- Rewrote the code so that it keeps a list of tags to be granted access.
- Upgraded to arduino-0021, and replaced the add on NewSoftSerial library with the built in SoftwareSerial libarary. The built in library is not as good as the add on, but it makes it easier for others to get my code running.
- Used a prototype shield and made a permanent hardware version with some LEDs
The datasheet is here:
The ID-12 is functionally identical, with a smaller range and uses less power. Pick that one for a battery operated project, or if range isn't important.
- A red LED, a green LED, 2 1kohm resistors and a switch for reset. If you don't have the miscellaneous stuff, you can get all this with the protoboard from Adafruit if you buy the proto kit for $12.50.
- A project box. This box is made for the Arduino and is easy to drill. Kinda pricey at 11.95 but I needed something I wouldn't be embarrassed to see hanging on my wall. Arduino and shield drop right in. http://www.sparkfun.com/commerce/product_info.php?products_id=10088
These electric door locks look like they should work, I haven't tried yet. Likely it will need a relay or transistor to boost the current to activate the lock, like an LM293
Electric Door Strike - Mortise Type
This was much cheaper, so i ended up getting this instead. It is really for autos but worked fine.
The sketch code follows the break...