I see no reason that one could not tap into the LCD display lines using a decoder that will only trigger when a certain callback number is displayed.
Was never an expert at Digital system design, but I assume it would go something like this: Call the pager send 8888888888 as the call back number (all LCD segements lit). Tie each LCD segments to an AND gate, that when the output is high will trip a relay. Any electrical engineers or digital systems guys on the list care to comment as this is far from my area of expertise. -- Chris Allermann - <[EMAIL PROTECTED]> On Thu, 2003-11-13 at 11:23, [EMAIL PROTECTED] wrote: > Yes - that's why ghetto-rigged is not a good idea. > > To do it proper, you need to buy flex/reflex chips (motorola over-the-air > paging protocol), and design your own circuit boards/etc. Not cheap. I > haven't seen 'pager as a module' for flex/reflex, but i did see POCSAG > modules (which interface to serial port). POCSAG is older-style broadcast > paging protocol, and you may have troubles finding service provider. > > Just search for pocsag and you'll find lots of hardware and software to > work with it. (hamcom is the standard hardware interface). > > > > On Thu, 13 Nov 2003, Jacob Farkas wrote: > > > Sounds like a neat idea. > > > > Here is a practical question to ponder. > > > > What if someone dials the number by accident, or you get a pager or cell > > phone with a recycled number, etc. your device may reset itself more than > > you would bargain for. > > > > Just a thought, > > Jacob > > > > > > > > On 11/13/03 3:34 AM, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> > > wrote: > > > > > If you don't mind a ghetto jury-rig, it can be done for about $5 with a > > > few parts > > > bought at Radio Shack and you don't have to open up your radio receiver. > > > > > > Here's an example of how to rig your pager or phone to reset your PC: > > > Buy a phototransistor from radio shack ($1.50) and some black electrical > > > tape ($1.50?) > > > > > > 1) disconnect the wires from the "reset" button on the PC, and solder it > > > to the phototransistor. > > > 2) tape the phototransistor so the detector faces the pager or mobile > > > phone LCD. Tape it up > > > real well so that no stray light leaks through. > > > > > > Activating your pager or cellphone (via incoming call or txt msg) will > > > trigger the backlight on > > > the LCD which will, in turn, cause the phototransistor to pass current. > > > > > > With a few more parts (surge protected power strip, relay, perfboard, > > > project box?) > > > you could apply the same concept to temporarily interrupt power to your > > > devices. > > > > > > Haudy Kazemi wrote: > > > > > >> Try searching for 'watchdog timers' or 'dead man switches' that can > > >> automatically reset a PC or access point if it stops responding. There are > > >> some pre-built devices that can do this, or you could build your own. I'm > > >> trying to come up with the latter... > > >> > > >> At 12:32 AM 11/13/2003 -0500, Anthony Townsend wrote: > > >> > > >> > > >>> I'm looking for any references/info on projects or products that employ > > >>> the paging network for remote control of unattended devices. > > >>> > > >>> I'm interested in building a simple switch to power cycle remote > > >>> wireless nodes. There is a product on the market for $375 > > >>> [http://www.nighthawksystems.com/nighthawk_nh2.asp] but it also seems > > >>> like one could build such a device rather easily with a pager, a relay, > > >>> and some minor soldering by hooking up the vibrate motor to the relay > > >>> input. > > >>> > > >>> This got me thinking, though that there might be a lot of cool things > > >>> that can be done remotely with pagers & unattended devices. Google is > > >>> not producing much, but maybe I'm not using the right terms. > > >>> > > >>> Please reply off-list, I'll compile and post anything I find. > > >>> > > >>> thanks in advance > > >>> > > >>> -- > > >>> NYCwireless - http://www.nycwireless.net/ > > >>> Un/Subscribe: http://lists.nycwireless.net/mailman/listinfo/nycwireless/ > > >>> Archives: http://lists.nycwireless.net/pipermail/nycwireless/ > > >>> > > >>> > > >>> > > >>> > > >> > > >> "If you're reading this, read it again." > > >> -- > > >> NYCwireless - http://www.nycwireless.net/ > > >> Un/Subscribe: http://lists.nycwireless.net/mailman/listinfo/nycwireless/ > > >> Archives: http://lists.nycwireless.net/pipermail/nycwireless/ > > >> > > >> > > >> > > > > > > -- > > > NYCwireless - http://www.nycwireless.net/ > > > Un/Subscribe: http://lists.nycwireless.net/mailman/listinfo/nycwireless/ > > > Archives: http://lists.nycwireless.net/pipermail/nycwireless/ > > > > > > > -- > > NYCwireless - http://www.nycwireless.net/ > > Un/Subscribe: http://lists.nycwireless.net/mailman/listinfo/nycwireless/ > > Archives: http://lists.nycwireless.net/pipermail/nycwireless/ > > > > -- > NYCwireless - http://www.nycwireless.net/ > Un/Subscribe: http://lists.nycwireless.net/mailman/listinfo/nycwireless/ > Archives: http://lists.nycwireless.net/pipermail/nycwireless/ > > -- NYCwireless - http://www.nycwireless.net/ Un/Subscribe: http://lists.nycwireless.net/mailman/listinfo/nycwireless/ Archives: http://lists.nycwireless.net/pipermail/nycwireless/
