I have pot lights in the eves of the front of my house, controlled by a motion sensor. It is one of those dimming ones that for six hour after dusk, the lights come on at about 40% and when there is motion detected, the lights are bumped up to 100%. After the six hours, until dawn, the lights go off and remain off until motion is detected, at which time, they go to 100%.

What I want to do, is to interface the light over my front door, but of course, there is a catch. I want the front door light to either be off or on 100%. I figure that the dimmer in the Dual Bright motion detector is a PWM (I haven't pulled out the scope to confirm that yet.)

What would I need to achieve this? I figure that the interface circuit would have some type of a threshold action, that once the incoming AC waveform on the sense input reaches 100%, the circuit would switch on the electricity to the on/off output. I have an idea on how to do it if the dimmer was a linear variable voltage but not with the PWM dimmer.

Any suggestions? BTW, the lamp that I will be controlling will be a dimmable 8 watt LED lamp. I figured that I would put the interface circuit in a 4" j-box and it will have a unswitched 110 volt AC supply.
Thanks,
Ted

 

You really need to know what you have. If the 1/2 full bright is a triac dimmer type device they you might get over using a mains voltage relay for your front door lamp. That is just a total winging it guess. To really come up with something you will have to know how what you have actually works.

Ron