On 3/8/20 6:45 PM, Dave Everett wrote:
On 8/03/2020 9:04 am, Brian K. White wrote:
On 3/7/20 4:42 PM, Dave Everett wrote:
On 8/03/2020 8:27 am, Brian K. White wrote:
I think you want a carrier rather than a socket then ?
As it happens, I also have over 100 carriers too, and you can have
some no problem. But you can also get carriers 3d printed new. There
are at least two STL files out there publicly to get carriers 3d
printed from on-line services any time you want for about $5 each. The
carriers are easy since they are just a chunk of plastic. The sockets
are hard because you can't just 3d-print the pins.
I'll try printing one, thanks mate.
Dave
Here's the carrier for printing.
https://www.shapeways.com/product/QF7XZHLJV/molex-dip-28-chip-carrier-78802-0010?optionId=65447013&li=marketplace
Here's the STL file to get it printed somewhere else besides Shapeways.
https://www.thingiverse.com/thing:2904190/files
That's not me or my model but it looks good to me.
The carrier I designed holds a PCB not a DIP chip.
If you want to try to get it printed elsewhere, you need to know that
you have to use SLS printing. It means laser sintered nylon powder.
Everything else is either too inaccurate or too fragile. I have no idea
who offers SLS printing in AU. I think both Shapeways and Sculpteo ship
world wide, but surely there must be someone closer to you. Steve Adolph
is in Canada and we managed to find a Canadian shop for him for the
carriers for his new REXCPM coming out soon. You might try a site called
CraftCloud. They aggregate several print services into a single search
site. You upload the STL file, set your location and currency, select
the type of printing and material (SLS nylon), and they show you quotes
from different suppliers.
But like I said in another email, you probably do want a socket also so
that you can re-write the rom without bending the pins again to get the
chip off the carrier. So, if you want a socket anway for reading &
programming, it's nothing extra for me to toss in a few carriers.
And that other "Meeprom" thing I posted with a pcb is just an option.
Kind of fancy but I like it for my Model 100/102/200's. Maybe it makes
more sense for 100/200 etc because they have a non-standard pinout that
the programmer does not support. A socket still doesn't work without
also some form of wiring adapter, and at that point the test clip is
simpler.
But for a PX-8 or a tandy model 600, since the pinout is standard, then
as long as you don't mind using 27C256 chips and a UV eraser, it's
simple to just plug a socket in the programmer, and you can read/write
the rom without taking it off it's carrier.
--
bkw
