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How to make a door alarm?
i have a battery and a buzzer but i need to make a door alarm so that when the door opens the alarm turns on and i dont have a battery pack can someone please tell me a way to do this and tell me what to use ? !
1 Answer
- 異域秦後人Lv 710 years agoFavorite Answer
Parts:
Normal close push button switch................. 1
http://www.madvapes.com/Push-Button-Switch--Closed...
Buzzer 6V................................................. 1
Alkaline D size 1.5V battery ................................ 4
Battery holder for 4 pieces D size cell ................... 1
Wire AWG # 18 .................................................. 3 feet
Assemble and connection:
Install 4 cells into holder to make a 6 volts battery pack.
Use soldering iron to join......
+6V ----- push button switch ------- buzzer ------ negative of battery.
Attach push button switch to the edge of door.
Install a small piece of wood at the place against the top of push button ,so that circuit cuts off while door is close.
Buzzer rings as door open while push button switch release back into "normal close" position.
= DONE =
