People Who REALLY Build Things! Message Board › RFID reader project - need help & ideas

RFID reader project - need help & ideas

Scott T.
staggart
Roseville, CA
Post #: 124
Hi all,
I am looking to build a simple, cheap rfid reader system for an annual bike race I put on. W/o going into all the race details, let's just say that I can bring the riders to a stop (not preferred) to scan them and that it's OK if I serialize them as I scan them (meaning I don't have to scan 10 simultaneously). Anyway, I am willing to do all the s/w, etc. so no worries there. I am looking for ideas on both the reader technology (ideally, I could have something a riders just gets near but I could settle for something I have to wand them with) and the rifds themselves. I know there are throw-away types that are < $1 each that can be stuck on things all they way up to epoxy encased things that are $25 each. Ideally, my budget is a few hundred bucks. Ideas & thoughts greatly appreciated.
Marsh
MarshWildman
Group Organizer
Sacramento, CA
Post #: 2,076
You can get a phone or tablet with NFC (Near field communications) and use inventory control tags. But the more common D-Tags used in racing would likely be cheaper. The D-tags or B-tags are less than $1.00 each. The reader is really nothing more than an antenna hooked up to the right kind of receiver.
Here's how they work...
http://electronics.ho...­
It may be a challenge to set that up. If you can get your hands on a Google Nexus-S smartphone, there's an app for that, but you'll have to come within a few inches of each NFC tag. You should be able to get a Nexus-S for under $100. NFC tags are less than $1 each in quantity.
Scott T.
staggart
Roseville, CA
Post #: 126
Thanks Marsh. I am looking into the credit-card sized tags and an integrated antenna/receiver unit that claims it works up to 15M. The unit costs about $1k. Other options are to buy the receiver and antennas separate but the units I have looked at come out costing about $2k. Ideally, I could spend < $500 and make this work. I am less concerned about the tag cost than the receiver/antenna combination since I can buy tags once and re-use, etc. if they are more than just the stick-on things.


You can get a phone or tablet with NFC (Near field communications) and use inventory control tags. But the more common D-Tags used in racing would likely be cheaper. The D-tags or B-tags are less than $1.00 each. The reader is really nothing more than an antenna hooked up to the right kind of receiver.
Here's how they work...
http://electronics.ho...­
It may be a challenge to set that up. If you can get your hands on a Google Nexus-S smartphone, there's an app for that, but you'll have to come within a few inches of each NFC tag. You should be able to get a Nexus-S for under $100. NFC tags are less than $1 each in quantity.

Marsh
MarshWildman
Group Organizer
Sacramento, CA
Post #: 2,079
There's a place on Folsom Blvd. called Surplus Stuff. You never know what they may have in store. It's not out of the realm of possibility that they may have an inventory control system in stock.
Marsh
MarshWildman
Group Organizer
Sacramento, CA
Post #: 2,080
This is as close as I could find to a home brew solution. It includes schematics.

http://www.eng.tau.ac...­
Scott T.
staggart
Roseville, CA
Post #: 127
Marsh,

As much as I would love to work on this project from scratch, unless someone else got actively involved to work on the H/W, this isn't something I could currently tackle (due to the required time). I could easily cover all the s/w. So, that's an open offer...

This is as close as I could find to a home brew solution. It includes schematics.

http://www.eng.tau.ac...­

Marsh
MarshWildman
Group Organizer
Sacramento, CA
Post #: 2,081
I'd check Surplus Stuff or any of several surplus (Weird Stuff, Halted, Silicon Valley Flea Market) outlets in the bay area for and inventory control system.

Here are some links...
http://makesf.pbworks...­)
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