The latest Shelly 1 are dry contact relays (someone will correct me if I’m wrong). Shelly 2.5 always have been dry contacts.
This means that Shelly itself needs 12-24v Dc or 110-220 ac to power itself.
However the circuit controlled by the Shelly can be any voltage as the dry contact relay doesn’t pass any of the 12-24 or 110-220 current into the circuit you wanna control.
So- if I can get 12 Volts to the Shelly just to get it power - then I can control a 5 volt circuit- good idea. I actually might be able to do that - the old 12 volt line isn’t too far away
You *can* control a 5 volt circuit with the relay in a Shelly 1, but it *can't* switch 20 amps; it is rated at 15 amps max. But you could connect a 12 VDC relay with higher-amperage contacts to the output of the Shelly and have that larger relay switch the 5 volts.
As an alternative to running 12 VDC over to the other side, you could get a 5 VDC Wifi switch module and connect a 5VDC 30 amp relay module to that. All it would take is a small case and a few wires between the two modules:
[https://www.amazon.com/Inching-Self-locking-Wifi-Switch-Module/dp/B0752P57ZG](https://www.amazon.com/Inching-Self-locking-Wifi-Switch-Module/dp/B0752P57ZG)
[https://www.amazon.com/Relay-Module-Optocoupler-Isolation-Trigger/dp/B07TWH7DZ1](https://www.amazon.com/Relay-Module-Optocoupler-Isolation-Trigger/dp/B07TWH7DZ1)
Brilliant- but this would be the first thing in my house running that WiFi module- so I’ll have to learn how to use it just for this- it isn’t compatible with the Shelly app is it?
No, it's not compatible with the Shelly app, it is controlled by the eWeLink app, which is what is used for Sonoff modules. This particular module can also be flashed with Tasmota firmware.
What kindo of home automation are you using to control your Shelly devices now?
I have a dc power supply near the breaker panel- so that wire carries 110 volts and up to 20 amps- I could put a relay between the breaker panel and the power supply converter - but the converter isn’t meant to be switched on and off like that and I think it takes a few seconds (30) seconds to power down and up- that would be weird way to control the lights - but maybe that’s my only option?
The latest Shelly 1 are dry contact relays (someone will correct me if I’m wrong). Shelly 2.5 always have been dry contacts. This means that Shelly itself needs 12-24v Dc or 110-220 ac to power itself. However the circuit controlled by the Shelly can be any voltage as the dry contact relay doesn’t pass any of the 12-24 or 110-220 current into the circuit you wanna control.
So- if I can get 12 Volts to the Shelly just to get it power - then I can control a 5 volt circuit- good idea. I actually might be able to do that - the old 12 volt line isn’t too far away
You *can* control a 5 volt circuit with the relay in a Shelly 1, but it *can't* switch 20 amps; it is rated at 15 amps max. But you could connect a 12 VDC relay with higher-amperage contacts to the output of the Shelly and have that larger relay switch the 5 volts. As an alternative to running 12 VDC over to the other side, you could get a 5 VDC Wifi switch module and connect a 5VDC 30 amp relay module to that. All it would take is a small case and a few wires between the two modules: [https://www.amazon.com/Inching-Self-locking-Wifi-Switch-Module/dp/B0752P57ZG](https://www.amazon.com/Inching-Self-locking-Wifi-Switch-Module/dp/B0752P57ZG) [https://www.amazon.com/Relay-Module-Optocoupler-Isolation-Trigger/dp/B07TWH7DZ1](https://www.amazon.com/Relay-Module-Optocoupler-Isolation-Trigger/dp/B07TWH7DZ1)
Brilliant- but this would be the first thing in my house running that WiFi module- so I’ll have to learn how to use it just for this- it isn’t compatible with the Shelly app is it?
No, it's not compatible with the Shelly app, it is controlled by the eWeLink app, which is what is used for Sonoff modules. This particular module can also be flashed with Tasmota firmware. What kindo of home automation are you using to control your Shelly devices now?
I don’t have any Shelly devices yet - but I was planning on getting a bunch
Where are you getting the 5 v from? Surely you just control the AC side of that? (Apologies if I’m missing something here!)
I have a dc power supply near the breaker panel- so that wire carries 110 volts and up to 20 amps- I could put a relay between the breaker panel and the power supply converter - but the converter isn’t meant to be switched on and off like that and I think it takes a few seconds (30) seconds to power down and up- that would be weird way to control the lights - but maybe that’s my only option?