I have used a fee of these: http://www.ebay.com/itm/171126910799
The transmitter is a key fob. But now I have a project that I need a remote switch to activate the transmitter, not a key fob button. I don't want to try to tear apart a key fob and 'hot wire' connections to it, as it needs to be a solid, reliable finished product.
There are dozens of these: http://www.ebay.ca/itm/190938367165
But am I correct in that you can't just hook a momentary button up these these, but rather they have to have an Arduino or something generating the code?
I see this one that uses the word 'encoder' and I think, but am not sure it will work with just a remote push button? http://www.ebay.com/itm/290964097931
But also, I am needing it within 10 days (here in USA), and this one is overseas. Does anyone know of where to buy something like this (if this will work the way I think) here in the states?
So basically, I'm needing something that works just like the key fob transmitter, but one that I can connect wires to an external switch. I only need one channel.
Thanks for any help on this!
Once you open the keyfob housing, what you have is a naked circuit board. How is that different than buying one, if it does what you want?
The first link points to a transmitter/receiver combination that does require a microcontroller or chip to generate/decode the transmission. The second link points to a board with an encoder chip, which is what you will find inside the keyfob.
jremington:
Once you open the keyfob housing, what you have is a naked circuit board. How is that different than buying one, if it does what you want?
As my original post says, I need a solid, reliable, 'finished' looking product. Not one that is made from a hacked apart key fob. Think, 'something you could market' not "something you built in your basement".
The first link points to a transmitter/receiver combination that does require a microcontroller or chip to generate/decode the transmission. The second link points to a board with an encoder chip, which is what you will find inside the keyfob.
No, it does not. The transmitter works as a stand alone key fob.
I see this one that uses the word 'encoder' and I think, but am not sure it will work with just a remote push button? http://www.ebay.com/itm/290964097931
The transmitter bit is pretty much what you will find inside the keyfob, together with some button switches.
Good luck making that reliable, 'finished' looking product in 10 days!
Think, 'something you could market' not "something you built in your basement".
Basements are very uncommon here, but a pal of mine has better machine shop kit in his garage than most pro- shops. He does market stuff he makes in his basement ok garage.... So what the hell does that comment mean?
The cheap 433.92 Mhz ASK radios do not transmit the state of the data pin.
They only transmit changes in state on the data pin , but the data must be continually changing.
You must have either a Micro controller or a data encoder like an SC2262 to make them work.
No they don't. They just constantly transmit the state of the data pin.
A switch will work fine (might need a pullup/pulldown....I never tried it)
Very misleading comment. The OOK models ("On/Off Keying") transmit ONLY when the data pin is high. Without an encoder or microcontroller, that behavior is almost useless.
No they don't. They just constantly transmit the state of the data pin.
A switch will work fine (might need a pullup/pulldown....I never tried it)
Very misleading comment. The OOK models ("On/Off Keying") transmit ONLY when the data pin is high. Without an encoder or microcontroller, that behavior is almost useless.
The receiver constantly shows the state of the transmitter's data pin (radio waves or not).
I can pull the data pin high with a push button, that makes it useful.
Those cheap receivers constantly show the state of every transmitter (on the same band) in the vicinity, all added together.
When you take your transmitter out of range of the receiver, the receiver no longer indicates that the button is pressed.
I'm glad that you find that behavior useful, but most people don't.
jremington:
Those cheap receivers constantly show the state of every transmitter (on the same band) in the vicinity, all added together.
When you take your transmitter out of range of the receiver, the receiver no longer indicates that the button is pressed.
Yep, I never claimed otherwise.
jremington:
I'm glad that you find that behavior useful, but most people don't.
That behavior isn't useful, but the behavior I was talking about is...