| Electronics > Projects, Designs, and Technical Stuff |
| 3 switches, 7 lamps (no solid state) |
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| ebastler:
--- Quote from: Nusa on February 27, 2019, 10:13:34 pm ---Now take the next step and use switch 2 directly instead of using a relay. And if you decide to allow switch 3 to be 4pdt, you can eliminate all relays. --- End quote --- Of course. But the rules in the original post are pretty clear regarding the switches -- SPDT only. There's room for interpretation regarding the relays. |
| Cyberdragon:
--- Quote from: Benta on February 27, 2019, 09:52:06 pm ---"DPDT relays allowed" This is not what you originally wrote. :-- In that case, 7 SPST for the lamps, and 2 DPDT relays for logic. Edit: 7 SPST, not SPDT. --- End quote --- You misread, I said only the switches had to be spdt. I would have specified spdt relays, I just said relays. Though I should specify common relays, so no 7 pole nonesense. EDIT: I don't think relays for each light are needed. Ebastlers circuit has switches 2 and 3 isolated so they could be low voltage while only switch one sees mains, allowing for the use of low voltage relay coils. |
| bsudbrink:
Sorry for the ugly drawing, I don't have access to a real tool right now... Anyway, is there any reason this wouldn't work: |
| bsudbrink:
By the way, omit "L0" as required. |
| Benta:
On thinking a bit further, this can be reduced to two DPDT relays. |
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