Hi
im working on a project in which i have to detect an ASK receiver (which mostly use for open/close the relay to open/close a parking door or a car door) signal and when im getting closer to this reciever the buzzer should has a more Continuous sound.
Can anyone hand me a hint for the circuit and anything for this project?
the following photo shows the module we usually use for the reciever (relay part) side
Thanks

 

Sorry, I don't understand the question. You mentioned a garage door and a buzzer. I can't tell what you have or what you want to change. Thanks for the picture but a few more details would help a lot.

 

Thanks for your reply
Suppose that there is a Garage door and we dont have the remote control for it...
also we dont know where is the reciever (which opens/closes the relay)
first we need to find the reciever... So we need a circuit which can find it (i posted the reciever module which we want to find)
if the reciever is so far so the buzzer sound is not continuous
when we get closer to the reciever the buzzer sound will be more stable
i need this cicuit which can recognize the reciever location
buzzer is just for guiding the person who wants to find it and the picture i posted is just the reciever(for the door) we want to find

 

A receiver just listens. How are you going to RF detect something that just listens and doesn't ever "talk"?

 

One might walk around the garage with a sensitive receiver, listening for a local oscillator.

Many small receivers use regenerative circuits. So they don't oscillate until a signal is received.

One would need a transmit a sweep and listen for an echo, strategy.

One other strategy might be a sensitive thermal detector.

But what ever you do, it will be difficult, and if the receiver circuit designer knows you're looking for it......make it impossible.

 

im working on a project in which i have to detect an ASK receiver

Follow the wires from wherever the actuator is back to the receiver.

 

Receiver is in a locked garage ?

If its a matter of you losing your receiver you will find detection especially hard
if receiver circuit is powered down until a button press. Especially if its on a
super low speed clock when sleeping.

What is max worst case distance to receiver ?

Regards, Dana.

 

Thanks for your reply
i want to check a box to find that is there a hidden reciever in it or not
the most longest distance is something about 2 or 3 cm
i want to check is there a reciever which can open/close the relay (its near the rf reciever module) in the box or not
i dont need a lcd display or something else. i just want a sound of a buzzer to find that (should be continuesly sound)
is there any way ?
another way i thought in the past was switching on/off the relay without sending a signal ... do you think there is any solution for this??
all i want to know is discovering the reciever or relay in a close box (which i cant open it)
Thanks

 

Most modern receivers for garage door openers also have a
button on their box to activate the door relay. So a user can open
door from within garage. I gather yours does not.

Without setting up a transmitter and transmitting all possible codes
not sure you can do this.

Maybe someone else at Forum has a better idea.


Regards, Dana.

 

i found that they usually use SYN470R in the reciever part
may i find a way to make the oscillator work for a few seconds and while its working detect the oscillation procedure ?

 

It's a receiver. Does the term 'receiver' confuse you? Receiver's don't transmit per se. I can tell you this- it won't be very far from the motor used to lift the garage door.

 

I can tell you this- it won't be very far from the motor used to lift the garage door.

That's where I'm lost. What is the real purpose of this device? There may be a simple solution but I don't understand what the need is.

 

That's where I'm lost. What is the real purpose of this device? There may be a simple solution but I don't understand what the need is.

It might be handy if you wanted to break into someone else's garage.

 

Are you trying to detect a radio controlled device in a package?

 

I think the whole garage thing was just an example. Try this:

If the device in the post #1 photo is connected to a battery and sealed in a box, can it be detected by a sensing system about 1 inch away?

Is that it?

ak

 

It might be handy if you wanted to break into someone else's garage.

That was my first thought. I can't see any other reason for this question

 

Bug detection. Bomb detection.

 

i thought that this forum has many literate and educated members who can help in electronics issues
unfortunately i see some stupid and primary comments on my question
i dont see any useful answer
you changed my mind about this forum
Thank you

 

oky doky, i was trying to understand your question. I can only try. I haven't been able to read minds.


good luck.

 

This forum is very useful.
But you must admit, your question is rather strange. And strange, not clearly explained questions do get some strange answers.
Can you explain why you would need to find a receiver for a door opener in the first place? If you were in the garage legitimately, I would imagine you would have access to the receive/controller. Hence the "odd" comments to your question.
Still, if you want to leave, that is your choice.
Often, new thread posters do not like the answers they get as they have ideas of the way they want to do things already, and do not like being told it is not the best way, or even possible.