+- +-

+- User

Welcome, Guest.
Please login or register.
 
 
 
Forgot your password?

+- Stats ezBlock

Members
Total Members: 144
Latest: Donald
New This Month: 0
New This Week: 0
New Today: 0
Stats
Total Posts: 2267
Total Topics: 110
Most Online Today: 14
Most Online Ever: 82
(August 07, 2018, 06:56:59 PM)
Users Online
Members: 0
Guests: 3
Total: 3

Author Topic: Joule Thief- Joule Ringer  (Read 40601 times)

Offline crazycut06

  • Full Member
  • ***
  • Posts: 131
Re: Joule Thief- Joule Ringer
« Reply #15 on: May 26, 2012, 03:12:45 PM »
Ok thanks, is it why you only used 6v, with 12v the output is much higher, and sorry for your led bulb  ;D

Offline Hitman

  • Full Member
  • ***
  • Posts: 168
    • itawk.com
Re: Joule Thief- Joule Ringer
« Reply #16 on: May 31, 2012, 03:55:23 PM »
Heres one appliction the SJT can be used in:



This system has been running for over 24 hours on a single 6v battery.


Offline Hitman

  • Full Member
  • ***
  • Posts: 168
    • itawk.com
Re: Joule Thief- Joule Ringer
« Reply #17 on: June 02, 2012, 08:11:15 PM »
This is getting fun :)



« Last Edit: June 05, 2012, 07:41:36 PM by Hitman »


Offline Romero

  • Administrator
  • Hero Member
  • *****
  • Posts: 885
Re: Joule Thief- Joule Ringer
« Reply #18 on: September 28, 2012, 12:28:41 AM »
Today I made a quick experiment with LaserSaber's circuit version 3.
I used a normal transformer 220/24 volts instead of the ferrite core rod.
I used 2 times 3watt leds bulbs with a 15watt bulb in parallel (will not start if I don't have some rezistive load)
I pointed the bulbs towards a small 2.5 watt solar panel that I connected to the source battery.
I also used a diode between colector and emitter for recovery.
Results.. please replicate and see for yourself.

Romero
« Last Edit: September 28, 2012, 12:30:52 AM by Romero »

Offline Dave45

  • Full Member
  • ***
  • Posts: 145
Re: Joule Thief- Joule Ringer
« Reply #19 on: October 02, 2012, 01:37:39 AM »
Does the solar panel charge the bat
how long have you let it run
too cool

dave

Offline Romero

  • Administrator
  • Hero Member
  • *****
  • Posts: 885
Re: Joule Thief- Joule Ringer
« Reply #20 on: October 02, 2012, 08:50:14 AM »
Does the solar panel charge the bat
how long have you let it run
too cool

dave
I am not 100% that the battery will remain charged after many days.
I had it on for about 5 hours and the battery shows the same voltage.

Romero

Offline garrym

  • Jr. Member
  • **
  • Posts: 59
Re: Joule Thief- Joule Ringer
« Reply #21 on: October 02, 2012, 10:27:32 AM »
Much better results of less current draw, with half or both halves of tv yoke rather than xformer.

240v 5.3w (equiv 30w) osram led using 12v and .7A - still 8.4w input.


Garry
« Last Edit: October 02, 2012, 10:33:11 AM by garrym »

Offline crazycut06

  • Full Member
  • ***
  • Posts: 131
Re: Joule Thief- Joule Ringer
« Reply #22 on: October 02, 2012, 11:53:19 AM »
Nice results Garry!

Offline garrym

  • Jr. Member
  • **
  • Posts: 59
Re: Joule Thief- Joule Ringer
« Reply #23 on: October 02, 2012, 01:08:01 PM »
Once you have the led bulb lit, disconnect the collector connection and the amp draw goes down
to .06 amp (60mA) and brightness drops drastically.

What is interesting is the bulb remains just lit.

Garry

Offline Hitman

  • Full Member
  • ***
  • Posts: 168
    • itawk.com
Re: Joule Thief- Joule Ringer
« Reply #24 on: October 02, 2012, 04:45:06 PM »
I've been working with lasersaber's circuits since the month of june now and I can honestly say they work very well and once tuned to your load you can usually cut your power consumption by half. What I mean is if you connect an 8watt bulb to your SJR, the amount of watts in should be about 4 watts to get the same amount of brightness as if it were connected to mains power at 8watts.

