Post by thread:[EE]: Dual digit LED display

> > > Does anyone have a source (Mfg. or distributer) for a two digit > "multiplexed" > > (that's important, only 10 pins) superbright (also important) 0.56" high > LED > > displays with Common Anode. Although KingsBright's website lists it > there, they > > do not actually have any (or at least none to send as a sample any ways). {Quote hidden}> > Everyone makes multiplexed 3 & 4 digit displays, but I've yet to see a 2 > digit > > display that way. Is there a reason for this (other than a 3 or 4 digit > direct > > drive would be a real layout headache)? > > > > I've discovered that laying out the PCB traces for a single sided board > for that > > takes up gobs of space on my board. Space that I can't afford. My only > other > > option is to do a double sided board (ie, where do i get those little > brass > > through hole rivits and punch tool at, etc...). Through hole plating gets {Quote hidden}> a bit > > involved and expensive, and I'd be wanting to do a minimum of through > holes any > > ways.... I think I may have seen some of those little rivets in the > Mouser > > catalog, but they won't sample me any to try out. > > > > Any and all leads are appreciated. > > > http://www.forge-europa.co.uk/ > > Regards > Chris > -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

-----Original Message----- From: Bob <.....op1cwkKILLspam@spam@flashmail.com> To: piclist <PICLISTKILLspamMITVMA.MIT.EDU>; PICBasic <.....picbasic-lKILLspam.....qunos.net> Date: Thursday, March 22, 2001 3:14 PM Subject: Dual digit LED display >Does anyone have a source (Mfg. or distributer) for a two digit "multiplexed" (that's important, only 10 pins) superbright (also important) 0.56" high LED display with Common Anode. Although KingsBright's website lists it there, they do not actually have any (or at least none to send as a sample any ways). Everyone makes multiplexed 3 & 4 digit displays, but I've yet to see a 2 digit display that way. Is there a reason for this (other than a 3 or 4 digit direct drive would be a real layout headache)? I've discovered that laying out the PCB traces for a single sided board for that takes up gobs of space on my board. Space that I can't afford. My only other option is to do a double sided board (ie, where do i get those little brass through hole rivits and punch tool at, etc...). Through hole plating gets a bit involved and expensive, and I'd be wanting to do a minimum of through holes any ways.... I think I may have seen some of those little rivets in the Mouser catalog, but they won't sample me any to try out. Any and all leads are appreciated. Thanks in advance, Bob. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

On Fri, 23 Mar 2001 02:25:28 -0600, you wrote: >-----Original Message----- >From: Bob <EraseMEop1cwkspam_OUTTakeThisOuTflashmail.com> >To: piclist <PICLISTspam_OUTMITVMA.MIT.EDU>; PICBasic <@spam@picbasic-lKILLspamqunos.net> >Date: Thursday, March 22, 2001 3:14 PM >Subject: Dual digit LED display > > >>Does anyone have a source (Mfg. or distributer) for a two digit "multiplexed" >(that's important, only 10 pins) superbright (also important) 0.56" high LED >display with Common Anode. Although KingsBright's website lists it there, they >do not actually have any (or at least none to send as a sample any ways). >Everyone makes multiplexed 3 & 4 digit displays, but I've yet to see a 2 digit >display that way. Is there a reason for this (other than a 3 or 4 digit direct >drive would be a real layout headache)? yes - they want to keep their products flexible - on a 2 digit display, number of pins is not normally a problem. >I've discovered that laying out the PCB traces for a single sided board for that >takes up gobs of space on my board. Space that I can't afford. Instead of using a hard-to-find muxed display (if it exists), there is another option, if you just apply a little lateral thinking.... It is not actually necessary for the segments of each digit to be connected to the _corresponding_ segment of the other digit - they could be connected to ANY segment of the other digit. The segments can be interconnected in whichever way is most convenient for your PCB layout. The software would simply use a different 7-segment lookup table for each digit, which would probably take no more than about 10 extra words (7 for the table and a few to select the table depending on digit). -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

At 09:37 PM 3/22/01 -0000, you wrote: >> >> > Does anyone have a source (Mfg. or distributer) for a two digit >> "multiplexed" > (that's important, only 10 pins) superbright (also important) 0.56" high >> LED Why not just use 2 of the 3 digits in a 3 digit display? We use thousands of these super bright displays, and it's not a bad choice, even in fairly high quantity. Sometimes we leave one of the middle digit(s) blank to show two independent variables. Best regards, =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Spehro Pefhany --"it's the network..." "The Journey is the reward" KILLspamspeffKILLspaminterlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= -- http://www.piclist.com hint: To leave the PICList RemoveMEpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu