Computer Controlled Router Monitor (switch) - Electronic Circuits Projects Diagrams Free

dannix · 16th July 2007, 05:02 PM

Hi,

I have been digging about and I'm trying to build a Computer controlled (via serial port) switch to cold boot my router should it fail to respond to ping.

Im no guru at all, I can solder with no problems but I want to make sure this is safe so need expert help

(thats you)

It is a windows Server 2003 computer (consider it XP if you like) unless someone has already done this I will sort out the programming / ping monitor stuff when this switch actually works.

can be supplyed from the ATX molex if you like. Simple as possible would be nice.

The switch must remain ON / closed if the power fails to the monitor thing, ie if its fed from the ATX supply and the server goes down, dont want the router following it.

Thanks in advance for any help you may provide!

**3v0** · 16th July 2007, 05:34 PM

How about this.

Use a RS232 flow control signal that you can toggle on the PC. Maybe RTS.

Use that signal to switch a transistor.

Have that transistor switch a relay.

The following circuit is more complex but it shows what transistor and discretes are needed to drive a relay from RS232.
A Hardware watchdog and shutdown button

dannix · 16th July 2007, 07:21 PM

Hi, thanks for your reply. That link never seems to load...

Does it work for you??

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16th July 2007, 05:02 PM	(permalink)
dannix	Computer Controlled Router Monitor (switch) Hi, I have been digging about and I'm trying to build a Computer controlled (via serial port) switch to cold boot my router should it fail to respond to ping. Im no guru at all, I can solder with no problems but I want to make sure this is safe so need expert help (thats you) It is a windows Server 2003 computer (consider it XP if you like) unless someone has already done this I will sort out the programming / ping monitor stuff when this switch actually works. can be supplyed from the ATX molex if you like. Simple as possible would be nice. The switch must remain ON / closed if the power fails to the monitor thing, ie if its fed from the ATX supply and the server goes down, dont want the router following it. Thanks in advance for any help you may provide!

16th July 2007, 05:34 PM	(permalink)
3v0	How about this. Use a RS232 flow control signal that you can toggle on the PC. Maybe RTS. Use that signal to switch a transistor. Have that transistor switch a relay. The following circuit is more complex but it shows what transistor and discretes are needed to drive a relay from RS232. A Hardware watchdog and shutdown button __________________ search engine for electronic parts Junebug USB PIC programmer kit., USB Bit Wacker, Homepage The 15 Minute Printed Circuit Board! (+drill time)

16th July 2007, 07:21 PM	(permalink)
dannix	Hi, thanks for your reply. That link never seems to load... Does it work for you??