Mike, In many respects the F628 is just a better F84. There have already been a few threads on the gotcha's when subbing the former for the latter. One thing to watch out for with the clock displays: depending on the chip they were intended to work with they may multiplex in very interesting ways. (As in the the old Chinese curse: 'may you have an interesting life'). I have some such displays which have only two cathodes and something like 14 anodes, wired in a funny scrambled sort of way. I had to build some pretty tricky code/tables to translate from the desired output to the correct output pin states. Also be aware that a lot of these displays are not a true 4 digit display. Often the high order digit contains only the segments needed for a 1 (or sometimes a 1 and a 2). Bob Ammerman RAm Systems (contract development of high performance, high function, low-level software) ----- Original Message ----- From: "Mike Kendall" To: Sent: Thursday, August 09, 2001 9:32 AM Subject: Re: [PIC]: Building a Servo PIC16F628 > Bob, > Being that I'm one of those 2,000plus readers I've paid attention to > this and previous mentions of the newer/more-enhanced PIC16F628. I'm a > believer in the addages "If the spoke is broke fix it" and "if it's not > broken, don't fix it". This saying meaning sometimes it's better to replace > the entire wheel than to fix the spoke, but if it's not broken in the first > place.... Anyways, I've been gearing up for quite some time on a project > that will use a digital frequency readout. I've seen alot of existing > plans/code for frequency counters with displays that use pre-scalers. One, > in particular uses a $3 digikey prescaler chip (cant remember the chip right > now) and is claimed to work up to 2.4ghz. I would not need to go anywhere > near that high as a counter for this project. With this in mind, I wonder > what code exists as "freeware" to use as a counter with the newer PIC16F628 > or if the older F84 code will work on these newer chips? I'm guessing the > code won't because of the differences in the clock speed. My display will > consist of 4 digit LiteOn LED's that were origionally intended for clock > diplays as there is a colon in the middle of the display. It can easily be > used as a simple 4digit LED just the same. Reason for these LED's is that > I've got over 650 of them to use up. I'd rather not have to write code for > this project at my present level of PIC expertise. > 73, > Mike Kendall ke6cvh@the-i.net -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu