Joule Thief

[dasimpson]

anyway i was searching the internet for a solar light sensing circuit so my night lights can turn on when the sun goes down but automaticly turn off when the sun comes up and charge the batterys i have had to move to 2.4vdc can not quite seem to get it rolling with 1.5vdc if anyone could let me know and help would be much apreacited btw the output goes to a joule thief

here is the circuit diagram

[dasimpson]

the one above is the low ampage one this one a 2 tranisitor model is the higher ampage version

[the_big_m_in_ok]

after what happened to my files aka the hacker deleting things i keep copys on things not connected to my pc ...

That's a good idea, but as long as you add data from the Internet, the disks you introduce to your system may have a virus on them.
Take a look at:
http://en.wikipedia.org/wiki/BIOS

EEPROM chips are vulnerable to viruses, but the older DOS PROM DIP-style of hardware IC's was impossible to change, since the boot program was hardwired into the chip.

Leaving all outside disks off your computer's hard drive should help some and disabling the Internet firmware should also help more.

... resently just starting makeing a book also for the info you never know they maybe a time they is no power the eletronic data ant much use then

Very good idea.  You might want to organize your information into categories for easy access.  A paper with a schematic drawing should be virus-proof.

now i do have a good memory but things i dont seem to do for a long time to tend to go missing in my memory like playing guitar i did it for 10 years recenty picked up up after about 11 or 12 years and well couldent ethern remeber how to make a cord lol this also seems to have happened with other data maybe this is down to my bike accident i ant sure just know that stuff i dont do for as long time seams to slip

I'm 60, myself.  I know what you mean.  "Senior moment."                     

--Lee

[WilbyInebriated]

this 'computer' security issue comes up alot, this isn't the first time i have posted this link and surely will not be the last...

firewalls, AV software, etc. are a waste of CPU cycles. if you want to make it simple and easy then stop 'enumerating the badness'... it puts you in an endless arms race against the hackers/virii writers, a race you most likely will not win...

10 GOSUB LOOK_FOR_HOLES
20 IF HOLE_FOUND = FALSE THEN GOTO 50
30 GOSUB FIX_HOLE
40 GOTO 10
50 GOSUB CONGRATULATE_SELF
60 GOSUB GET_HACKED_EVENTUALLY_ANYWAY
70 GOTO 10 

the six DUMBEST IDEAS in computer security:
1: default permit (allow all access)... this is stupid, if you can't see why, consider not having a computer.
2: enumerating the badness... also stupid, far more reasonable to enumerate the goodness.
3: penetrate and patch... also known as 'turd polishing'. if this worked, we would have run out of browser security bugs by now.
4: hacking is cool... another stupid idea. what's cool? good engineering is cool.
5: educating users... if this is your plan, plan to 'patch' your users every week or so.
6: action is better than inaction... more stupid. for it is often easier to not do something dumb than it is to do something smart.

the minor dumbs:
    * "we're not a target" - yes, you are. worms aren't smart enough to realize that your web site/home network isn't interesting.
    * "everyone would be secure if they all just ran <security-flavor-of-the-month>" - no, they wouldn't. operating systems have security problems because they are complex and system administration is not a solved problem in computing. until someone manages to solve system administration, switching to the flavor-of-the-month is going to be more damaging because you're making it harder for your system administrators to gain a level of expertise that only comes with time.
    * "we don't need a firewall, we have good host security" - no, you don't. If your network fabric is untrustworthy every single application that goes across the network is potentially a target. 3 words: domain naming system.
    * "we don't need host security, we have a good firewall" - no, you don't. If your firewall lets traffic through to hosts behind it, then you need to worry about the host security of those systems.
    * "let's go production with it now and we can secure it later" - no, you won't. a better question to ask yourself is "If we don't have time to do it correctly now, will we have time to do it over once it's broken?" sometimes, building a system that is in constant need of repair means you will spend years investing in turd polish because you were unwilling to spend days getting the job done right in the first place.
    * "we can't stop the occasional problem" - yes, you can. would you travel on commercial airliners if you thought that the aviation industry took this approach with your life? I didn't think so.


see this article: http://www.ranum.com/security/computer_security/editorials/dumb/
don't forget to read richard feynman's "personal observations on the reliability of the space shuttle"! follow the link to it via the ranum.com article...


as an aside, USB drives DO NOT function the same as a hard drive. USB drives don't have moving parts and cannot handle the amount of read/write cycles a hard disk drive can... this is why computers still have hard disk drives instead of flash memory, and why they will continue to have hard disk drives...

[altrez]

@all

Did you know that the fields around the JT can cause the illusion of over unity? But why is this... RF? Ten thousand dollars worth of tests could be wrong......

-Altrez

p.s working on a patent more to come hopefully sooner then later.