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From: "R.Wieser" <address@is.invalid>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB controlled mains switch
Date: Mon, 20 Jan 2025 07:26:39 +0100
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Chris,

>> Also, you say USB controlled.  How do you imagine that ?  As some kind of
>> special USB device (for which it is hard to find a driver) ?
>
> As I have said previously, it's easy. E.g.
> https://www.amazon.co.uk/Control-Intelligent-Channel-Controller-Support-default/dp/B07PWPF2DT

Whohoo!  They actually did it, a hobby-level relay driven by USB.  I'm 
amazed.    And I see there are no drivers needed as long as its used with 
Win XP or 7.  I stand corrected.

> Load 'usbrelay' to control (apt-get install usbrelay')

One question though : (where and) how did you find that Linux driver ?


Wait, what ?

Under "Technical details" :

Voltage  ?5 Volts
Wattage  ?50 watts

Something is fishy there ... and I only now realize that I do not see any 
mentioning for which voltage its output is rated.  If the above is correct 
than they have rated it for 5 volts (5V x 10A = 50W), not 220 ...

Do *NOT* use stuff above its voltage rating.  The electrical track 
seperation between the (low voltage) driving electronic and (high voltage) 
output circuits might not be large enough.

Regards,
Rudy Wieser