Bob Cousins asked: >Also, are there any example RC circuits around? http://www.myke.com/picpage1.htm And look for "Thermo.ZIP - LED Digital Thermometer" myke Check out the "Handbook of Microcontrollers" as a reference for embedded microcontrollers including information on the Intel 8051, Motorola 68HC05, Microchip PICMicro, Atmel AVR and Parallax Basic Stamp: http://www.myke.com/#MCUHand Hunter S. Thompson's quest for the American Dream, this week in the Book Room. http://www.myke.com/Book_Room/book1a.htm