Remote control

chris jones · 2012-04-20 14:21

Hello,

i need some help with an idela i have i have a outside box that has a rf sensor for a remote. is there a way i can send rf signals to that box and move the chanels form my basic stamp board of education ?

erco · 2012-04-21 14:56

Not certain what you mean. Can you please rephrase the question with more detail?

chris jones · 2012-04-22 19:26

ok, i have a remote and a motor rotor box that is controls with the remote and box. i would like to have the basic stamp board have an array of commands that will move the rotor motor by sending the recover box signals.

Franklin · 2012-04-22 19:31

You will need to find the frequency the remote is using along with the codes it is sending. Then with the proper radio you might get this to work. Or you could hack into the remote and take over the controls in it.

chris jones · 2012-04-22 19:35

hmmm what will be the best way to do that ? is there something i can do to get the code from the remote like a function that can learn the signals ?

erco · 2012-04-22 19:41

Do you have an oscilloscope?

chris jones · 2012-04-22 19:42

no but i can use my friends if i will need it for this project...

chris jones · 2012-04-22 19:45

i also have a propeller chip will the object IR kit form this URL ?
http://obex.parallax.com/objects/37/

NEVER MIND I USE RF NOT IR

PJAllen · 2012-04-22 19:45

Unless the object is to make a second remote, you could work out a Stamp to Remote interface, essentially using the Stamp to push the buttons - activating relays (relay contacts) in parallel with the remote's buttons. You could make it dis/connectable.

PJAllen · 2012-04-22 19:46

Is it RF or infrared (IR)? They're not interchangeable.

chris jones · 2012-04-22 19:47

HMMM @PJ Allen how will i make it puch the button with servos

chris jones · 2012-04-22 19:48

sorry, its RF

PJAllen · 2012-04-22 19:53

chris jones wrote: »

HMMM @PJ Allen how will i make it puch the button with servos

Who said "servos"? I said "relays". They're not interchangeable.

chris jones · 2012-04-22 19:57

ok i see where you are going with it.i have never use relays how would you go about using relays to push a button on a remote.

PJAllen · 2012-04-22 20:04

You know how a switch works, I assume.
Your remote has a number of switches (push buttons).
Imagine having a switch with another switch in parallel with it, two switches with the same result.
Here's what a relay is all about.
So, you have those relay contacts (switches) wired in parallel with your remote's buttons, activating them with OUTPUTs from a Stamp.

chris jones · 2012-04-22 20:13

what type of relay do i need ?

PJAllen · 2012-04-22 20:20

You might want to break open your remote first, to see if you're up to this.
I don't know what your skill-set is, but there's more to this than desire.

Look for a "reed relay", a 5V, Radio Shack sells those.
Get the hang of it with one and then go back for more.

chris jones · 2012-04-22 20:20

will this relay work
Sharp 8A Solid State Relay

http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/relay/List/0/SortField/4/ProductID/657/Default.aspx

Duane Degn · 2012-04-22 20:20

I had a project that used relays to simulate button presses on a cell phone. The Propeller controlled the relays which allowed it to send text messages.

attachment.php?attachmentid=84089&d=1313466533

attachment.php?attachmentid=84089&d=1313466533

This is a really inefficient way of sending text messages with a microcontroller but it might be a good method to control your remote's keypad.

I wish I had made of video of this project. It was a lot of fun hearing the relays click away as it entered a text message.

PJAllen · 2012-04-22 20:23

chris jones wrote: »

will this relay work

That is mega-overkill.
I gave you a good lead.

Good example, Double-D.

Duane Degn · 2012-04-22 20:23

chris jones wrote: »

will this relay work
Sharp 8A Solid State Relay

http://www.parallax.com/StoreSearchResults/tabid/768/txtSearch/relay/List/0/SortField/4/ProductID/657/Default.aspx

No, that will only work with AC. You want a good old fashioned clicking relay. If no one else posts a link to an example, I'll find an example.

Edit: You should be able to find it from the info PJ gave you.

chris jones · 2012-04-22 20:31

Thanks PJ Allen and Duane Degn

Duane Degn · 2012-04-22 22:28

Here's the one I used in the cell-phone project.

http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=us&KeyWords=z2774-nd

Radio Shack sells some little 5V relays. Most relays need a transitor to power the coils and a diode to protect the microcontroller from voltage spikes.

The last page of this Nuts & Volts article shows how to use a relay with a microcontroller.

Remote control

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