You've got 16 lights you want to randomly switch.

Chose a PIC with EEPROM. Fill the EEPROM with a random selection of numbers, and you're away. Nobody's ever going to guess you're recycling a 128 or 256 step sequence - just not humanly possible to remember more than 20 or 30 steps - if anybody can, and can do say 50 numbers repeatedly, contact me - there's a Cassino I wanna hit...

Melanie