Here is how I might do it.
When there is no power on the USB port the timer will start oscillating. 1 second on / 10 seconds off.
Power supply is from a wall wart. Exact voltage dictated by the relay K1 coil. Call it 5VDC to 15VDC.
You could build this simpler, but be careful. I don't see a way of doing this without some time delay somewhere.
You might be able to get by with the relay "pressing" the on switch if the USB port is down.
Just diconect the power button header from the motherbored and activate a lock screen. if you run windows server this is default anyway when you have to press Ctrl Alt DEL to login. however it could still me turned off at the wall
maybe in a industrial or commercial setting. But when im making one maybe two its more of a pain to make it smallestCircuit boards can be made quite small. Much smaller than trying to build something out of discreete components.
Well, the problem is mostly shoddy power and less parents. Our power will flicker for 10-15 secs or just shut off and return back a few minutes later. The circuit will make sure it comes right back on when it can.hi,
what is the use of the server to you,
are you saving any data on it / its doing any financial transaction (Sale/Purchase)
or for the backup ?
continuasly shutting down and restating the PC/server will destroy your HDD and RAM even it can destroy your MOTHER BOARD and the CPU ;even if you put any timer ckt. (with NE555/CD4060 ) or even replacing your main's socket switch normal with the 2 way switch (as even any one closes from the mains switch it will be in ON state)
Very inventive solution...this with a black screensaver and the circuit completely solves the problem. All I have to do is put a disable somewhere out of sight/ hiddenJust diconect the power button header from the motherbored and activate a lock screen. if you run windows server this is default anyway when you have to press Ctrl Alt DEL to login. however it could still me turned off at the wall
It's the easiest and best way to make one or two. You can get proto boards that simplify the process. It's much easier than just trying to soldier a bunch of leads together or trying to build timers from discreete components, which is sure to end in disaster, and can be made much smaller. Take it form someone who has done this for 30 years. I know what I'm talking about.Kool1zero said:maybe in a industrial or commercial setting. But when im making one maybe two its more of a pain to make it smallest
that's easily enough covered with a batch in the startup folder.by the way tel me one thing after the restart of your PC/SERVER don't you have to start your application (may be SQL Server).
It doesn't really matter if your math is right or wrong, what matters is getting a circuit that will work. What is going to drive your realy. All the calculations in the world are irrelevant uless you've thought about the circuit details.Kool1zero said:right? or am i doing my math wrong?
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by Steve Arar
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