I screwed up the PCB’s

I have the serial connector on backwards, and since I HAVE to send out for new boards a fixed a few nitpicky things that would not effect operation or performance, but it bugged me.

Gerbers going out tonight, take about 3 weeks. Meanwhile I have cases in hand just gotta machine them with the jigs I have planned out but have not made quite yet.


PCB’s in hand

Pocket Serial host PCB’s are in my hand. First time using Itead studio and I am quite happy with the result. After problems were sorted it took about 3 weeks to get them, and they look pretty darn good. The boards are 54mm x 89mm, just slightly too large to fit in the 50x100mm price category. If I shaved 2mm off each end of the board they would not fit on the enclosures supports and rattle around, so I got the slightly more expensive 100x100mm service, and instead of 10 boards, they sent me 12 (yay), which actually dropped the price by ~20 cents a unit.

Next up I have to make a solder stencil, and then I can paste, then reflow the parts at my workplace while off the clock (and wearing a sign saying I am not on the clock so leave me alone)

Here is a scanned image.

Parts Delay City

Ordered PCB’s, there was a problem with my file outputs cause they were not clear on what they needed other than “send us gerbers, heres an eagle template that doesnt work in altium” got that worked out… They should be slow boating it in the next few days

Ordered enclosures last week, got notified of a 6 week lead time UGH, so close yet so far, oh well more time for software refinement.

VSH update

After the sanity check I noticed that I forgot to add the LED(s), and that there was some high frequency oscillation in the voltage regulators. I reduced total capacitance in parallel to help squelch that. I made a PDF of that schematic and decided “eh screw it” and moved on to reworking the SMD version

but I forgot to add the LED’s (DOH) so yea, lesson learned, make multiple saves when doing different versions. Tween the two there is not much difference, the SMD version has a schottky diode for input protection, and a low dropout 5 volt regulator to account for the dirt cheap 6 volt wall warts I had bought.

The 3.3 volt regulator changed as well to a smd version but after that its all the same parts, just in smd packages (so a atmega328p-pu changes to a atmega328p-au type of stuff)

Here is schematics as of now for both, keeping in mind the though hole version does not have the indicator led’s in place … fix that later



Quick picture, note at my employment it is a sin to make a PCB without all 3d models populated, im not at work so its missing models

Pocket Serial Host Enclosure in hand

I procrastinated for the longest time after picking out this plastic box, but I didnt really need to have it on hand. I have a crappy PDF with all the mechanical details, and I slipped that info to our ME at my work who clapped his hands and provided me with a 3D cad model in what seemed to be an instant, that I could load in Altium to make sure my physical parts would not crash into the case.

You got to love mechanical engineers, it would have taken me a week to make something close, this guy does a primitive model in 10 min meeting all the critical measurements while on a phone call.

Anywho, I finally ordered one for a sanity check, physical parts vs physical parts, and it arrived today. The box is an off the shelf pactec HM series and is listed in “PC BONE” color. If you look at the website it shows a fairly tan box, but in reality the box is lighter in its tan color. Sitting on top of my //c it doesn’t look too far off.

(color under daylight CFL)

(picture under incandescent lights  but compare the reset key to the box, dead on, just give it 20 years lol)

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PSH Starter Schematic and some Code

So I (finally) started drawing schematics tonight, its been one big delay after another in osgeld Labs, some of it unavoidable some of it very avoidable. Since that’s the way its working I would like to announce 180$ preorders (kidding guys) no I would like to announce a basic starting point schematic and firmware for the hardware tinkerers.

First a rant on KiCad. KiCad is a open source EDA (electronics design automation package) you draw a schematic, assign footprints, make a pcb, ship it off and get back a printed circuit board. Though I have been using it for years, tonight I just about lost it… every simple durn thing turned into a MAJOR pain in the BUTT! Thats it, I am done, when peoples software just gets more and more broken over time, I dont have time to screw with it anymore, its not worth the stress, and this downhill slide has been going on for a long while it seems.

After taking 3 hours to do something that would have taken an hour min in Altium (another EDA that cost thousands of dollars, we use at my work) I was trying to export the schematic to PDF, SVG, any darn thing where it would loose half my work. So in a nutshell screw that, and for now you will have to deal with a crappy screenshot.

Word of warning, I have not actually made hardware off of this schematic… it should be correct (I kind of do this for a living), but I don’t guarantee it. Its also very basic hardware and there will be more things added into it in the future, mostly basic things like an LED, a switch, maybe a couple jumpers, but a biggie is a Real Time Clock … if I ever settle on one.

Software is also in a very basic state. this is not my current build, but its one that works as a VSDRIVE host, and nothing more. Since this is all in a very basic state, and not at all close to what I consider ready.

I will not be held responsible if you hook it up and blow something up… so dont save your tax forms on it, and accept personal risk to your hardware if you tinker with it.

(click for large version)

To compile software you need Arduino 1.01 (should work with 1.02 and 1.03 I will check in the near future) software and fatSDlib library installed in the libraries folder of wherever you install arduino.


you also need the apple II software, from the last 2-3 revisions of ADTpro

Pocket Serial Host Gets a Power Supply

As I gear up for a run of 10 of these devices, one of the major issues has been to power the silly things. As this grew from a //c to a //c+ to an every apple ][ project it became apparent that there was no way I could tap a port on the computer for power, so a plug in wall-wart was needed.

These things can be retarded expensive, like this 24$ radio shack, transformer based hunk of crap. BUT I found a awesome deal on sale at electronic goldmine on a switching model wall-wart. Switching means its stout (enough) in the current department, while being compatible with 120-240 volt AC input, and compact … bout the same as any normal modern celphone charger.

Its probably a garbage design, but nothing worse than any other Chinese stuff that comes packed in with various gadgets of the modern age

VSDrive minus PC (long winded intro)

A little while back, there was a flurry of activity on the comp.sys.apple2 group that started innocently enough. User Riccardo found some software that allowed you to serve a prodos disk image (up to 32MB) from a PC to your apple via serial port, but he could not get it to work.

Wanting something just like that, I jumped in with a little google magic, found the original authors website …


But discovered that it was (only slightly) unfinished, and pretty much hard coded for some models of the IIGS. Luckily David Schmidt of ADTPro fame took an interest, and very quickly the Virtual Serial Drive was included in ADT 1.2.4 (along with an Ethernet version as well)

While its not perfect, its darn handy for many programs and it gives us //c owners an option for mass storage!

Even-though I was tickled beyond pink, I wanted to cut the PC life support, and I did just that.

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