Joule Thief

[electricme]

@all
This is the second part of my TinyWinyVideo of my small electric motor running from my earth powered batt capacitor.
For those interrested, the motor I took out of one of those electric powered remote contrilled helecopters, I believe there is a tiny rechargable cell in them also.

This motor ran for about 7 minutes all up, at 1/3 of 1.0 volts.

Click on the PaperClipp BELOW the video icon to watch the motor running

[electricme]

@All
Gary brings up an important point here, and I have noticed others have mentioned this in passing.

I do think that   at  when we start using higher power we should   start monitoring the  RF noise  that  a JT can  make .
for the larger ones it might make sense to keep them below  radio  frequency .......so  we  don't get the FCC knocking  on  our doors .
gary

If you don't want the FCC in your country on your doorstep then build a large faraday cage about the size of a chook pen (hen that lay eggs pen).
Make the frame out of wood, then cover all 6 sides with a woven metal mesh, say fly wire, insect wire, then earth every side.
Don't forget a door.
If you carn't get woven mesh, use alfoil, the stuff used for baking yummies to eat.

@Bill,
Would you be able to conduct a test using some of your PI gear to see if the JT is sending out any RFI?
Thanks

jim

[TheNOP]

@theNOP
I think you may have meant to say, an Alternating Current is nothing more than a Direct Current in which the "direction" of current flow alternates. That is, the Direct Current flows in one direction and then in the next instant reverses it's direction--- it Alternates. As well it should be noted that physics has proven long ago that the electrons in a conductor move at a snails pace and have little to do with the actual transfer of energy in electrical systems,the energy is in the associated electric and magnetic "fields".

what is the fact that electrons move slowly got to do with the fact that the current flow alternates ?

since the electrons are said to go from a positive to a negative pole, or is it the holes ?, does not matter, whats matter is the fact they move.
if they move, they can move in either direction regardless of their speed, no ?
the polarity changes is what make the current alternate.

[electricme]

@ Allcanadian,
Thats right, same thing for 240v AC at 50Hz people like me.

@theNOP
I think you may have meant to say, an Alternating Current is nothing more than a Direct Current in which the "direction" of current flow alternates. That is, the Direct Current flows in one direction and then in the next instant reverses it's direction--- it Alternates. As well it should be noted that physics has proven long ago that the electrons in a conductor move at a snails pace and have little to do with the actual transfer of energy in electrical systems,the energy is in the associated electric and magnetic "fields".

@All
I think we should also understand how this is relates to measurement on our oscilloscopes. A sinusoidal wave (AC) such as domestic power 120v@60Hz will show a rise above zero volts to 120v then back to zero,then below zero volts to negative 120v then back to zero volts. But it should be understood that this is not a "negative" potential voltage, the portion below the zero volts line is where the current has alternated---it has reversed direction because the polarity of the source has reversed. What some call a "negative" voltage is in fact a reversal of voltage polarity which is always relative to the "zero" line(center horizontal line). Our oscilloscopes essentially measure a potential difference or voltage and polarity between two points in a known period of time. This gives us no indication of instantaneous power because power in Watts is volts times "amps". We can test this process by connecting our oscilloscope probes to a battery, note the voltage relative to the zero volts line, then reverse the probes on the battery and note the voltage relative to the zero volts line.
Best Regards
AC

If two Batteries are connected together with a Neg to Pos connection together, their 3 outputs are generally refered to as (+) (0) (-)  Many IC circuits require such a voltage configuration.

For instance, the following voltage regulators LM2805 (5volt +) and the LM2905 (5volt -) are designed for this purpose.
These are called DUAL voltage circuits.

jim

Photo 0823.JPG
In the JPG below, The top battery terminal is (+) 9 volts
The centertap is the 0 volt point
The Bottom terminal is the (-) 9 volts


For IST
Would these 4 microwave 12KV diodes be what you were referring to?
0822.jpg
I have 8 more of them, but they are square ones
HVR-062 and 2X062h

jim

[altrez]

@all

Ok question. I have a small ceramic cap hooked up in this way:

From the positive side of my diode bridge I have one leg of a small 0.1uF 50WVDC cap on the other leg of the cap I have the positive hook up of my battery. From the negative side of my battery I have it hoked up into the negative side of the diode bridge.

Is that correct? And how will that work exactly? what if I hooked up a 16v electrolytic cap in parallel with the diode bride and then added the battery behind that? would the cap fill up to 35 volts then dumb that charge into the battery?

And how would I set that up? Would I take the + from bridge to + on electrolytic the - form electrolytic to positive on battery? then from the negative on the battery go to the negative on the bridge?

Thank you all so much. I am weak when it comes to caps.

-Altrez