Hi Darrell. I've bounced your question to the group, mainly because it reminded me of how EMC affects every bit of our lives, even our personal habits....
<Were you able to fix the security light coming on whenever a certain light was switched off? I have the same problem with an infrared motion detector light on my garage whenever I switch off the florescence light inside the garage. Thought I might try putting some ferrite beads on the power leads to the security light.> No, I have to confess we just live with it now. We live with the condition that if we get up in the middle of the night to use the bathroom, when we turn the light on the fan timer starts. When we come out the fan will keep running for twenty minutes and when it turns off, the security light (infra-red triggered 500W halogen) will turn on for it's time period (15 minutes). Now you'll have difficulty believing this bit...Monty Python eat your heart out... Before the 500W halogen lamp we had a high pressure sodium lamp with an inductive ballast. When this switched off it would sometimes start the bedside radio. So the scenario was this..... Get up at 2.00 a.m., go to bathroom, turn on light, turn off light, go back to bed, after twenty minutes a bright light shone through the window and woke you up. If you slept through that then when the light switched off the radio would start. The moral of this story? If you have bad EMC immunity make sure you use the bathroom before you go to sleep. Hope the beads work. This seems to be a common problem. Chris Dupres Surrey, UK.
