Thanks all for the help... I forgot to mention that this is a Frequency counter circuit, maybe you can refine and guess the ic again. Regards Tal Bejerano AMC - ISRAEL -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of David Duffy Sent: Sunday, November 17, 2002 11:01 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [PIC]: can u identify the chip? Tal: >I found this circuit and I have some questions, please help if you can: > >1. Can you identify the nameless ic on the left side of the pic? Looks like a quad NAND gate - maybe a 4011 or similar. >2. As you see in the circuit the pic is 16c54, but the Hex file that came >along with the circuit regards to 16f84. are they the same pin outs / code? Pinouts are the same. Code should be very similar. (RAM addresses,etc) David... -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu