Below within quotes is my original post under the topic "RFID conundrum for start / finish line timing of mountain bike race". Instead of creating a new thread I have chosen to modify the title of this one.
I am now proposing, An Arduino Uno at the start connected to an Xbee, ID-12 RFID reader and a photoelectric switch. An Arduino Mega at the finish connected to an Xbee, 3.2inch TFT LCD module with touch panel & SD card cage, ITeadstudio ITDB02 Arduino Mega Shield V1.1 for LCD Module & DS1307 RTC, ID-12 RFID reader and a photoelectric switch.
At the start a rider would first scan an RFID card to identify themselves then they can pass through the photoelectric switch onto the course which will start the timer. At the finish the rider will first pass through a photoelectric switch and then scan their RFID card to register the time recorded as their own.
The Arduino at the start would only need to transmit the RFID card value and switch state to the Arduino at the finish. The Arduino at the finish would be responsible for everything else...
Does this sound realistic or is it back to the drawing board again?
Thanks in advance for any input, Jason
I am currently working on a downhill mountain bike race timing system based on a Mega 2560 with a real time clock and an lcd display. The Ardunio will be located at the finish line and will be directly connected to an RFID reader and an Xbee. Connected to another Xbee will be another RFID reader located at the start line. The problem is I dont know how to spec the RFID system for my application. Ideally the antenna would be contained in a 2m x 0.5m mat and the system would be able to read Tags upto 0.5m above the mat that are travelling at a velocity of up to 10 m/s. It would only have to read one Tag at any one time. All I have seen in relentless googling is complete turn-key timing systems for huge amounts of money. Thank you in advance for advice or suggestions, it will be very much appreciated!