Posted: Thu Jul 26, 2012 9:21 am Post subject: Re: DIY Aquarium Controller - Working and In the Tank Now !!
Imran those relays will be fine. But note there will be a problem info am
Not wrong each relay requires 80-120ma to start, plus the ULN IC that he has used will need some current. You need To exactly determine how much current your entire system wil use as most of them will use the 5v in the Arduino to drive all the components. But the Arduino has a limited current output and will freeze if you draw more.
Hence I have a separate power Circuit to drive all my iCs lcds keyboards ad relays.
As a matter of fact I am using these relays (no the Same circuit, my own) and running my chiller which in a 1hp one on that. So they can take a pretty high load as most of the equipments don't need more than 1a exept for chillers that range Between 2 to 5a.
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