220Views5Replies

Author Options:

How to create reed switch that activates wireless alarm? Answered

I've been reading alot about reed switches after learning about a security feature for cars, a reed kill switch. I wanted to know how to or if someone could create some kind of setup where if the reed switch closes the circuit, it will activate a wireless remote or something like an alarm within a reasonable distance from the actual switch. I've seen those window/door entry alarms. Would those work? For a car, would it be possible to have the reed switch activate a small alarm in a key fob type of thing?

5 Replies

user
steveastrouk (author)2012-07-28

Yes, window entry alarms usually use a reedswitch for the sensor. I don't understand where you#d want to mount it ? As a remote car alarm ?

Steve

Select as Best AnswerUndo Best Answer

user
booooyet (author)steveastrouk2012-07-28

I wanted to mount it where the door meets the frame of the car so if the door is opened it activates the alarm. and I didn't mean literally a remote. but just like a receiver that's triggered by the switch. and maybe a couple seconds delay, so that if i enter the car i could prevent it from activating the alarm.

Select as Best AnswerUndo Best Answer

user
crashtestmonkey (author)booooyet2012-08-07

Why don't you use the switch already there for the courtesy light?

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)booooyet2012-07-28

You could do it, but the surrounding steel may be a problem for getting it to switch. Experiment a bit.

Select as Best AnswerUndo Best Answer

user
iknowvations (author)2012-07-28

You can do it. But first decide in what condition of Car you want to trigger an alarm. That will decide how you can use Reed Switch.

Select as Best AnswerUndo Best Answer