I have a PIC16F88 chip I'm trying to wire up on a breadboard to flash an LED, running the internal RC oscillator. I'm using the B Knudsen CC5X compiler with MPLAB. The Config word is 3FD0h. I have WDT off, PWRT on, MCLR off, BODEN on, LVP on, CPD off, Debuger off, and CCPMX is on. I programmed the chip using the Olimex PG4 with the ICSP header and icprog on an XP system. It wrote and verified successfully. I disconnect the programmer, and wire up a 7805 with a cap going from it's output to ground. Wire up Vdd to +5v, Vss to gnd. I have an LED on pin 1, through a 470 ohm resistor to gnd. I checked with a voltmeter and the regulator is outputting 5.07v. When I apply power to the circuit, the LED may or may not stay lit or flicker. It seems most acutely affected by running my finger underneath breadboard where the chip is sitting, and the response of the LED is somewhat random. Any thoughts on why it's not running? I can supply the code I'm using, it's from Spark Fun's blink.c, but modified to use with the F88 and CC5x. All help is greatly appreciated. -- Paul Anderson VE3HOP wackyvorlon@gmail.com http://www.oldschoolhacker.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist