This Circuit can monitor the door steps or Staircase. When a person crosses the steps, the alarm sounds indicating the entry. The circuit is too sensitive and operates in day light. The circuit uses ...

this circuits remember us that our tank is near about to get full so that we turn off our motor switch but for this circuit you need a function generator speciallyThis circuit gives out an alarm when ...

Interest in emergency systems rose sharply after 9/11 and remains high. Building owners no longer install fire alarm signaling systems just to satisfy their insurance company. Today, their motivation ...