PIC 12F675 RF use

[Acetronics2]

I'm most curious about antenna design for these devices.

Brad

Here : http://www.microchip.com/stellent/id...AN831&x=9&y=10

just browse ...

Alain

[cooksydesign]

Thanks to both.

Brad

[Ron Marcus]

Do you have any design criteria?

[charudatt]

I have some samples with me and would really like share your experience.

So keep us posted with your design feedback , BRAD.

regards

[cooksydesign]

Only parameters I have at the moment are size, distance, and power requirements.

The size of the circuit board has to be about 1 inch tall and 1.5 wide. Powered by a 9 volt transistor battery through a 3.3 voltage regulator. Distance for transmitting data is less than 100 feet, probably closer to 50 feet.

I think thats all I have right now. I haven't started yet, just gathering info. Best place to start, other than Microchips' site, is here.

Thanks for all the responses.

B

[Ron Marcus]

Only parameters I have at the moment are size, distance, and power requirements.

The size of the circuit board has to be about 1 inch tall and 1.5 wide. Powered by a 9 volt transistor battery through a 3.3 voltage regulator. Distance for transmitting data is less than 100 feet, probably closer to 50 feet.

I think thats all I have right now. I haven't started yet, just gathering info. Best place to start, other than Microchips' site, is here.

Thanks for all the responses.

B

I've had great luck with Lynx technologies modules for simplex operations. For 100 feet, most of the inexpensive modules,both AM or FM will work fine. I've been using the Chipcon CC1100 chip ICs for two way comms with great results but this is way overkill for your purposes (also a pain to solder!). For simple AM opps.,the Micrel transmit and receive chips are great.

[charudatt]

Hello Ron,

Nice to know about your work experience. I am planning to work on some ChipCon OEM modules (Taiwan Modules using ChipCon) chipset and would like some help from you in configuring them.

Have you got any code for configuring them in PBP ?. Well I would (can) only be able to give you some details of the chipset tomorrow and maybe some photographs of the same.

I also have Cypress RF Modules. They look very neat and , I feel are also easy to use. They are cheaper also. They are transreceiver modules in the 2.4Ghz ISM band. I am also in the process of designing a development board for these modules and can post it , if required.

More on these later.

regards