Re: USB controlled mains switch

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