I'm interested in a backplane, as well, if you have spares. I'm located in the USA.
Thanks! - Alex Jacocks On Mon, Mar 10, 2014 at 12:53 PM, David Fry <[email protected]> wrote: > Hi Anthony, > > just sent US$35.00 payment for one 18 slot backplane via Paypal, > > regards > David Fry > > On Saturday, October 19, 2013 1:19:08 PM UTC+1, Ants Pants wrote: > >> Hi All, >> >> >> for those interested in the 18 Slot Backplane discussed in the "S100 >> Backplane" thread, please find the attached link below to a .pdf with a >> schematic and some board prints, im sorry some of the prints arnt of good >> quality, i had to export as SVG and get to a pdf from there, because kicad >> wasnt printing the proper track widths, a new problem with the updated >> software or just user error??.. so the Top Silk Screen image is a little >> "less sharp", but it will give you the general idea. please note that the >> board uses the same Active Termination as found on the Compupro Active >> Terminator and Godbout 10/11/18 slot backplanes. its the same AT used by >> John Monahan on the S100 board available here. those schematics and >> documentation along with the original spec sheets from Compupro and Godbout >> was used as reference to the creation of this board, so full credit to John >> & Andrew for the running start! >> >> >> >> for those who arnt up to speed on this board, the backplane itself (no >> atx board attached) is a separate board from the ATX board. the kit is 2 >> (two) boards. one 18-slot backplane board and one ATX PSU board. the >> backplane board is a "normal" 18-slot active terminated S-100 bus board. >> The backplane will wire straight up to your +16, -16, +8 and GND power >> inputs of your S-100 compliant power supply and work as a normal S100 >> backplane would, you can use it without the ATX board. For all intents and >> purposes you can throw the ATX board at the cat and forget about it. the >> backplane board is very similar in design to any other active terminated >> S-100 bus board. the ATX PSU board however is a separate board that has a >> 24 pin ATX connector on it (accepting the 20 or 24 pin ATX plug) it has a >> terminal block output that you 'could' wire up to the input of your S-100 >> board backplane IF you 1. did not have the need for exactly +16 -16 and >> +8V. 2. wanted to wire up +5 onto your +8v rail if you ran cards without >> onboard voltage regulators, 3. could wire up the +12,V -12V, +12V to the >> "+16, -16, +8v".. please note on this wiring up +12V to the +8V rail is >> not recommended as your voltage regulators will run hot (it would be best >> to take the +12v and put it into a high current DC-DC converter to give you >> +8v). you have the ability to choose what you put on your power rails. It >> also works prity nice to use your salvaged ATX supply for a lab PSU. the >> ATX PSU (we could call it a sub-card) has: +12v, +5v, +3.3v, GND & -12v >> output on its terminal block. >> >> >> >> The ATX board uses a small PIC microcontroller to act as the "debounce" >> switch (on/off) as its about expensive as the amount of 7400 series devices >> i would have used to put on the board to do the same job. i realize this >> may cause some "Ahhhhh Errrrrr" for some users.. but the source code or >> .HEX file, and programmed devices can be supplied if needed. >> >> >> >> a point of discussion is the thickness of the board, i realize the >> current N8VEM 8 slot board uses 3.2mm thickness to make the board very >> rigid, my biggest concern about this is the ability of the user to use >> standard S100 connectors that have about a 3mm lead coming out the bottom >> after the plastic standoff. i would like users to be able to utilize the >> S100 connectors that some may have been collecting for the last few months. >> i have added extra mounting holes along the board so there is a mounting >> hole on either side of every two connectors. currently the PCB house i have >> sent the design (and use regularly) said 2.0mm was available but not 2.4mm >> or 3.2mm. current pricing for a 2.0mm board is approximately $31ea for a >> 10pcs run. i doubt i would like to try and make the board any smaller at >> this point. but an idea is always to pull off the ATXPSU board and have >> that manufactured separately if there is not a big demand for it. >> >> >> >> i will be taking pre-orders of an initial batch of boards with a Red >> soldermask once the design has been completed and vetted by the "test >> group". (or Andrew might like to run it though his Mnufacturer?) this >> thread is a show of interest and discussion on possible errors and general >> development. Questions and Comments WELCOME! :-) >> >> >> >> >> http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder&; >> param=18%20Slot%20S100%20Backplane >> >> >> >> >> Kind Regards, >> >> Antony >> > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
