Solar Joule Thief Circuits

[kcarring]

Nice job Tyson

Does it charge conventionally, or by way of the JT. I did a whole schwack of experimentation with trying to charge with both JT, and Bedini variants, and, well.. I came to the conclusion that current was always lost, and therefore chargtime increased. Interested to see if others' had more luck.

Thanks
Kyle

[SkyWatcher]

Hi kcarring, thanks for the reply.
Nope, no thoughts of saving the world on this one, just a fun little joule thief light for halloween that uses 1 AAA, instead of 3 AAA's.
Only took an hour to solder it up, pretty decent little light.
peace love light
tyson

[Jules Tresor]

Very godlike work Skywatcher

Hello SkyWatcher !!
I just discovered you thread while looking for a circuit to modify LED lamp for very low income area, and I am AMAZED !

You have done more than half way already to a useful energy saving, low cost light !!!!!!!!!!

Can you give us an update on your test runs with 1/2" toroid, 24G wire, 1.5kOhm resistor ? You were at 14 hours from a 2000mAh AA battery, for the 12 LEDs.
May I ask you a few questions ?

1 - Did you find better efficiency still ?
2 - how many turns were on your toroid ? I counted 2 x 10 on the picture.
3 - what transistor you recommend for that circuit ?
4 - are you willing to work again on that project and sharing the best design for an open source lamp for third world ?

Man I am time constraint but want to find a good circuit for lighting, using cheap parts.
I shall go to Nepal in a few months and want to bring such an Efficient Lamp there, and try to find a NGO willing to set-up a manufacturing workshop.
Millions of people are very isolated there in the mountains, without hope of ever having grip power.
Some NGOs install expensive solar or water turbine installations, but they waste a lot of money, and maintenance is such isolated places is a NO WAY.

Your circuit/testings are amazing, THANK YOU VERY MUCH !!!
Jules

[Jules Tresor]

Light in Nepal

Here is an example of Solar Lighting project in Nepal The Village Lighting Project

Lamps are donated, model is : Apollo Lantern - Black Diamond Mountain Gear
45 USD retail price, contains 1 LED 3Watts, using 4AA batteries, it gives 80 Lumen (ONLY!) for 60Hrs.



Each house pays 12 USD (1000Rupies) to get one lamp.
3 solar charging stations in the village.
It's to replace dirty kerosene lamps, and they say the light is better with the 80 Lumen from the LEDs !


more images of the village/people Taji Village in Lamjung District gets Solar Charged Portable Lights

[Jules Tresor]

Solar Tuki

Can we do better than the 69 USD solar Tuki ? Solar Tuki, E-Shop, Lotus Energy


Image from A Clean Solar Alternative to Kerosene Lamps, Nepal - GlobalGiving

[boguslaw]

Can we do better than the 69 USD solar Tuki ? Solar Tuki, E-Shop, Lotus Energy


Image from A Clean Solar Alternative to Kerosene Lamps, Nepal - GlobalGiving

Yes, you can ! With a knowledge presented here I think it is perfectly possible. I'm sad that I have no good experiment ability. I would however advice to combine slayer excitor or kacer device with reversed joule thief to recharge internal ion or nimh battery and small solar cell

[SkyWatcher]

Hi folks, Hi jules, thanks for the kind words, I would love to try and be of help in some way.
I need a little time to research those lamps you posted and compare to what I have done and the results I have seen with my own experiments to know if they are any better.
I notice the black diamond led lamp is only 10 lumens at the 60 hour rating and since I have no light meter I would have to research what a typical led outputs lumen wise to compare.
It's my wifes birthday today and I'll start looking into this more when i get home.
I have little resources myself, though not as little it seems as the people in the pics you posted.
Though to be honest, I bet there's no police rackets harassing people there and stealing and kidnapping them, unlike here, so in a way, we are not so much better off here in america, more like a prison here if you ask me.
So in some way, I am envious of they way they are living, in simplicity without control freaks and their minions breathing down their necks.
peace love light
tyson

[Jules Tresor]

Thanks to you SkyWatcher to look for new comparative tests.
Then we can discuss about the best model you have and how to compare it with lamps sold in supermarket.
May be making comparative picture in the night of your model and the original one would show already a big difference.
I'll be glad to send you a couple hundreds dollar for you to buy some material !
Let me know, you can PM me if you like ...
The guys at Panacea just ordered the material to replicate LaserSaber Low Power JT, with the small toroid. Laser says it's the most efficient JT he ever built.
I wonder if his JT could handle 12 LEDs in // as in your circuit ??
Your results seem to show that a smaller toroid is better
Let investigate some more in that direction ! To superefficient LED lighting !
Thanks for sharing,
Jules

PS : I prefer JT compared to Exciter because it has no HV field, and seems not disturbed by hand contact ... but I am NOT an expert in that field, so I might be mistaking ... if someone can make comparative test between JT and Exciters, then we could see clearly

[NickZ]

Here are some ideas of Jt circuits that I made some years back. They are still useful today as night lights for the bathroom and any other rooms or patio areas where light is needed. They don't cost an arm and a leg, as most items are obtained for free, and they can be moved around where they are needed. They also work great for emergency power black out conditions.

The solar circuit (third pic) needs a little bigger solar cell going to a rechargeable battery, but those can be obtained in the cheap solar walk-way lights from China at the dollar stores.
Hard to beat the ready made solar lights or Christmas lights that can light 60 to 100 leds, all night long.

