Since my last message regarding this subject never made it live, I will try this again.
Has anyone created a PCB for the Key FOB enclosure that Sparkfun is selling? It is the same enclosure that the Nordic Key Fob uses. I am considering using this enclosure to create my own transmitter and I am wondering if there is enough vertical room inside for one of the RF Transmitter modules along with the PCB?
Any other gotchas when using this enclosure?
I also have some old X10 key fobs that I believe are 315Mhz. I am wondering if I could just use one of these instead with a 315Mhz RF Receiver module on the other end and forgo creating my own fob. I am not sure what kind of modulation these X10 fobs are using, but I am assuming if they also use ASK, that I should be able to receive the signal with one of those modules, then decode it from there. I haven’t been able to dig up any other information on the X10 key fobs but I did take one apart and I see that it has an PIC processor and some other discreet SMD components, but no other IC’s that are apparent.
On Homeseer.com’s forum - you’ll see guys that purchased and use a third-party RF receiver for X10 (and other RF) with a serial port translation. It’s rather expensive though.
On Homeseer.com’s forum - you’ll see guys that purchased and use a third-party RF receiver for X10 (and other RF) with a serial port translation. It’s rather expensive though.
Thank you for the heads up. I should probably clarify my intentions here. I am not really trying to do anything X10 related, other than the fact that I have these X10 key fobs that I was hoping to re-purpose for a project where I need a compact remote to turn a siren on/off. I did a little more research after this post and discovered that I might be out of luck here. X10 RF uses 310 Mhz, the RF modules here on Sparkfun are 315Mhz or 434Mhz. So right off the bat unless I can some how detune the 315Mhz receiver for 310Mhz (and this is out of my level of expertise), this probably isn’t going to work. I do have another key fob remote (non X10) that uses 315Mhz so I will probably be better off going that route and figuring out how to decode it.
I am still curious about the key fob enclosure and how much room there would be for an RF transmitter module.