Three mains powered interlinked smoke detectors with battery backup.
Me: Press test button on one unit, all alarms trigger, job done.
Higher Authority: Press button on each unit, all alarms trigger three times, then job done.
Me: Pressing second and third buttons just tests the buttons since all alarms triggered on first press
Higher Authority: Then why isn't there a button on a wall to press and save reaching up?!
Me: Cos Screwfix don't do them dearest. Can I have a cuppa?
Higher Authority: Yes and make me one too.
So, on the assumption I'm right, I'm thinking detector dumps a voltage to the interlink wire relative to neutral? Optoisolator, box of bits, inhale flux vapour, job done. Anyone got a pointer to a DIY hack? Plan B: buy cheapest interlinked detector from same maunfacturer, cut away unwanted components until I'm left with a mains powered voltage dumper and a button to press.
Me: Press test button on one unit, all alarms trigger, job done.
Higher Authority: Press button on each unit, all alarms trigger three times, then job done.
Me: Pressing second and third buttons just tests the buttons since all alarms triggered on first press
Higher Authority: Then why isn't there a button on a wall to press and save reaching up?!
Me: Cos Screwfix don't do them dearest. Can I have a cuppa?
Higher Authority: Yes and make me one too.
So, on the assumption I'm right, I'm thinking detector dumps a voltage to the interlink wire relative to neutral? Optoisolator, box of bits, inhale flux vapour, job done. Anyone got a pointer to a DIY hack? Plan B: buy cheapest interlinked detector from same maunfacturer, cut away unwanted components until I'm left with a mains powered voltage dumper and a button to press.