M
Meindert Sprang
Maybe he needs to reboot because the computer gets locked up, in which case
he would need an "outside line".
Then maybe he needs to run an OS that does not need rebooting.....
Meindert
Maybe he needs to reboot because the computer gets locked up, in which case
he would need an "outside line".
This one ? http://www.alquaida.org/ Sorry, no circuit found.I think al Qaida has details on how to do this posted on their website.
Hello,
Since a few weeks I am running a webcamserver . It is stationed 40
Kilometers away. I control it via an UltraVNC connection. However, about 2
times a week I need to hard-reset the computer manually.
I am looking for some kind of construction to reset the computer via a GSM
cellular phone.
The only thing I need is a relay that I can switch by making a call to the
GSM phone. So, I need only 1 channel.
This relay could switch the reset-button.
Meindert said:Then maybe he needs to run an OS that does not need rebooting.....
Meindert
If it's locking up, the printer port makes even more sense. Output a
pulse at a regular interval. If it stops, your controller resets the
computer. A simple missing pulse detector and a little thought will
show you how it works. Think of it as an external watchdog timer.
You've never used Windows ?
I wouldn't want a computer that rebooted every time it's telephone number
rang,
Michael A. Terrell said:Even the old OS in ROM computers needed rebooted at times. The only
computer that never needs to be rebooted has already been tossed into
the pile to be recycled.
Meindert said:Mmmm..... my linux server hasn't been rebooted for over a year.....Still
running.
Meindert
Michael A. Terrell said:That's no where close to "NEVER" is it? At some point a hard drive
will fail, or you'll want to add some memory, or even power it down to
clean the dust out of it.
Meindert said:But I don't think the OP needed to remotely reboot once a month because of a
hardware failure or dust job, don't you think?
Meindert
GSM phone. So, I need only 1 channel.
This relay could switch the reset-button.
However, I accept that it is sometimes necessary to hard reboot a
machine far far away, and the peace of mind and sense of power simply
being able to do it brings. However as others have stated, using a phone
is open to abuse - I for one would get a sick satisfaction from phoning
your computer to reboot it every 5 minutes. Also bear in mind that
whatever phone you are using, you can GUARANTEE that some chap will
phone your computers mobile several times a day to sell you cheap double
glazing or save you money on your energy bills. do you really want that?
However, if you do decide to go ahead with it, and you may be thinking
what im thinking here, I suggest that you connect the relay to the reset
switch and NOT the power line, reason being that the second option can
cause far more data loss and even trash your hard disk beyond useability
(ive had it happen to me during repeated brownouts - I have a ups now)
another method that springs to mind however, is to have a fully
automated "watchdog device" a watchdog card will normally set you back a
few hundred bucks/lira/quid (delete as appropriate) and works by
monitoring your computer for lockups, and rebooting if one occurs. A
cheaper alternative is to build a circuit with a monostable timer, which
can be reset if it recieves a periodic signal. IE, get some software
which sends one of the pins on the parallel port high for a second or so
every 4 minutes, and if the circuit doesnt recieve this signal to reset
itself every 5 minutes, it triggers the relay and resets the computer
(does that make sense?)
jasen said:I've had machines lock up in such a way that the red button could not shake
them out of it and they needed to be power cycled.
Michael said:What the hell is "The red button"?
EsDee wrote:
Ask yourself how many wrong numbers you get per week. Ask yourself
whether you really want your computer reset everytime someone misdials
the number of the pizza-parlor. Ask yourself whether you really want
everybody on the planet to be able to reset your computer at will.
Including everybody on usenet, once someone finds out the number you
assigned to this and posts it here.
I'm sorry, but no functional computer needs to be reset twice a week.
Hitting reset everytime your computer hangs is like buying a new car
everytime the old one runs out of gas. It is the desperate attempt to
avoid solving a problem.
If your computer hangs that often, then your setup is broken -- either
in hardware or in software. Fixing it will not only save you money in
the long run (no need to keep a GSM) but will probably teach you a
bunch of things. Some of which might even come in handy in the future.
cordially
Y.T.
Mark said:You have never heard of "the big red button" the one with "panic" etched
into it?
Michael A. Terrell said:Why not use the printer port and just issue the right command to pull
the reset line low with a DIP or reed relay?
Michael said:Not on a computer. On the other hand, I work with well designed
equipment that doesn't need a panic button.