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Comments:
<0> why do you use so many pins from the parallel ?
<1> because i didnt want a spurious high or something to kill my connection
<0> so ?
<0> ah
<0> you ***ert 3 pins ?
<1> yes, high-low-high is the magic combo.
<1> on pins 1-3
<0> that's a protocl. already
<0> and this uC, do you need to pre-program it ?
<1> yeah. it has flash ram for code.. 48k of space.
<0> aha
<1> crappy primative asm language
<0> funny. in russian circuitry iconography, resistors are drawn differently
<0> all other parts are the same
<1> american and japanese i think are the only who use the zig-zag resistors.
<0> ah, europeans use rectangualr resistors, too ?
<1> the rest use a rectangle i think.. i don't like the rectangle, because it can mean so many different things.
<1> yeah
<0> i though it's only russian
<1> european resistor looks like american fuse
<0> and russian don't make the small arch when wires cross
<0> they just cross at right angle, that's it
<0> when they connect, it's fat dot
<1> not everyone does that arch, but i like it.
<0> so, does your PS work with load ?
<1> yep
<1> i guess it just shuts down if theres no load, which is reasonable
<0> why, can it be harmful for the PS ?
<0> it's not shortcircuiting it, why
<1> beats me
<1> im a wuss and i don't like to play with wall/mains current. so ive been using wall warts.. but going to try using computer PS
<1> wall warts only put out a max of a few amps
<0> what's "wall warts" ?
<1> 'dc adapters' in polite speech.. those little plastic boxes that plug into the wall, with transformers and rectifiers
<0> ac/dc
<1> oh, yeah.
<1> annoying how they're usually unregulated though
<2> o/~ shook me alll night long o/~
<1> eg, if you aren't drawing much load, a 5v adapter is probably at 7 or 8v
<1> i wonder, do they have an equivilent of 'radio shack' in israel?
<0> sort of
<0> in tel-aviv
<3> this is what I used... http://img110.imageshack.us/img110/4435/lptrelay8fk.png
<3> took me a while to redraw that :/
<1> i am curious
<1> why did you use a zener diode, rather than just a normal signal diode?
<3> though as AaronWL noted, a spurious high would make that go a little nuts
<3> AaronWL: my schematic capture doesn't have a Schottky symbol
<1> well, ok, why schottky rather than signal diode?
<3> 1N5819 is a high speed Schottky diode, and since I had around a hundred of them in a pile when I built that circuit I used one
<1> ok
<3> I figured it would also save the transistor a little abuse
<1> so this circuit takes power from the same computer that operates the parport?
<3> yup
<1> because i see you didnt use the parport's ground pins
<3> for the relay coil I decided it wasn't a big deal
<3> yeah, it's referenced to internal ground anyways so it didn't need it
<3> if I wanted to get a little more complex I'd probably use an octal latch such as the 74LS573 or 74LS574 so that there would be no glitch issues
<0> Mine is same as CompHobby except it uses bipolar transistor not FET
<0> and a resistor is added at the base of transistor
<1> i was concerned about ESD .. static .. so i put small capacitors on the signal pins.
<3> you know, this gives me an idea
<3> after I finish the brain**** processor I'm designing I'm going to build a remote system reboot and power control system for the ACM lab at school
<3> because half of the ACM machines are still turned off after the powerout on Thursday... no one who is on campus right now has a key to the lab
<1> hm, at our lab, they are kept on so they can be used remotely
<3> normally they are
<3> but the powerout nailed everything, since the admins forgot to set the BIOSes to last-power-state
<3> it'd be much appreciated to be able to hard reset and/or power up/down remotely anyways, since occasionally we have a request for that
<1> yeah definitely
<1> hehe, while you're at it, give it a remote serial console.
<1> thats what i was thinking about while i was designing this, with the pic
<3> one of the other admins (who happens to be one of the people in my apartment next year) is already working on that
<3> we found a pile of old external modems and stuff, and he got some ancient DEC terminals with amber screens
<1> your school sounds a lot cooler than mine. all my acm does is talk about linux, video games, and pr0n all day
<0> what is acm ?
<1> ***ociation for computing machine, semiprestegious computer science organization
<1> the main organization is hardcore, but some of the university chapters (like mine) are pretty lame
<1> i guess its US-only, but im not sure
<0> yeah i know acm magainzed
<0> magazines
<0> so, you have like acm society at the school , and you meet and talk ?
<1> yeah
<0> i ws ieee member a some time
<0> then i stopped it
<1> sometimes have pizza.. usually a few people present stuff
<1> mostly, at mine, computer game stuff or other sillines
<3> AaronWL: we're kinda lame but we have fun stuff going on once in a while
<1> ok, this power supply is annoying.. it only has regulation on the 5v rail
<3> once in a while we have a linux installfest, the rest of the time we hang around in the lab working on stuff and messing with old dumpster dived hardware
<1> the 12v rail seems to only be regulated in terms of the 5v
<3> wow, that's kinda funky
<3> I think I'm going to start a hack-this contest at the ACM next year, not sure
<1> well, i think that is typical for a simple flyback converter or whatever
<3> gotta finish my httpd and then add some hard to find exploits
<1> but its annoying because it means i need to load the 5v rail even if i dont care to use it
<3> hm
<3> throw a 4.7ohm resistor or two on it
<1> yeah, but, hehe i have a shortage of high-wattage resistors..
<1> and radio shack is never open at convenient hours
<3> radio shack ****s these days :(
<3> the highest wattage they have is 1/2W
<3> except for the single 8ohm 10W they have or something
<4> frys > radio shack
<3> a few good sources of high wattage resistors though: computer switching PSUs, old CRT monitors
<1> hm, mine is better.. they have several different ~10w wirewound
<3> oh, wow
<1> frys is awesome.. but only in CA :(
<3> strtok, do they sell individual components or just boards and stuff like that?
<1> frys sells everything.. including books on electronics
<4> they sell rows of components
<3> wow
<4> i mean aisles
<3> now I wish I lived in california
<1> ive always wished i lived in california, when i did not :P
<3> *ebay
<1> too bad it costs $$$$ to live there
<3> hmmm
<3> sounds like just over the border in nevada might be a better idea then
<1> lots of people do that, but it ****s if you work in cali
<4> i live in mountain view
<5> hmm, how do I make /www = /usr/local/apache2/htdocs ?
<4> it's stupidly expensive
<3> zid_: ln -s /usr/local/apache2/htdocs /www
<3> you'll need to be superuser
<5> no duh
<5> I keep getting /www = htdocs/www >_<
<3> heh
<5> yours gives no such file or directory
<1> my other concern about moving back to california is they are very firearm unfriendly.
<1> well, the cops and criminals still have guns...
<3> hm, I may have switched the params
<3> true... "gun control will solve crime!" yeah right
<5> then it's what I was doing :P
<4> depends on your definition of firearm unfriendly
<1> ln real_file link
<4> there are worse states for firearms
<6> heh well, i dunno
<6> i refer to canada
<1> worse? im not sure about that.
<6> almost no handgun killings
<6> heh
<6> and there theyre outlawed
<1> well i dont care about handguns
<4> guns are not outlawed in canada
<6> then agian 1/10 of the ppl
<5> ln -s /www htdocs/ gives /www/htdocs/www >_<
<4> there are a lot of guns in canada
<6> strtok where i live atm yu cant own a handgun
<6> riffles and **** you can own
<3> rip, there are almost none in switzerland, and pretty much everyone has been in the army and has a machine gun in the closet
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