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Re: [N8VEM-S100:123] call for ECB SBC V2 information
Sorry, I only built the early SBC and that was a while back. I'll have to leave
your other questions to someone else.
Jack
----- Original Message ----
> From: Douglas Goodall <douglas...@mac.com>
> To: n8vem...@googlegroups.com
> Sent: Wed, March 16, 2011 10:37:35 AM
> Subject: Re: [N8VEM-S100:123] call for ECB SBC V2 information
>
> @Jack,
>
> Battery BT1. there is no info on voltage ?
>
> In regards to the SBC V2, C24 - C28 appear to be electrolytic, but I
> cannot find (on the wiki or the schematic) any specs ie. Voltage...
>
> Capacitor C1 is listed as C1V5, can I assume this means electrolytic 5v?
> Capacitor C31 is listed as "22uF C1V5", does this mean electrolytic 5v also?
>
> What is the nature of diode D2?
>
> I guess resistors R3 through R8, and R10 are ghosts?
>
> If I understood these mysteries, I could proceed onward with confidence.
>
> Any help would be appreciated.
>
> Douglas
>
>
> On Mar 16, 2011, at 7:10 AM, Jack Rubin wrote:
>
> > Douglas,
> >
> > You're probably referring to the multiple "bypass" capacitors which limit
> > spiking on fast responding TTL logic. They are generally "monolithic" type
>in
>
> > the .1 to .01 uF range. Color varies depending on vendor and packaging spec,
>but
>
> > they are are often yellow-orange in color, though I've often used bright
>blue
>
> > ones as well. On older S100 boards (1980's vintage), these were often
>ceramic
>
> > disk capacitors, same value but physically quite a bit larger, again in a
> > variety of colors. Orange, red and green were common.
> >
> > Jack
> >
> >
> >
> > ----- Original Message ----
> >> From: Douglas Goodall <douglas...@mac.com>
> >> To: n8vem...@googlegroups.com
> >> Sent: Wed, March 16, 2011 8:29:14 AM
> >> Subject: [N8VEM-S100:121] call for ECB SBC V2 information
> >>
> >> Hi friends,
> >>
> >> I am building my first SBC V2. I am already impressed with the card
format
> >> due to its small size and weight. I think these Eurocards are very nice.
> >>
> >> I bought most of what I needed from Jameco, and I am writing up a new
> >> Jameco parts list with part numbers... Most of the parts I understand, but
>I
> >> am a little confused about the capacitors. The few pictures I have found
>of
> >> built up boards appear to have little blue rectangular capacitors, which I
>am
> >> not familiar with.
> >>
> >> It would be very helpful if someone could provide a close-up photo of a
> >> built up board, and some more explicit information about the capacitors.
> >>
> >> I have so many questions about small details of construction that would
>be
> >> answered by a good photograph.
> >>
> >> There are a variety of documents on the wiki about the SBC, but most of
> >> them are two years old, and pre-V2. As soon as I get critical mass on
this
> >> board, I will write up a very complete how-to with explicit parts
lists...
> >>
> >> Can someone help me out a little with this please?
> >>
> >> Douglas Goodall
> >>
> >>
>
>