Help celebrate the opening of the new BMOW store with a Cyber Monday 10% off sale! You get a discount, I get more people trying the new store platform, and everybody wins. From now until the end of Monday, all…
Just in time for the holiday shopping season, the BMOW store has been completely rebuilt using an entirely new technology platform! This brings an armload of major improvements, including new payment and shipping options, the restoration of Australia and New…
When I first got involved with electronics, I assumed that my most important tool would be an oscilloscope. I bought a Rigol DS1074Z (mini review here), a nice four channel 70 MHz scope, but I’ve rarely used it during the…
In the world of Apple II disks, there are two major types of disk controller cards: the original Disk II controller (and clones), and everything else. Both have their place. The “everything else” category includes the Apple 3.5 disk controller…
The Wombat ADB-USB input converter is now back in stock at the BMOW Store. Thanks for everybody’s patience during the manufacturing delay. The Wombat is a bidirectional ADB-to-USB and USB-to-ADB converter for keyboards and mice. Connect modern USB keyboards and…
Here we go! Beta testing kicks off today for the Yellowstone universal disk controller for Apple II. Yellowstone is a replacement for the Liron disk controller, the Apple 3.5 disk controller, and the standard Disk II controller, all rolled into…
Good news! Kay Koba at Kero’s Mac Mods store is now selling pre-packaged ROM-inator kits for the Macintosh Plus, Mac 512Ke, 512K, and 128K. This is a recreation of the original Mac ROM-inator kit that I designed in 2015. The…
In my attempts to resolve some logic level problems with the Yellowstone Tester, I decided to take a crude approach, and reduce the 5V supply to about 4.7V using a simple zener diode voltage regulator. From my previous tests with…
The Yellowstone tester is suffering from the logic level blues. I made a blundering error in its design, which I only discovered now. Like most of my projects, the tester uses a mix of voltages, with the MCP23S17 port expanders…
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