A couple AC loads with common end.

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1

Would it be possible to control a couple AC loads with common end by a NO contact. Must follow these points:

  1. Both loads are never turned on at the same time.
  2. When a load is powered, the another one isn't.
  3. It's also possible to use other components such as resistors, capacitors, etc

L1
|--///-- |-------------| NO contact
N ---| L2 (...) | Extra circuit | (...) -----/ ------ (...) ----- L
|--///-- |-------------|

2

albuino:
Would it be possible to control a couple AC loads with common end by a NO contact. Must follow these points:

  1. Both loads are never turned on at the same time.
  2. When a load is powered, the another one isn't.
  3. It's also possible to use other components such as resistors, capacitors, etc

Using an SPDT relay would take care of Nos. 1 & 2
The relay's C terminal should be connected to "Line" (a/k/a "AC+", "Hot", etc.)
The relay's NC terminal should be connected to one load and the relay's NO terminal should be connected to the other load.

I don't know what the intent of No. 3 is.

3

Using an SPDT relay would be very easy. I mean to use an SPST!

Since I want to use an SPST, there must be something more which will take care of Nos. 1 & 2, as you have understood properly.

4

You can do this with 3 MOSFETs, 4 resistors, 2 diodes and 2 NO relays.

If you have Java working in your browser, you can see it in action in the falstad simulator.

NOswitch1.png
NOswitch1.png800×365 3.63 KB

5

majenko:
You can do this with 3 MOSFETs, 4 resistors, 2 diodes and 2 NO relays.

Excellent! Great circuit. This has been the idea of the post. Fortunately, I have been able to see it in action in the falstad simulator. It is really nice to see it working.
I would have liked to see it by just a single NO relay. But I guess, there is no way for that.
Thanks.

6

many relays had a set of NO contacts and the alternate set of NC contacts. Depending on the relay you have, it would be entirely possible with 1 relay.
If your relay only has 1 set of NO contacts, then you cant do it with the relay alone.
UpVote for majenkos post.