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A DRAM-only version is on my list of projects to do. I'd like to find actually new RAM chips to use instead of buying new old stock and just hoping that they work (given that I don't have a RAM tester).

If you responded to the survey and are still interested in one of these first-batch cables, please send me a direct message. I have 5 cables remaining, including the one which I posted above which already has the connector moved. Looks like 8 people responded to the survey, so it's first come...

@techknight has confirmed that the recreation cable works! It needs a little bit of tweaking to make assembly easier. For example, the soldering rings around the mounting holes for the connector are a bit small and hard to get good solder adherence. I assembled one this morning and...

I did see at least some of what silicon insider is doing on 68kmla. This is an approach I had considered before going down the route of just recreating the existing hybrid. It seems like a really simple idea to stick a 5v regulator in there, but that doesn't take into account the variety of...

Tweaked a resistor and the under-voltage cutout now acts at 5.59 volts, which is much more survivable for a lead acid battery. Turns out that a fair few of these custom resistor values are still available as standard SMD resistors, and their values might not necessarily have to be so precise...

Tested the first prototype of this design (external 12v brick), and it worked - booted my LC III. Barrel jack input (2.5mm center pin) on the left, 12 to 5 buck chip and an inverter hanging off the 5v to get -5. Fuses and protection zeners built in, to safeguard your Mac. The final design...

@techknight has received the cable now, so it's up to his timeframe to move the connector over and give it a shot.

Flex cables in the Atari Portfolio (hinge), PowerBooks (display, SCSI), and many other systems are wearing out, cracking, and becoming unusable. I'm looking for dead flex cables to recreate, basically. There's no guarantee that all possible designs can be recreated, given connector...

It's been way too long since posting a status update here, sorry. The design which uses a power supply that provides 12/5/-5 directly (no down-converters) isn't going to be very affordable. These power supplies have spiked in cost and are near-unavailable due to the parts shortage. We'd be...

Figured out the cause of the -5 volt rail being -6 volts. Counterfeit or bad chips, the whole lot of them. Set up a test circuit on a breadboard, tested about 20 of the chips from my supplier, and none of them were even close. The original circuit hangs the -5 generator off the battery...

In keeping with my latest string of recreations, here's another one. I am working on recreating the 'hybrid module' from the non-backlit macintosh portable because these tend to die and do stupid things thanks to capacitor fluid damage or the coating cracking off of the high precision...

Recently picked up a flock of nine compact macs along with seven keyboards. Five Mac Plus One SE One SE/30 (battery bomb, boo) One Classic (also battery bomb) One Classic II (somehow not bombed, survived the dreaded red maxell) Haven't investigated the Pluses. According to the previous owner...

Production is complete on the cables, and they are currently being shipped to me. Hope to have them by the end of the week, and then can ship them out to my testers.

Glad your portable is working again. The capacitors have been replaced, right? In other news, I just placed an order for a prototype set of 5 of these recreation cables. Chinese New Year is still going on, so it'll probably be some time until production and shipping. Two cables have been...

Currently we're waiting on a second revision protection PCB to be made. I forgot to include the revision in my last order, which means this new revision is probably going to be waiting through Chinese New Year. The order is in, 75% completion, and the new year just started. Previous PCB was...

The test PCB arrived, and we have success: connector footprint matches nicely. I'll be doing final checks on the cable design over the next few days, and will place an order for a set of 5. Then the design can be tested, and hopefully it works.

I have ordered a test PCB (not flex) which is the through-hole connector end of the cable, to verify that the footprint is correct. Once that arrives and is verified, I'll do one last check of dimensions and pads for the ribbon cable ends and submit for a prototype run of these cables. Also of...

The origin of this project was the mAcTX_LC which was released into the public domain on 68kmla. I downloaded the files and made one, but was frustrated that the use of a picopsu wasn't enough by itself, because the picopsu doesn't provide -5v. These files were lost in one of 68kmla's many...

I'd love to be making and selling these, but there are some problems. Only one of the 10 modules I assembled was functional from a flash storage perspective. On most of them, the DRAM works - but the flash for some reason just isn't having it. Some possibilities come to mind: * The PCB design...

As for the breaker popping instantly, the presumption is a short to ground. With everything unplugged (not plugged into the motherboard either), use your multimeter on resistance mode (or beeper mode if it has that) to check in the power supply for shorts to ground from the output voltage...