Electronics > Electronics

Transmitter/Receiver Help

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arigid:
Hi, I have been working on a project, where a change in state of a limit switch is used, to send a signal from a transmitter to a receiver.
The receiver is to be used to just activate a buzzer.
Can this be done without using a micro!?
What kind of signal does the receiver give at the data pin.?
Thanks for any help in advance.

billhowl:
You may try one of this remote relay switch


Mini 12V 1 Channel Way RF Remote Control Switch Relay Output for light  US$9.99

jwatte:

--- Quote from: arigid on December 11, 2012, 06:24:25 AM ---Hi, I have been working on a project, where a change in state of a limit switch is used, to send a signal from a transmitter to a receiver.
The receiver is to be used to just activate a buzzer.
Can this be done without using a micro!?

--- End quote ---

Yes! Just run a wire from a battery to a "normally open" limit switch, then from the limit switch to a buzzer, and then back to the battery.

If you need wireless, then some "remote relay" function like you suggest could be used.

Soeren:
Hi,


--- Quote from: arigid on December 11, 2012, 06:24:25 AM ---I have been working on a project, where a change in state of a limit switch is used, to send a signal from a transmitter to a receiver.
The receiver is to be used to just activate a buzzer.

--- End quote ---
Get a cheap wireless doorbell and activate the button via a capacitor (of say 1..10µF) and you're done. You won't be able to make it any cheaper yourself.

Check the range of the doorbell (and subtract 20..30% to be sure).
If this is for something critical, you should get a proper system.

arigid:
Thank you for the reply guys,
@billhowl, that is actually pretty good, and i am definitely buying it.

It was actually a college project and obviously has to be more of something that you make from the parts available,
I bought the Sparkfun Transmitter/receiver pair(434MHz).
Could it be possible to hook up the transmitter, such that it takes in a digital input(limit switch), without using a micro.
And send a signal to the receiver which gives a digital output!?

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