Bob, Thanks for thePICinfo. I'll look for those 16F628 threads on the listserv to try to learn more. I think these LED's may just work for PIC use. Luckily they are the Lite-On LTC-3710series that have all 4 digits. The LTC-3718 series have the 1 as the 4th digit as you described on the same data sheet as the 3710's. Here is a URL link for the data sheet: http://203.69.73.5/liteon/ By the way, there is an auction on ebay for 672 pieces (same as what I got) that is presently going for $26 if anyone is looking for PIC LED displays Regards, Mike ----- Original Message ----- From: "Bob Ammerman" To: Sent: Thursday, August 09, 2001 7:31 PM Subject: [PIC]: Building a Servo PIC16F628 > 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 > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu