flemmard

Hi all,
Need some help on my project.I wish to send data (5 hexadecimal digits) from EEPROM of my PIC16f877 to PC WIRELESSLY. The range can be less than one meter.Not a problem !

Is it better to use IR or RF ? Either is ok with me.How do i interface my IR transmitter circuit to PIC? And how do i receive those data to PC?
Any circuits available for reference?

Thanks !

penoy_balut

IR is cheaper and easier, you can transmit data by modulating 38kHz in infrared diode and receive data by interpreting modulation on the receiver

bananasiong

Use IR for this range.
http://winpicprog.co.uk/pic_tutorial5.htm

__________________
Superman returns..

ericgibbs

hi,
Over such a short range ie: <= 1mtr, [PIC to PC] why dont you want to use a wire link?

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

flemmard

No, the user have to carry this PIC board.So, it's not attached to PC always.

ericgibbs

hi,
There are connectors on most PC's USB,RS232, Parallel Port.

A connector system would be a lot cheaper that IR or RF.

Can you give us a little more background on your project?

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

flemmard

Hi,
Thanks for your reply.My project is basically concerned about security like RFID.But in my project, i thought of using PIC microcontroller to store the security ID number of user(i.e worker to enter in his/her office) and retrieve the ID number from PIC whenever he wants to check-in to his/her office.
Check-in kiosk is my PC. So, PIC board will be his ID card in this card.
That's why i need to do that with IR.Any help would be appreciated

I'm just doing my home project.

ericgibbs

hi,
It sounds an interesting project.
With an IR system the 'pic board' would have to be 'visible', that is the user would have to wear it in view or pull it from their pocket, when entering the room.
The advantage of an RF system is that the user could have the 'pic board' in his pocket/handbag etc....

It would have to be a limited range RF, else the other RF boards could cause problems, depending if you design the system to be automatic or the user has to push a button to activate the RF system.

What did you have in mind?

__________________
Eric
"Good enough is Perfect"

PIC tutorials:
Gramo's: www.digital-diy.net/
Bill's: www.blueroomelectronics.com/

pc88

Have a look at this project:

http://cappels.org/dproj/minmassrf/M...s_Coupler.html

and also search for "minimum mass" on this page:

http://cappels.org/dproj/Home.htm

for other applications using this idea.

Super_voip

or try Dallas 1-touch range of security products

flemmard

I would like to go for push button kinda stuff? Is there any RF module in very short range?
BTW, i understand that Microchip has come out with RfPIC .Can i use that?
Please advice