So I've done some testing.....looking at some sort of PCB circuit now....
I've constructed the circuit using 12V electronic downlights, a trailing edge dimmer and 360deg ceiling motion sensor (see attached). I've only tested 1 downlight setup to date, but I'm not convinced this is the best solution.
A couple of issues from testing;
1. Motion sensor clicks....I have found an alternative sensor which has a relay arrangement.....so this issue may be closed.
2. When the sensor goes open circuit, the light dims but goes fractionally bleow the dim setting on the dimmer and then rises again to the set dimmer level.
What I'm looking for now is an alternative PCB/diy type cirucit I may be able to construct to act as the dimmer.
Example (see attached schematic)
Wife'y walks into kitchen and nothing happens, goes back to main light switch and switches it "on" the PCB/diy circuit forces the lights to be dimmed to a preset level.
Wifey moves into kitchen, and the sensor picks up movement and goes closed circuit.
The PCB/diy circuit ramps up the lights to full brightness over 1 second. (Somehow storing 1seconds worth of energy for later* (approx. 360mWHr)
Wifey works away in the kitchen and the motion sensor keeps registering motion so it stays on and lights stay on.
Wifey leaves kitchen and then after set time duration the sensor goes open circuit.
PCB/diy circuit acknolwedges the open circuit and dims to set value over 1 second utilising the stored energy from * for that 1 second ramp down.
Lights stay at dimmed level until power has been cut by main switch.
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Any ideas?
I was hoping to use an old motion sensor light with lux/sensitivity pots on it (no duration though). I could possibly forego the duration time and connect this to the other circuit with a relay of some sort.
Addendum...I found this over on a nother site....must be commercially available units out there as well.....
**broken link removed**