The last picture is of a AA sized homemade cell lighting a Jtc.
Most of what I have made did not cost much, or was free, which can be adopted and used even by no income homes.
A totally useful led lighting circuit that needs no further attention is not that easy or cheap to make, or buy, yet. I wish it was...
The Lasersaber or totoalas multiple led bulb type of circuits is the best cheapest way to go, up to now.
NickZ

[SkyWatcher]

Hi folks, this is not really related to the thread topic, though something cheap that could be used to generate force or electricity is and could be used by the nepal people or others in the world.
Overunity is Here! - YouTube
peace love light
tyson

[goku_092966]

@ TS

May I know what transistor you used for this project. I happen to have this same lantern here at home for emergency lighting but I want to save on batteries.

tia

[totoalas]

Dodoshlodo JT Charger

Hi to all
If you visit youtube user Dodoshlodo

Great circuit for charging

Way back in 2010 I used solar cells from calculator 1 cm x 3 cm 2.5 vdc output to dodoshlodo charger 6 then to a 12 v 7ah battery or any kind of alkaline batteries

He used floro lamps 40 watts for lighting

Mine used 1 mA on a slayer 12 v dc circuit lighting an 8 watts fl lamp with minimum size of coil 10 cm 100 t and 9 t L2 1,5 cm dia on size 26 awg wire


Hope somebody can improve this

totoalas

[NickZ]

@ Goku:
The most efficient transistor is the 2n2222, but the kn2222A also works very similar. I've also good results by using the transistors that come (for free) in the discarded CFL bulbs, along with their small 3/8 inch toroid. You'll need a 1000 ohm (1k Ohm) resistor on the base of the transistor also, or you can burn the transistor, or get much less running time from your battery.

@totoalas: I've been working on the Slayer Exciter circuits lately, and would like to incorporate my homemade power cells onto that wireless circuit. So, I'm interested in how you managed to get 1 mA to charge a 12 volt battery from the tiny solar cell. Can you explain.
That small solar cell that I showed is also from a calculator, it puts out 3.4 volts (even in the shade), but only about 650 uA. They are really quite good for voltage, but hardly no current, so they will barely light an led by itself.

Your videos are quite amazing, how you can light so many led lights on such a small solar panel, as the source. I'm sure many people in the world that are without lights, would be interested in hearing more about that, also.
NickZ

[totoalas]

@ Goku:
The most efficient transistor is the 2n2222, but the kn2222A also works very similar. I've also good results by using the transistors that come (for free) in the discarded CFL bulbs, along with their small 3/8 inch toroid. You'll need a 1000 ohm (1k Ohm) resistor on the base of the transistor also, or you can burn the transistor, or get much less running time from your battery.

@totoalas: I've been working on the Slayer Exciter circuits lately, and would like to incorporate my homemade power cells onto that wireless circuit. So, I'm interested in how you managed to get 1 mA to charge a 12 volt battery from the tiny solar cell. Can you explain.
That small solar cell that I showed is also from a calculator, it puts out 3.4 volts (even in the shade), but only about 650 uA. They are really quite good for voltage, but hardly no current, so they will barely light an led by itself.

Your videos are quite amazing, how you can light so many led lights on such a small solar panel, as the source. I'm sure many people in the world that are without lights, would be interested in hearing more about that, also.
NickZ

Thanks Nickz
Its all because of the forum and people like you who inspire us to do the same

You solar cell calculator had good results .... but in realtime just what lasersaber did home application did stop me in doing more tests on slayer



The 1 mA im talking about is the near infinity Light Circuit by Slayer NILS circuit @ 1 mA output which I cannot replicate anymore after dismatling for another mod

For the 5 watts solar panel i used the Xee2 Joule ringer circuit and used lidmotor s photoresistor to switch on / off the light in daytime

400 ma is the brightest @ 80 percent brightness but you can walk around without tripping @ 200 ma all parallel led lamps using bradband cable wires

Dodoshlodo JT 06 is best tried 9 volt alkaline aa aaa and lastly the 7 ah sla battery simple construction ....

Happy experimenting

totoalas

[SkyWatcher]

Hi folks, Hi goku, that was probably a TIP41c or a TIP42 in that led lamp.
I was making some experiments replicating lynxsteams jule lamp, though not getting the efficiency I would like yet, so I am going to make some more experiments with ferrite joule thiefs and try to get my 12 led lamp to greater efficiency.
One thing that should be mentioned for those looking for ultimate efficiency, Lawrence Tseung has made many good experiments with resonance using joule thief circuits.

This particular prototype showed Tseung FLEET Comparison Index of 64 rms when built on Oct 10, 2010 in Hong Kong. It is soldered and not much tuning can be done.
The details are as follows:
Windings:
11 turns Joule Thief type
22 turns Transformer type
0.5 mm diameter wire
Frequency = 147 KHz
Input
Channel 1 (Instantaneous Voltage)
Vpp = 600 mV
Vrms = 80 mV
Channel 2 (Instantaneous Current, 1 ohm resistor)
Vpp = 188 mV
Vrms = 60 mV
Output
Channel 1 (Instantaneous Voltage)
Vpp = 10.4 V
Vrms = 3.4 V
Channel 2 (Instantaneous Current 10 Ohm resistor)
Vpp = 324 mV
Vrms = 92 mV
Calculations:
Input Power pp = 0.6 x 0.188 = 0.1128 watt
Input Power rms = 0.08 x 0.06 = 0.0048 watt
Output Power pp = (10.4 x 0.324)/10 = 3.369 watt
Output Power rms = (3.4 x0.092)/10 = 0.0306 watt
COPpp = 30
COPrms = 64
The verification is simply to display the waveforms and check whether the true COP is greater than 1. The actual numbers are unlikely to come out identical as in all pseudo resonance experiments.

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peace love light
tyson