Ahh. I didn't click on the link. The picture says 24VDC

wombat, you might want to do something like me, I actually am wondering if its possible to request a reboot from an arduino.

Now, cause I am going to start a small dedicated server company, possibly shared too, I know that these servers can NOT fail. That is why I have been researching for a while now, complete network controlled strip, DIY UPS interfaced to a generator, it'll be pretty awesome. The area where I want to host the servers is known to have power outages often, hence the reason for the generator. Plus running the fibro lines to the area is going to be expensive.

I don't think its best to just cut power lol. Windows hates it when you do that, and a reboot if possible would be MUCH softer

What kind of server are you running? If its UNIX then I think we can work together on this

 

The 24VDC, 2A is Contact rating, not coil...

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Mike2545

 

Iflymyhelishigh: I'm running a Linux server on an old HP Pavilion I found on the curb. :-) As to requesting a reboot from an Arduino, I'm intending that the Arduino should only be responsible for restarting the server if the computer has frozen and is unresponsive, in which case you would have to powercycle the PC anyway. Since I'm not running a commercial server just an at-home internet sharing setup, and since my cats don't use the internet, I only have one client: my wife.

At this point in the design process I don't have a circuit diagram, but as soon as I figure out what relay to use I'll be just about ready to wire the thing up. If you're interested in a collaboration you can email me at mightywombat @ gmail.com

 

regardless of the coil voltage, I don't think 2A is a suitable rating for powering "servers" or anything with a decent sized SMPS power supply ... the inrush current to charge up those hungry capacitors is quite high, even though the constant operating current might be low

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JustDIY: That's what I'm concerned about, but I'm having a little trouble finding a relay, normally closed, that can A) handle the current requirement and B) doesn't cost $6+ each. The ones I'm finding will require a driver circuit as well, which adds a little bit of additional price to the already more expensive relays. I'm just trying to keep my cost down, since I'm building this to save money over buying a commercial unit.

 

Is 6 Amps enough? 5VDC PC RELAY, SPDT, 6A | AllElectronics.com

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Mike2545

 

Why not use a tiny reed signal relay on the reset button connectors on your Linux box?

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or an optoisolator for that matter ... a transistor output isolator could "close" the switch when triggered

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You guys aren't getting the point of the project. I want to be able to individually address each outlet on the device in order for the server to reboot its own peripherals. I'm not sure at the moment how much power my server draws, especially at startup, but I'm pretty sure that it will be the highest power draw on the device. The relay needs to be able to handle any kind of current that could come across a household outlet. I would prefer to not have to spend $500 on 20 amp SSR's to make this project happen, but I'm beginning to see why commercially produced versions of these are so goddamn expensive. The deciding factor on this project is going to be whether I can find a way to switch AC power with a microcontroller for a couple bucks a piece.

Can you run a handful of relays in parallel in order to reduce the current across each one?

 

You could use a 5 volt relay to switch a 120vac relay that will handle 15+amps...Kind of a round about way of doing it but it would work and cheaper than $500.

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Mike2545

 

An AC relay with a driver circuit is certainly not out of the question. I'll have to look into the prices on those and see what kind of hackup I can arrange.

 

Mouser has panasonic relays rated 20A at 250V with 80A inrush for less than $6 each, with a 5 volt coil

part number:
JM1AN-TMP-DC5V

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want to contact me directly? gmail gordonthree
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Favorite numbers:
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Once you get into 12V coil relays, the price is $1.35 for 40A SPDT at AllElectronics. It would seem that a 12V relay driver could be on the same board as your relays.

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