Now I've made a PCB to fit the 24-pin pcb carrier.
The RB5X looks like it expects a 2732 or 2716 in the socket.
First, before that, one option is just use a 2732 in the DIP version of
the carrier:
http://shpws.me/SGYn
The problem with that is re-writing the chip. You can't unbend the legs
very many times, so you want a way to connect the module to a
programmer, and you can't get the actual socket any more. The most
practical way I can think of is just get a dip-24 socket with wire-wrap
legs and some machined round male pin headers. Stick the pin headers in
the socket and stick the socket upside down into the programmer so the
long wire-wrap posts are pointing up. Wedge the module between those posts.
https://www.digikey.com/short/z48wn5w3
https://www.digikey.com/short/f1zfc4q0
But if you want to get fancy with the pcb version of the carrier...
https://github.com/bkw777/Teeprom/blob/master/MEE2732.md
This has a 28C64, with a switch on the A12 line to allow using all 8k of
the chip in the form of 2 4k banks. The edge contacts are 2732 pinout.
The chip can be programmed using a test clip. You program the whole 8k
at once the same as if the chip were in the programmer by itself.
You'll need an SOIC-28 test clip and some dupont wires and a dip socket
to program that.
I'm still waiting for a print of the pcb version of the carrier, so I'd
keep waiting for that confirmation before actually ordering anything.
But I think this is it and I think it's just a matter of waiting a few
more days for the proof now.
Also, don't feel bad if you never actually get around to playing with
this. I fully realize that a grand total of approximately zero people
will ever use this. The 28-pin version has some use, and I just wanted
the other sizes fully supported as well just because, and this served as
an actual example for the 24-pin size.
--
bkw
On 5/21/21 10:21 AM, Scott McDonnell wrote:
Brian,
I wanted to say thank you for doing this.
Scott McDonnell
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Date: Thu, 20 May 2021 07:01:39 -0400
From: "Brian K. White" <b.kenyo...@gmail.com>
To: m...@bitchin100.com, m100@lists.bitchin100.com
Subject: Re: [M100] Other things that used the Molex
Message-ID: <65e0dea9-24a4-5254-07a2-4269fb22e...@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
On 5/18/21 7:28 PM, Scott McDonnell wrote:
> My other hobby is robotics and one of my robots is an RB5X. This uses
> the same style Molex socket, but with fewer pins, for custom application
> software. I have been trying to adjust the scad model, but haven't
> nailed it yet.
>
> Last month, I ran across two of the M100 compatible Molex carriers on
> eBay and snagged them. Figured they may come in handy one day.
I've updated my scad model to generate both DIP and PCB versions of the
carrier, and in all 3 sizes 24, 28, & 32-pin, and added 24, 28, & 32-pin
versions of the pcb template.
So, if you want to use a DIP-24 27C32, use Molex78802_DIP_24.stl
If you want to make a PCB version, use Molex78802_PCB_24.stl and
Molex78802_DIP_24.kicad_pcb
For the .stl file, have it printed using SLS at Shapeways or Sculpteo or
anyone that has SLS.
(copy the whole PCB directory to a new name, rename
Molex78802_DIP_24.kicad_pcb to the new project name, and start working
in there.)
https://github.com/bkw777/Molex78802_Module
--
bkw
--
bkw
