Joule Thief

[gadgetmall]

Really?
I thought the entire idea of the crystal radio was to use a very sensitive germanium diode
in order to utilise the extremely weak signals... And since red LEDs and schottkys tend
to need much higher voltages to work, I would expect a crystal set with them instead
of the Ge diode to be a lot less effective with weak input signals...
... but I suppose they can work if the coils transform the weak input to a higher
voltage pulse in a JT variation that merely uses the crystal set to get input.
It's a good idea to try anyway.

Still, I wonder which producs more, a fullblown crystal set circuit, or the
relatively simple "Tate Ambient Power Module" (which is in fact a simple
rectifyier using sensitive Ge diodes to catch even the smallest fluctuations).
I wonder since a crystal set is basically a Tate module with a tuned/tubeable
LC circuit attached...

Anyone?

@Al/Fusionchip/Gadgetmall:
Nice pics there!
Did you post a schematic of this circuit earlier? If so, I must dig around
in the thread to find it. If not, are you going to?
Definately something to try and replicate, that circuit of yours!
lol "Medusa coil"... I suppose that refers to the coil shag and not
to how vicious it bites?

Regards,
Koen

Hi Koen . Yes i will be posting the schemitic as soon as i can draw one up . Every time i post one there is always something backwards or missing and i have to be corrected . I will take My time this time and make sure i draw it correctly then have Nieves Look at and see if see anything that looks wrong . I am getting used to a circuit program . Building it is one thing , putting it on paper is another ..
BTW . yes the Medusa Coil is wound tight except the three secondaries are just thrown on there  :)Cant decide if it Looks like a bush or Medusa's head  )

Al

[innovation_station]

here is a picture of the mk2 hooked up working ...

i can add the bridges ...  without effect to the unit ...

next i will hook up the crank jobbie curcuit ...

ist

[Mk1]

@jesus and gadget

Congratulation ! great work !

@all

Great thing are happening here lest not forget the power of the collective mind !
I am really proud of all of you! And for all your work and faith.
We did not get confused in 200 years old laws, but made our own laws !

Thank to all of you!

@ist

Real nice , and great picture !

This site is so busy , i cant see it , lol

[Mk1]

@all

I got one other little secret , to get this , you will need to test it to understand.

To test this , you will need a brush motor , a led , and a coil ( it can be a selenoid , i use a coil from a hair clipper , real nice about a 1000 feet 30 gage wire coil.

Ok not take the motor and connect to led , hand turn the motor, yes the led light but the motor will get harder to turn , because of the feedback to it. Now put a coil in series with the led , now the motor turns freely and led light.

Whit that coil now it is possible to run a dc motor from a cap , and keep the cap charged with the jt.

Btw , the clipper coil gives me over 120 volts ac , when i use it on my bedini.

[nievesoliveras]

I was thinking about making a fox hole radio.
And replace the head set with a rectifier and see if I could get enought voltage to run a JT.

Here is a link that shows how to build one.

http://bizarrelabs.com/foxhole.htm

I would like to build one.

Yes, that should be doable.
Although, if I recall my crystal radios 101 correctly, such a foxhole/crystal radio
actually uses a fair part of the collected potential to actively filter out the
other radio frequencies...
And if I am not mistaken in that, then it would seem to produce only
a specific selected frequency output signal.
Would removing the frequency filter LC circuit and using only the
sensitive germanium diodes (or rectifier) not result in the accumulation
of all available charges, instead of only those that match the selected
frequency?
In other words, would a "Tate Ambient Power Module" aka "energy from thin air"
circuit, basically a very sensitive diode rectifier with collector capacitor,
not produce more usefull potential than a crystal radio?

Regards,
Koen

I need to get some information about those receivers in order to get free energy from the air.

Yep Slayer its possible to put a transformer on that output to boost it . I understand that if you can't find a Crystal earphone (60's 70's) you can use an old telephone ear set and put a transformer  on it to hear thru the piezo tele ear piece so i guess this is enuff to put a diode and and see what it produces.

