Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: The Natural Philosopher <tnp@invalid.invalid>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB controlled mains switch
Date: Sun, 19 Jan 2025 13:04:34 +0000
Organization: A little, after lunch
Lines: 32
Message-ID: <vmit92$2719a$9@dont-email.me>
References: <TjgqpoLGRDjnFwvW@ku.gro.lloiff>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Sun, 19 Jan 2025 14:04:35 +0100 (CET)
Injection-Info: dont-email.me; posting-host="3b24013de1d74da0f1eb7d95525187f1";
	logging-data="2327850"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+hOqJcUibqKkat49p9QMvD+j8VvaEYqzo="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:4PQebPCGmTlo1qTnmeJNkWU5KgE=
Content-Language: en-GB
In-Reply-To: <TjgqpoLGRDjnFwvW@ku.gro.lloiff>
Bytes: 2186

On 18/01/2025 23:07, 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.
> 
> 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.
> 
> Thanks
> 
> Adrian

Pi Pico, transistor buffer and a big fat mains relay, plus code.
You can talk down the same USB you use to power it.

Less work and more cost - use a Pi with more USB onboard



-- 
"Socialist governments traditionally do make a financial mess. They 
always run out of other people's money. It's quite a characteristic of them"

Margaret Thatcher