door/window control unit
Discussion
I did have a spare, I gave it away some time back. I have full circuit diagrams for it if that's any help. From memory it's a PIC chip to do the logic and timing, two ULN2004s or similar as buffers and a bank of relays to handle the juice.
Not rocket engineering, really
My money would be on a duff ULN; they are about as trustworthy as a politician.
Not rocket engineering, really

My money would be on a duff ULN; they are about as trustworthy as a politician.
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