Relay. I have one , and did the same thing that Hara did, i have two switches:
- Switch 1 , in the 12v side of the relay. When on, the PC is on, the pump is on. Off, the pump stops, even with the PC on.
- Switch two, in the 220v side . When on , the relay depends on the above switch (1). When off, the pump is kept working independent of the state of the relay, so its a bypass.
Works great.
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