Joule Thief

[Mk1]

@pirate

I have not made any test so far to how long it would last,but what i can say is it will work until about .3 volt is left in the battery.
So transistor need different minimal voltage to operate.The batteries we call dead are still full but we can' t use it anymore because most circuits are running at a set voltage, if the battery drop under that point it stops working but the battery is still ad 1.4 to 1.5 and ready for the trash, this is not efficient in any way we need to make sure it works with the minimal energy input, There is 2 ways to make it better work on the output power and lower the input both will increase the power factor and but default the battery will need to go real real dead.
But honestly i don't intend on running from a battery .

The transformer you got should work to get more power it needs at least 3 coils.

[Pirate88179]

@ MK1:

Thank you.

Bill

[timmy1729]

using a larger core for your transformer will give you greater energy storing capability. if you're not driving larger tubes or multiple leds it's not really needed. always worth a try bill, $50 is pretty steep. i would look inside cast off switch mode power supplies like from a computer. there is usually a pretty big toroid in those, around 1 1/4" od and often already wound up bifilar. would at least give you an idea of how better bigger is without dropping half a benjamin.

Yeah, the old PC power supply I took apart was from an AT case. It had two torroids, one smaller and the other larger, both of which I made into my JT's. They were wound already, but the larger one had eight wire ends to deal with. I didn't know what to do with those so I took them off and rewound it bifilar. The larger one was nearly two inches in diameter. It also came with a ferrite choke that was a ferrite rod with some bare copper wire around it. I'd love to use that if someone can tell me what can be done with it.

[innovation_station]

 

post a pic of it ....



ist.

[Mk1]

@All

I have a bag full of toroid,I pick up anything electronic most parts are as good as new ,big caps for free, pc power supplie will usually have at least one but may have many, printer are also good, Radio etc.They are packed with resources, we payed the big price for them they ad to mine minerals
extract them put them in parts assemble in circuits that are as valuable as the part, you would not believe the things that can be found that way,tech and parts,(Someone will make sure that you will get the parts you need lol ) then send to land field or back manufacturers to cut cost and make money again.Recycling benefits only those that do them self.If a country needs a certain mineral you make it in a daily used thing so the people drive the price down for them, one more step declare them hazardous to nature and make strict rule for recycling and then you get that mineral for free.Get the picture now?And have part to rebuilt.

In my area i have access to any parts i can buy cheaper then most of you (ridiculous cheap) within a 20 min radius by foot.
But only go when i need a specific part i don't have or really important part you should always have.