Automatic Food Warmer Lamp Timer Circuit for Hotels and Restaurants

The post discusses a simple food warmer lamp timer circuit for restaurants and hotels which can be used for automatically switching OFF the lamps after a predetermined time whenever the food under the lamps are idle or in the absence of an interaction under the lamps, thus saving precious electricity. The idea was requested by … Read more

PIR Circuit for Detecting Static or Stationary Human Occupancy Part 2

As we already discussed, conventional PIR modules are able to detect only moving living objects and cannot identify a stationary target which makes its application limited as a human motion detector only. For applications where the detection of motiolesss human occupancy becomes necessary in such scenarios a conventional PIR can become useless, and might require … Read more

PIR Circuit for Detecting Static or Stationary Human Occupancy Part 1

The post explains a method which can be probably used for enhancing a passive infrared sensor ability to detect even a static or stationery human presence. This feature is normally not possible with the conventional PIR sensors. I have already discussed many PIR based motion detector applications in this website, however all these applications requires … Read more