A 2 line X 16 character LCD display that is battery operated and works without an external connection.

Its an adaptation of the 2X 16 LCD project, by adding a fettite loop antenna,
two resistors, and a capacitor. Here the display shows the output of the
10 bit scanning voltmeter with Minimum Mass Wireless Coupler. Both the
ferrite loop antenna and the scanning voltmeterare described elsewhere on this site.
Download the AVRStudio assembly source for the program: rftruly040802A.asm
Download the AVRStudio assembly source for the include file: vlfcw2313.inc
For more detail: Minimum Mass Wireless LCD Display using ATtiny2313 microcontroller