Check you've got the RC / crystal oscillator and watchdog timer configuration bits set right..... These can cause similar problems... Ben ----- Original Message ----- From: "Eke Neehr" To: Sent: Tuesday, October 01, 2002 4:38 PM Subject: [PIC]: 16F877 Hello! Is there any usually misstake who a newbie does with the PIC 16F877? My circuit works only properly in terms of one to ten after reset! Mostly it like to works random. Anybody who has the same problem ? Regards EkeN -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.