Okay so you received your free NFC card with the previous edition (courtesy STMicroelectronics and Elektor), and participated in the online prize raffle with your Android smartphone to reveal the card’s UID. That was simple and showed the ease and power of NFC as a contactless technology for end user applications like instant web access for transactions. Electronic engineers and programmers want to know MORE though so here we plunge into the bits, bytes, and RF signals associated with NFC.