INTL 3:770/1 3:770/3
REPLYADDR tnp@invalid.invalid
REPLYTO 3:770/3.0 UUCP
MSGID:  9ee53960
REPLY: <6pru5l-oju1.ln1@q957.zbmc.eu> d698df05
PID: SoupGate-Win32 v1.05
On 19/01/2025 09:04, Chris Green wrote:
> 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.
>

They aren't especially able to handle 230V at sane currents.

I made my own board up.  Featuring onboard PSU and mains chokes and
filers and a fuse, a 13A capable relay and a pi PICO. Also has an
optional temperature sensor hooked up to the ADC

Can send you the Gerbers if interested


--
If you tell a lie big enough and keep repeating it, people will
eventually come to believe it. The lie can be maintained only for such
time as the State can shield the people from the political, economic
and/or military consequences of the lie. It thus becomes vitally
important for the State to use all of its powers to repress dissent, for
the truth is the mortal enemy of the lie, and thus by extension, the
truth is the greatest enemy of the State.

Joseph Goebbels

--- SoupGate-Win32 v1.05
 * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
SEEN-BY: 4/0 19/10 88/0 90/0 105/81 106/201 128/187 129/305 153/757
SEEN-BY: 153/7715 154/110 218/700 840 220/70 221/1 6 360 226/17 30
SEEN-BY: 226/100 227/114 229/110 111 114 200 206 300 317 400 426 428
SEEN-BY: 229/470 550 616 664 700 705 266/512 267/800 291/111 292/854
SEEN-BY: 301/1 310/31 320/219 322/757 335/364 341/66 342/200 396/45
SEEN-BY: 460/58 633/280 712/848 770/1 3 100 330 340 772/210 220 230
SEEN-BY: 880/1 900/0 102 106 902/0 19 26 905/0 930/1 2320/105 5020/400
SEEN-BY: 5075/35
PATH: 770/3 1 218/840 221/6 341/66 902/26 229/426