I started testing a unit I built in july to see if it was reliable and didn't have any adverse effect on the expensive LED bulbs.
Pic #1 - is the SJR unit, the switch on top of the meter is to switch between a mosfet light sensor on or off.
Pic #2 - is the back of the unit with AC output and the 1/4 jack is to connect a CDS cell.
Pic #3 - is a very old 6volt golf cart battery used to power everything.
Pic #4 - 8watt solar panel that keeps the battery charged.
Pic #5 - 2watt led bulbs, there is a total of 6 of them connected with bell wire outside surrounding my lab.

Pic # 6-7 is another SJR unit I built for camping this summer but with an internal 12v battery and a small solar panel to charge during the day.

@romero
I'll start you solar panel test today.

Cheers Hitman

Offline garrym

  • Jr. Member
  • **
  • Posts: 59
Re: Joule Thief- Joule Ringer
« Reply #25 on: October 02, 2012, 09:57:01 PM »
Hey Hitman,

Can we have some detail on the "Tuning" that allows you light the 8w on about 4w.

Is this just adjusting the length of the coils ?

Garry

Offline Hitman

  • Full Member
  • ***
  • Posts: 168
    • itawk.com
Re: Joule Thief- Joule Ringer
« Reply #26 on: October 02, 2012, 11:20:32 PM »
@garrym
I usually place a pot between the base and neg rail, starting with max resistance I slowly decrease the pot till I see a sudden jump in light intensity, that position is your first tuned spot, play around with it you'll see what I mean.
I've also noticed that once in oscillation with certain loads I can completely open the circuit going to the base and the light will continue to shine using the absolute least current draw, the light intensity does go down a little but not much.

Oops I forgot to tell you that I was using standard transformers 240v - 12v and 120v - 12v.

Seems like my SJR 3 is taking more power then the SJR 2 although it is nice that there is no more current draw when the load is disconnected.

@romero
I used a really dead 12v SLA battery to test your solar panel test, and it wouldn't even light up the lights till I boosted it with a 12 volt boost.  Once it started up I disconnected the 12v boost and hasen't died yet  :)

Cheers Hitman
« Last Edit: October 02, 2012, 11:23:02 PM by Hitman »

Offline Hitman

  • Full Member
  • ***
  • Posts: 168
    • itawk.com
Re: Joule Thief- Joule Ringer
« Reply #27 on: October 03, 2012, 04:26:46 AM »
I made this video just for you garrym :)



The transformer I used was a small 240v - 12v, I get about the same results with a small 120v -12v transformer but when I used a large 10amp 120v - 12v transformer amp draw to light a 2 watt led bulb increases to 400ma. also adding a pot to the base and Neg rail does nothing but increase amp draw.

@romero
The solar panel test is dieing, voltage is at 8.6volts and lights are very dim. One thing I noticed is you have a recovery diode and I don't, I'll stop before I kill my battery and I try again tomorrow with a diode installed.

Cheers Hitman
« Last Edit: October 03, 2012, 04:31:26 AM by Hitman »

Offline Romero

  • Administrator
  • Hero Member
  • *****
  • Posts: 885
Re: Joule Thief- Joule Ringer
« Reply #28 on: October 03, 2012, 12:23:59 PM »
@Hitman
try again using a recovery diode between C-E.

Romero

Offline Hitman

  • Full Member
  • ***
  • Posts: 168
    • itawk.com
Re: Joule Thief- Joule Ringer
« Reply #29 on: October 03, 2012, 06:16:11 PM »
@romero
Before connecting up the diode I wanted to see what recovery voltages were being produced across a 1uf cap in series with the diode and got a reading of only 6volts dc.
I then reversed the diode and instantly got a reading of 145volts dc on the cap, one wonders how much power you can pull of this cap without affecting the input ???? I'll finish the solar panel test then check it out :)

Cheers Hitman


 

Recent Topics

Romero Experiments by Romero
March 03, 2018, 10:43:52 PM

Dji Mavic Pro by Romero
September 27, 2017, 05:04:54 PM

Watersplitting Device via GigaHz pulse Generator by Hitman
June 23, 2016, 05:45:13 PM

Free Energy Flashlight by Hitman
February 24, 2016, 12:35:30 PM

Earth's magnetic field by Romero
January 09, 2016, 05:47:42 PM

Induction Heater of Vasily Kuznetsov by Hitman
July 01, 2015, 10:41:39 PM

Partnered output coils by Romero
June 20, 2015, 01:51:23 PM

Articol de incurajare by sinergicus
February 23, 2015, 12:54:41 PM

Dave45 work and suggestions by Dave45
December 13, 2014, 05:43:42 PM

THE MOST PROFOUND RE-DISCOVERY OF ALL TIME by Hitman
October 18, 2014, 03:54:19 PM

Powered by EzPortal