From: cl@isbd.net   
      
   Adrian  wrote:   
   > I'm looking for a USB controlled mains switch (230V AC) that I can   
   > connect to a PI to turn a mains power supply on and off.   
   >   
   > I've done a bit of digging around on the net, and the options seem to   
   > fall into two categories, either a relay device which means having to   
   > rewire the device (which I'd rather avoid), priced around 30Euros or one   
   > that sits in line (between the device and the supply).  The latter   
   > appears to be in excess of 100Euros, which is considerably more than I   
   > want to pay.   
   >   
   I don't understand the difference. Surely anything that's going to   
   turn something on/off needs to be "one that sits in line (between the   
   device and the supply)" doesn't it?   
      
   Do you mean (the ones that cost 100 Euros or more) something that   
   already has a mains plug and socket on it?  I think they're going to   
   be expensive simply because they aren't much in demand.  What 'the   
   world' wants is a WiFi connected switch and they're two a penny of   
   course.   
      
      
   > Any suggestions on where to look ?  I'm not interested in a wireless   
   > solution, as it is likely to be used in places where signals are not   
   > reliable.   
   >   
   I think you'll probably have to bite the bullet and get a relay board   
   of some sort. Does it **have** to be USB?  There's lots of quite neat   
   relay hats for the Pi.   
      
   --   
   Chris Green   
   ·   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)