Hi there,
Iam new to this site but also have not alot of knowledge about elektronics. I hope you guys can help me a little.
I am trying to build an "auto top off system" for my aquarium. It will keep waterlevels at the same level.
I found some guides on the internet on how to build this (my main source: TopitOffKitPremiumInstruxCompDec07). Since i am from europe its not possible to buy from their shop, it would be wa to expensive).A floatswitch is connected with an relay that powers a pump when the waterlevel drops. Since float switches can not handle alot of volt (heard about voltage spikes that destroy the switch) it will be powered by a 12v power supply (wall plug).
My problem: power supply and relay have to suitable right? I choose a relay and a power supply from ebay and showed tthis to a friend and he told me that they dont work together. He told me the relay has a rated current that is below the current that the power supply will generate. Since i dont really understand what i am doing its nearly not possible to find the right relay/power supply.
Here the specs for relay and power supply:
Relay: omron 12v ly2n 10A 110VAC(datasheet
https://www.electro-tech-online.com/custompdfs/2011/01/ly_dsheet_gwj002-e2-10.pdf)
Power supply: 12v 200mA DC( it might be cheaper to buy one with 500mA, ist this still safe?)
Float switch: max contact rating 50w, max switching rating 250v, max switching current 1,5A, max breakdownvoltage 300vdc, max carry current 3A, max contact resistance 100mohm
Pump: 115v, 60hz, 34ma, 3W
Do you need more specs? Is power supply ok with relay? Do you suggest other products ( preferably from ebay)? I am really thankful for every help!
Silvio