----------------------------------------------------------------------------------
@MSGID: 1@dont-email.me> 5abe00a2
@REPLY: <j1giek-3ot5.ln1@esprimo.zbmc.eu>
8e0fb0d0
@INTL 3:770/1 3:770/3
@REPLYADDR tnp@invalid.invalid
@REPLYTO 3:770/3.0 UUCP
@PID: SoupGate-Win32 v1.05
On 10/04/2024 14:16, Chris Green wrote:
> Mike Scott <
usenet.16@scottsonline.org.uk.invalid> wrote:
>> Hi all. Two separate projects which will need a relay of some sort to
>> run from a Pi or similar.
>>
>> I`m really looking for something plug-and-go rather than build-your-own
>> (especially item 2 below)
>>
>> First is a dpdt relay to switch around 12-20 V at a couple of amps. spdt
>> are easy to come by; the only dpdt ones I`ve found are on aliexpress,
>> but their longevity is possibly open to question :-{
>>
> Try CPC (cpc.farnell.com), but you will probably need some sort of
> `driver` between the Pi digital output and the relay coil.
> Alternatively, as suggested here, a solid state switch or even an opto
> isolator.
>
>
>> Second is something to switch mains safely - a full 13A to run a 3kW
>> heater. I`ve drawn a blank: best I can think of is to butcher one of
>> those wireless mains switch modules, which would at least provide a good
>> isolation gap :-)
>>
> Again CPC will probably have something, but again you`ll need
> something between the Pi and the `whatever`.
>
> Are there not ready made relay modules for the Pi?
>
There are, but most are lower power and SPDT.
Which is why I built my own...
BUT although it would be a fun project, even getting hold of big solid
state relays is difficult.
--
"First, find out who are the people you can not criticise. They are your
oppressors."
- George Orwell
--- SoupGate-Win32 v1.05
* Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
SEEN-BY: 50/109 153/757 218/840 840 220/70 221/1 6
360 226/17 100 240/1120
SEEN-BY: 267/800 301/1 113 812 310/31 335/364
341/66 463/68 467/888 633/280
SEEN-BY: 712/848 770/1 3 100 330 340 772/210 220
230 3634/12 5005/49 5019/40
SEEN-BY: 5020/715 848 1042 4441 12000 5030/49 722
1081 1474 5054/8 5058/104
SEEN-BY: 5061/133 5075/128
@PATH: 770/3 1 218/840 221/6 301/1 5020/1042 4441