ***
  • Posts: 130
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #25 on: October 17, 2013, 05:12:03 AM »
Yep, the chip is a little low-power square-wave oscillator.
Which gives me an idea. A friend of mine gave me a bunch of these:
http://www.surplus-electronics-sales.com/index.php?main_page=product_info&cPath=38&products_id=589
They need a 5v supply but make a very nice accurate and clean square wave output.
Isn't that a sine wave oscillator?

TinselKoala

  • Hero Member
  • *****
  • Posts: 13958
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #26 on: October 17, 2013, 05:27:33 AM »
Isn't that a sine wave oscillator?
That one may be, sorry. I have the MTO version which is definitely a square wave. The distortions you see are caused by my casual hookup.

Legalizeshemp420

  • Full Member
  • ***
  • Posts: 130
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #27 on: October 17, 2013, 06:00:42 AM »
Hmmm, that is kinda nice even with the distortion.  Maybe use it in a pulse generator?

Where did you find the documentation for your version at?

TinselKoala

  • Hero Member
  • *****
  • Posts: 13958
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #28 on: October 17, 2013, 06:31:19 AM »
Here's the closest thing to a "data sheet" I could find.


Legalizeshemp420

  • Full Member
  • ***
  • Posts: 130
Re: Smoothest, and best, store purchased Joule Thief I have seen yet.
« Reply #29 on: October 17, 2013, 06:47:08 AM »
btw, I just did a freq measurement on that circuit I showed for the sq. wave osc and it had a period of 180.162 ms.  That comes out to be about 5.5hz using my flashlight.  In direct sun I have no idea what this would be at.