Any electronics people? 12v output and 10v input

[kingandy2nd]

Thanks...but now I'm confused by the conflicting advice.

What sort of relay do you recommend? If you could post a link that would be helpful.

 

[SpecialK]

What is the solenoid rated at? 12v...how many amps?

 

[SpecialK]

You can run something like this
https://uk.rs-online.com/web/p/prod...x3Qm6PquqtAjqTBf-UMaAml4EALw_wcB&gclsrc=aw.ds

it only needs 40ma for the coil and will switch 16amps

Im sure you can find something cheaper...

 

[kingandy2nd]

Hi,

The specification of the solenoid is

• DC 12V 1/4" Quick connect Solenoid valve.
• Turn on water when system start;and cut off water when system stop.
• Working pressure:0.02-0.8Mpa
• Rated power:4.8W.

Thanks for the link... I will looking into that option as well.

 

[bernardgreen]

Probably the easiest way is for you to buy one of these

https://cpc.farnell.com/interface-solutions/is-m12t/relay-12v-trans-dp-single/dp/HK00987

and connect it like this

 

[kingandy2nd]

Thank you bernard that is very helpful

 

[endecotp]

Thinking some more about this and taking into account (a) your level of experience based on your comments, (b) a guess that this “aquarium computer” is probably not cheap, and (c) knowing how much back-EMF you can get from a solenoid, my suggestion would be to get an opto-isolated relay module. These are widely available from e.g. eBay etc.

 

[kingandy2nd]

Thank you. Yes, I'm a total novice... and yes the aquarium controller is expensive

I'm going to order a few of the options here and have a play with each one. I will report back.