From: Jim Brain (brain_at_jbrain.com)
Date: 2008-12-09 06:15:01
A couple questions: 1. Anyone have a reasonable source for the .156" connectors that go on the cassette port? All I can find here is Digikey for $1.72 in quantities of 100 (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=EDC307120-ND) Better yet, anyone have a source for a connector without the mounting tabs? 2. FOr the next batch of uIEC units and C=Key units, I need to design a small pass-through PCB that people can grab onto when inserting or removing the connector from the computer. But, if I have to create a PCB, I thought I might design something on it. Something cheap that I might be able to offer at cost or maybe as a freebie if you buy the other units: 1. My initial thought was a small standalone cassette drive emulator that would hold a small program. For those without a resident wedge that hook RUNSTOP/SHIFT to a disk load, a small program on "cassette" could load and run a menu app or something like it. 2. I considered something like c2n232 with a USB interface, but that starts getting into more money, and I think someone else is running with that project For an option #1 implementation, it looks like an ATTINY2313 is $1.25 + 512kB of FLASH for $.72 + .53 3V3 regulator and a couple of pennies for resistors and caps = $3.00 in parts. I don't know if there is any utility in it (If only the idea for a small wedge is worthwhile, I could probably hardcode a small BASIC wedge and the cassette routines into the 2K of flash on the 2313 and skip the regulator and such, bringing the cost down to $1.50 or so. Any thoughts? I think I need to create the PCB anyway, and I hate to waste the space, as the board shop charges by the area, not the design. Jim -- Jim Brain, Brain Innovations (X) email@example.com Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times! Home: http://www.jbrain.com Message was sent through the cbm-hackers mailing list
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