Ficara’s oscilloscope scrolling text display project uses just one PIC chip & no other components (well, battery/power supply of course :) –

Scrolling text on oscilloscope, built with only one component: the Microchip PIC16F628A. The characters to be displayed are stored in EEPROM (ascii codes from 0x20 to 0x5f so numbers, capital letters and special characters).
The oscilloscope will be set for 2mS/div on X axis and 1V/div on Y axis. One full screen contains 10 characters.

More info + source available here. [via Hacked Gadgets]