Joule Thief

[Pirate88179]

@ IST:

I don't know how to figure it but my bet is one should light a few leds for a very long time.  I have a question for you, or anyone.  @2.7 volts can 400F kill us or harm us in any way?  I know what a Farad is but I can't equate that to amps of which 1/10 of an amp can kill.  I would like to get 2 of these units.

Bill

[Pirate88179]

@ Freezer:

Yes, I have never seen any at 1 volt....but, I was concerned that I might fry my transistor running it at 2.3 vdc with my 10F caps...then, I got the idea to charge them with an AA battery and....then they only had 1.5 volts.  So, if you wanted a 1 volt supercap, just charge it with 1 volt input somehow and that should do it. (At least from what I have observed, I am no expert on these)

Bill

[electricme]

@ Jeanna
I forgot to include you for your kind "help" a couple of posts back, thank you Jeanna.

@ Pirate,
Will a capacitor kill you, short answer is "yep", if you decide to discharge it directly **** EDITED OUT **** your heart, well have you said your prayers before you do it?
DON'T do it kiddies, it will hurt you, lots and lots.

@ ist,
well now what do we have here, a six pack of lovely capacitors, and biggies to boot, I been sitting here thinking about this ist, hmmmmmmm, and hmmmmmm, would you be thinking of making up some kind of rotary discharge and recharge system?
If one had say 10 JTs, powering separate capacitors, and each controlled by a LED driver counter chip IC, this could be done, the output of the chip switches on a separate MOSFET, this could impulse drive a big stepper motor disk, or a motor designed by yourself that has separate coils?

Is this what you are going to do ist, or have I given you an idea for another invention?  lol

@all,
I just setup another computer, and installed a BETA copy of Windows 7, looks good people, don't put it on your working everyday PC as it is knobbled on the 1st of AUGUST 2009, it will stop and you will loose anything you put on it, use a sheep dip PC.
You cant setup via "update 2 Win7" if you got XP, you will need to start off with a blank HD.


I just heard on our news, Pres. B. OBAMA (the pretender)  has taken his oath again, whats going on here with this guy? I smell a rat in coat tails with a golden tooth. Before anyone jumps down my throat, google his name, you'll see.


jim

[Tink]

@ IST:

I have a question for you, or anyone.  @2.7 volts can 400F kill us or harm us in any way?

Bill

No.
Voltage far too low.
Never connect poles the wrong way though, or it will explode,..THAT might kill you.
Oh, and don't overcharge it.

[electricme]

@all and Bill
Bill asked a question generally, it was, can 1/10 of an AMP kill you?   

This is a timely question as through out this JT thread, many of us have been jolted whilst pulling apart cameras and coming into contact with capacitors, so in the interest of forum safety, I have presented the below web site.
 
http://www.allaboutcircuits.com/vol_1/chpt_3/4.html

To Bills, question, I have answered YES, and Tink said NO, (thankyou sir), so I decided to google this question
Now I'm not saying that this web address answers YES or NO, I suggest you the reader go and see for yourself.

There are many varables involved, and it is not quite so stright forward as it may seem. 



Goodnight all

jim