Hello all,I use FSBus classic boards and I want to continue using these classic boards. I have two questions:1.Is it possible to add a sixth 7-seg Led display to the existing circuit?2. If yes, how to do that?Many thanks for your help.Regardschris31257

Hi Chris, I don't think so, because fsbus can go up to 31 controllers.Best regardsJan Geurtsen

Hi Jan,Thanks for the answer, never mind, I will stay with my old config.RegardsChristian

HmmAs long as he still didnt used all 31 cid s available , why could he add additonal display board tohis setup and have more 7 segments displays?Dont see any reasons why not

I don't think that's what he asked for...I think the question had to do with number of digits PER display controller...So, Neg.. You cannot. The firmware and circuitry of the FSBus classic display board supports up to 5 digits per display controller.You would have to change the firmware (most important) and then the circuit to support an extra digit, which I'm not sure that the PIC16F84A has enough output lines to support.George DorkofikisAthens, Hellashttp://online.vatsimindicators.net/811520/1704.png

georges,You have understood my problem.I understand that the FSBus classic doen't support 6 digits per display like as the new FSBus2.Many thanks all for the answers.Christian

>georges,>You have understood my problem.I understand that the FSBus>classic doen't support 6 digits per display like as the new>FSBus2.>Many thanks all for the answers.>Hi!If your after the "looks" only, then you might "steal" 5V from a pin on the display connection header. There is one (or two, dont remember) pins there with constant 5V. I did this to get a constant "zero" for the 6th digit on the COM radios. Depending on the type of displays, just connect all the anodes/cathodes (a,b,c,d,e,f) to the 5V/0V and viola. Your displays (like mine) might also require a resistance in series.http://forums.avsim.net/user_files/145873.jpgAll the bestOle J. Almenningenhttp://www.737cockpit.no

Hi Ole,This is a nice approach if you want to simulate 6 digits on the COM/NAV frequencies...But not totally correct as you implemented it.The last digit changes according to the frequency between 0 and 5 as the frequency step is 25Khz.So, the 123.570 is wrong and should display 123.575 instead.On the other hand, the first digit is constantly 1 (one) and never changes as the frequency range of both nav and com are within 108.000 to139.975 Mhz.Personally I would advise to hardwire the 1 and offset the rest of the display. You will need just 3wires to do that (four less than the 0).George DorkofikisAthens, Hellashttp://online.vatsimindicators.net/811520/1704.png

Hi Georges,You have an excellent idea, I will do that as soon as possible.I'm sure that will work fine.Christian:-)

>On the other hand, the first digit is constantly 1 (one) and>never changes as the frequency range of both nav and com are>within 108.000 to>139.975 Mhz.>Personally I would advise to hardwire the 1 and offset the>rest of the display. You will need just 3wires to do that>(four less than the 0).Didnt think of that, makes it even better!As for the number of cables - all one need is one core (5V, already present on the connectiopn header) to power all the needed segments, no matter what (constant) number one needs to represent.Anyway, thanks! If I ever get the time, I'll "fix" this :)All the best,Ole J. Almenningenhttp://www.737cockpit.no