That would be good to know. How to boost that energy I mean.

hi slayer, jesus and i talked a bit about this back at the start of the thread. i had showed an aircore coil from my crystal radio in a jt circuit to demonstrate that a ferrite core was not needed. jesus thought i was powering the jt from radio waves at first. he expressed a desire to be able to light an led with a non battery powered crystal radio. the idea was mulled over and i suggested he use a led in place of the germanium diode as well as using a bifilar crystal radio coil so the voltage/current could be stepped up or down as needed. i like the idea of using the output to power a jt, i think a bifilar crystal coil would work best in this case also.
red leds and schottky diodes work well in crystal radios in place of the germanium. i can repost the crystal radio circuit with the bifilar coil if you want, the coil can be wound on an empty toilet paper roll. it works very well.

Hi @wilbynebriated

well i guess i have a few hall sencers ....  round 

last night i found a aa to cell fone charger at ramma for 2 bucks 

puts 4.5 v dc ...   works good for a supply ... 

congrats jesus ... 

getting intresting now 

ist

Thank you @ist

I thought the entire idea of the crystal radio was to use a very sensitive germanium diode
in order to utilise the extremely weak signals... And since red LEDs and schottkys tend
to need much higher voltages to work, I would expect a crystal set with them instead
of the Ge diode to be a lot less effective with weak input signals...
... but I suppose they can work if the coils transform the weak input to a higher
voltage pulse in a JT variation that merely uses the crystal set to get input.
It's a good idea to try anyway.

Still, I wonder which producs more, a fullblown crystal set circuit, or the
relatively simple "Tate Ambient Power Module" (which is in fact a simple
rectifyier using sensitive Ge diodes to catch even the smallest fluctuations).
I wonder since a crystal set is basically a Tate module with a tuned/tubeable
LC circuit attached...

Anyone?

Thank you @koen1!
I am interested on building one of those energy receivers.

really. you are correct in that germanium diodes are hard to beat for most low frequency crystal radio designs if no bias is desired, but schottky diodes will work better without bias if higher source and load impedances are achieved.
all that aside, put 10uA bias (easy to get, be clever) on a schottky and it's the clear winner by a long shot. red leds need bias and are really only ok for low freq. but hey, don't take my word for it, build one and try different diodes. expectations can easily be confirmed or dismissed this way.

I am interested on the crystal radio receiver too.

i will be posting the schemitic as soon as i can draw one up . Every time i post one there is always something backwards or missing and i have to be corrected . I will take My time this time and make sure i draw it correctly then have Nieves Look at and see if see anything that looks wrong . I am getting used to a circuit program . Building it is one thing , putting it on paper is another ..

We will be waiting for that schematic!

@jesus and gadget

Congratulation ! great work !

@all

Great thing are happening here lest not forget the power of the collective mind !
I am really proud of all of you! And for all your work and faith.
We did not get confused in 200 years old laws, but made our own laws !

Thank to all of you!

@ist

Real nice , and great picture !

This site is so busy , i cant see it , lol

Thank you @mk1 !

@all

I got one other little secret , to get this , you will need to test it to understand.

To test this , you will need a brush motor , a led , and a coil ( it can be a selenoid , i use a coil from a hair clipper , real nice about a 1000 feet 30 gage wire coil.

Ok not take the motor and connect to led , hand turn the motor, yes the led light but the motor will get harder to turn , because of the feedback to it. Not put a coil in series with the led , now the motor turns freely and led light.

Whit that coil now it is possible to run a dc motor from a cap , and keep the cap charged with the jt.

Btw , the clipper coil gives me over 120 volts ac , when i use it on my bedini.

It is a little difficult to understand. But I am looking for something to do now. I will try it.

here is a picture of the mk2 hooked up working ...

i can add the bridges ...  without effect to the unit ...

next i will hook up the crank jobbie curcuit ...

ist

Nice work!