I have used PIC microcontrollers that measure the voltage of a signal at a particular instant in time with an A/D converter that converts the value into 0-255 (8-bit) or 0-1023 (10-bit). What PIC microcontrollers do the opposite - convert a value (0-255 or 0-1023) into a 0-5V voltage output? What examples of completed projects that use the D/A are there? -- Jason Hsu http://www.jasonhsu.com/swrwatt.html http://www.jasonhsu.com/swrwatt-c.txt http://www.jasonhsu.com/swrwatt-asm.txt -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist