Hi everyone, I have bought the following type of time module relays that require an input power of 12Vdc.
https://www.aliexpress.com/item/33016810393.html?spm=2114.12057483.0.0.47574b4dHY2JMJ
I would like to ask whether I could power these relays with an input voltage between 9Vdc to 10,5 Vdc or not. Would it be safe for the modules? Thank you very much.

 

The electronics will probably work with a 9V supply, but the relay will be a problem. Even if it activates at that voltage, there may not be sufficient pressure between the contacts to ensure reliable continuity.

 

The electronics will probably work with a 9V supply, but the relay will be a problem. Even if it activates at that voltage, there may not be sufficient pressure between the contacts to ensure reliable continuity.

Ok, so as far as the electronics are considered, we are safe to power the module with a 9 volt battery. That's my main concern, only the electronics of the module. I have tested the relay down to 10 Volt and it has the pressure to ensure a relaible continuity. I just don't want to burn the module's electronics. So, apart from the relay, you beleive tha the rest of electronics are safe, is that right?

 

So, apart from the relay, you believe that the rest of electronics are safe, is that right?

Yes. The module uses a NE555 chip, no problem at 9 volts.

 

Are you sure it's the 12 volt model and not the 5 volt?

 

Are you sure it's the 12 volt model and not the 5 volt?

Yes I am totally sure.

 

Yes. The module uses a NE555 chip, no problem at 9 volts.

Hi again! I would like to ask something more. The fact that the 12Vdc relay works at 9.5 Vdc input, does it mean that it is overworking due to the lack of energy, and there is danger to get burnt? Thank you!!

 

Hi again! I would like to ask something more. The fact that the 12Vdc relay works at 9.5 Vdc input, does it mean that it is overworking due to the lack of energy, and there is danger to get burnt? Thank you!!

No, nothings going to get burned.
The fact that it works at 9.5 volts is because the relay specs indicate the pickup voltage is 9 volts.
Are you wanting to operate the module from a 9 volt battery?

 

Yes, in fact I power the relay module through a mini dc-dc converter that gets powered from a 9 volt battery. However, I have to keep the dc-dc converter's output regulated at 9,5 Volts as it parallely powers another IC in my project's circuit that strictly needs 9.5Vdc at it's input. I hope you understand. I tried it and it works fine. Thank you for ypur help!