PIC 12F675 RF use

Anyone use the RF transmitter in this Microchip device and the receiver in Microchips rfRXD0420?

I have had some success with transmitter/receiver modules, but these look very interesting. I'm most curious about antenna design for these devices.

If anyone has used these I would like to hear about pitfalls and problems encountered. Circuit design suggestions . . .

Many thanks.

Brad

I haven't used them but did evaluate them for an application that uses a PIC12F675 and a standalone SAW controlled transmitter (from Wen Shing). It cost less and was far simpler to stay with the separate components.

Quote:

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Originally Posted by cooksydesign

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

Brad

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

just browse ...

Alain

Thanks to both.

Brad

Do you have any design criteria?

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

So keep us posted with your design feedback , BRAD.

regards

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

Quote:

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Originally Posted by 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

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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.

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

"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 ?."

What is the chip/ frequency of use?

Hello Ron,

The chip set is Chipcon IC (CC1100) & PA IC (PA 2460).

The datasheet says "It can be used in 315/433/868 and 915MHz ISM/SRD band systems."

I also have another module which has CC1000 operating on 433 Mhz.

regards

I will send you some set up info tonight. Do you have any info on the modules? Part number, pinout...etc. Do you know the power output of the amp? Or at least who makes it.

Ron

Hi Ron,

Yes I have the details and its a ready OEM module with just a couple of pins out.

I can send you the datasheet of one such module if you want via PM.

Looking forward to your setup info.

regards