Connecting FSBus cards?

[Guest]

Hi everyone,I was just looking at the pictures on http://mikkila.wabbits.org/fsbus/doc/photos_e.php and can't figure out how you could connect more than 4 key cards or 7 segment cards etc to the Com card. The com card has 5 10-pin plugs on it and one of those goes to the serial port, so that leaves 4 plugs. Then on the key cards or 7 segment boards they also have only one plug. I thought that you could daisy chain the boards together to reach the 32 card limit, so I must be missing something.Anyone care to enlighten? :)One other question...I'm compiling all the things I will need for the Com card on the mouser.com site and can't figure out what a 100n resistor is (From http://mikkila.wabbits.org/fsbus/doc/parts_e.php)Can anyone explain?I know I know, "If you have to ask, then you shouldn't be building it"Thanks for all your help,Spencer

[Guest jpcxcf]

>Hi everyone,>I was just looking at the pictures on>http://mikkila.wabbits.org/fsbus/doc/photos_e.php and can't>figure out how you could connect more than 4 key cards or 7>segment cards etc to the Com card. The com card has 5 10-pin>plugs on it and one of those goes to the serial port, so that>leaves 4 plugs. Then on the key cards or 7 segment boards they>also have only one plug. I thought that you could daisy chain>the boards together to reach the 32 card limit, so I must be>missing something.>Anyone care to enlighten? :)Think like your connecting harddisks one end has a connector and you can connect more devices with more connectors attached to the ribbon cable.Regards,Pedro

[Guest MikePowell]

**I know I know, "If you have to ask, then you shouldn't be building it**Not at all! One of the great pleasures of this hobby is learning new things.Mikewww.mikesflightdeck.com

[Guest Glenn Weston]

G'day Spencer, I think you are referring to C7 on the list, this is a Capacitor 100nF or 100 Nano Farad.As stated just make ribbon cable with multiple connectors along it, you can then just plug more controllers along the cable, the 4 connectors on the comm board are for convenience more than anything, instead of having 1 really long cable with 32 connectors which would have to snake all around the joint you can have 4 shorter ones with less connectors on each cable, for example one with 6 connectors, another with maybe 10, another with 5 & the last one with say 11 which will allow connection of 32 total controllers.Cheers Glenn.

[Guest]

Thanks everyone, it all makes sense now... Now I have to find one of those Capacitors, I think I ordered the wrong one. Oh well... :)Thanks again for making it all clear,Spencer

[Guest raflyer]

The caps are .001 PF here in the states, You won't find any reference to "nano" in american parts houses. DOn't know why other than i went thru the same thing when I built mine.Rob

[Guest LeoL]

Spencer, you'll probably have better luck looking for a 0.1 uF "micro Farad" cap instead of 100 nF "nano" or 100 000 pF "pico" equivalent.Rob, I think you got the conversion wrong. I often do myself. I hope I got it right or I have a bunch of circuits with the wrong caps on them. :-eekConversion table to keep in mind.1 pF = 1 X 10-12 F1 nF = 1 X 10-9 F1 uF = 1 X 10-6 Fand so 1 nF = 1000 pF and as such 100 nF will be 100000 pF and not 0.001 pF. Time to get that soldering iron out Rob and replace those caps. ;-)http://ourworld.compuserve.com/homepages/g_knott/elect5.htm-Leo

[Guest raflyer]

Sorry about that, .01pF , I had orginally installed 103caps but it wouldn't work. Rob