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IRIS System

 I recently read two great tutorials from gadget gangster on how to write to and read from SD card. Now this is great if you want to write pre-set text. But … Read more


Hello LMR! This is sort-of a Two in one question. I need some assistance figuring how to hook up and program the following: 1. RFID - I've been eying this for a while now: http://www.sparkfun.com/products/8419. I understand that pin 5 will tell you when a card is present, and 8 & 9 look like i2c, but what is pin 7 (format selector)? What sort of object (propeller) would I use to drive it, i2c? What about the cp pin? 2. RTC - I've also wanted to do some experiments with this cool little chip: http://www.sparkfun.com/products/10160.