Subj : Re: USB controlled mains switch
To   : All
From : The Natural Philosopher
Date : Mon Jan 20 2025 09:04:55

On 20/01/2025 07:41, mm0fmf wrote:
> On 20/01/2025 06:26, R.Wieser wrote:
>> Do*NOT*  use stuff above its voltage rating.
>
> Look at the damn pictures of the relays, you can see the ratings and the
> model number used.
>
> SR-05VDC-SL-C
>
>      5V DC SONGLE Power Relay SRD-05VDC-SL-C  (5 Pin mit NC / NO)
>      Contact form: 1a, 1b, 1c
>      Rated load: 10A 250VAC/28VDC,10A 125VAC/28VDC,10A 125VAC/28VDC
>      Contact resistance: <= 100 mOhm
>      Electrical life: 100,000
>      Mechanical life: 10,000,000
>      Coil rated voltage: 3-48VDC
>      Coil power: 0.36W, 0.45W
>      Coil pick-up voltage: <= 75%
>      Coil drop-out voltage: >=10%
>      Ambient temperature: -25 degrees Celsius to +70 degrees Celsius
>      Coil and contacts:1500VAC/min
>      Contact and contacts: 1000VAC/min
>      Insulation resistance: >=100M (ohm)
>
> https://www.play-zone.ch/de/5v-dc-power-relay-songle-srd-5vdc-sl-c.html
>
I'm using these (relays) to control my central heating from a Pi Zero.
They are OK

Driving a relay via a transistor is very simple and the code is minimal

--
No Apple devices were knowingly used in the preparation of this post.

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