Build pc-powerswitch over 433MHz

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I would like to be able to power up/down my PC remotely.
For this I would like to use a 433MHz momentary switch (or relay), that simulates pressing down the powerbutton.
My idea (i’ve got NO experience with electronics) is to build something like this:

using this or this.

My question:

• Is something like this possible, or will I fry my PC with it (or will it not work at all)?

I’m not sure about the voltages on modern pc mainboards, but I could image that it is possible to damage something if you put 5 volts on the contact. In this case I would use the 5 volts to switch on and off a relay. Instead of the direct connection you put the relay in parallel to the powerbutton. Something like this maybe (just an example):
433MHz Codec-Adaptive Wireless Relay

@flybysun

maybe try it with a relais that’s “shorting” the red and black wire, since the pwr button does nothing else.
or if you’re able to upload a sketch to the above device, you could “trigger” the red wire via any of the digital outs. but that’s only a suggestion, no idea if this works at all …
i personally would get the VDD from another source than this wire. don’t know how the device reacts when pressing the button manually.

could be a job for @sweebee or @oitzu or @Yves911. maybe they could have a clue on this.

You have to measure the voltage of the powerbutton. Could be 5V or 12V. But with a relay your always safe.

What kind of 433mhz transceiver do you use? Your eBay links aren’t working.

An other option is using wake on lan on your pc. Much easier

Why not using wake on lan for that?

@sweebee, @p4co86

An other option is using wake on lan on your pc. Much easier

With WOL you cannot shut down your PC (or did I miss anything?)

its kind of double post, but to yes Wake-On-Lan should be the best for your project! no hardware, just simple software steps.

The only scenario you can’t use WOL if your mainboard/networkcard isnt able to WOL or if you computer is not connected to the internet. I doubt thats the fact

Read this thread for instructions how to WOL.

http://lifehacker.com/5275652/shut-down-your-windows-pc-remotely-from-linux

@p4co86
Did not know that… useful!

Now the only problem is that my motherboard does not support WOL

@sweebee
this one: http://www.ebay.com/itm/280932608891
or this one: http://www.ebay.com/itm/281407880577

But I think you are right in that a relais is safer than a switch.
But i cannot seem to be able to find the relay I want

• 5v (so it can be powered from USB)
• 433 Mhz superheterodyne

This relay?: http://www.ebay.com/itm/5V-One-1-Channel-Relay-Module-Board-Shield-For-PIC-AVR-DSP-ARM-MCU-Arduino-/310566336050?pt=LH_DefaultDomain_0&hash=item484f323632

I don’t have experience with the programmable 433mhz receiver. but an arduino pro mini and a superheterodyne should work.

@sweebee said:

This relay?: http://www.ebay.com/itm/310566336050

That would probably work, but I would then (as you said) also need a 433MHz receiver ans something to teach/control it with…

I would rather buy a relay with an integrated 433MHz superheterodyne receiver… Problem is that I can only find them in 12V-versions.

So I’m looking for something like this

But then in a 5V version… anyone?

ebay couldn’t fulfill my needs, but this product on aliexpress looks promising.

It looks like it meets all my requirements:

• 433 MHz
• momentary switching
• learning capabilities
• superheterodyne
• 5V

My setup would look something like this:

What do you think, would this work?

You should use a relay.
Do you know that the power switch works with 5v? I don’t know this. The safe way is to set a relay between your receiver and the power button.

@Icesory
I thought the item above was a relay (sorry, I’m an electro-n00b). Is it a switch then?

No it is a simple transistor switch. By an signal the output is set to 5v.

@Icesory
no luck on ebay. last try… is this what would work for me?

This looks good.

@Icesory
thanks… ordered… now we wait for 4-6 weeks