My son got one of these Leap Frog toys a few years ago as a gift. He enjoys playing with it very much. I am not sure how much counting and learning he is doing but it makes funny noises and sings to him so its a lot of fun. Recently the unthinkable happened. It … Continue reading Make a Custom Membrane Keypad for Arduino
For the longest time my home electronics projects have been done on a 60" x 30" folding table in one of our spare bedrooms. My growing collection of project boxes, spare parts, and equipment finally started to put stress on my furniture - particularly my table. I spent embarrassingly too long fretting over whether to … Continue reading “Lab” Upgrades
Found a link to one of the many "big huge awesome" projects that we started in ACM@UIUC back in the day. I'm pretty sure this page is the only thing that actually came out of this project. 🙂 I think (hope?) that I've gotten a little better at completing things (retro pc project and this blog not … Continue reading Ancient History: Let’s Build Our Own Console!
Arduino + Tamiya + PS2 Controller = Arduino Tank!
The time has come to clear some space on my breadboard so I can continue to build out the remainder of the system. I've collected a few prototype boards from Futurlec by tossing a few in each order over a few months. I bought a few different flavors of boards (PROTO777, PRBRDLG, and EXPBRD) to … Continue reading From Breadboard to Protoboard
I've been blocked on making progress on the retro pc project due to bad reads from the ROM. The seemingly simple snippet of boot code should light an led wired to to the i/o ports (any port). section .text resb 0x7F0 org 0x7F0 start: mov al, 0x1 again: out 0x10, al jmp again When … Continue reading Debugging stuck bits
I've become more and more annoyed at having to export images from my Rigol scope to a flash drive plugged into the device. I'd much prefer to capture signals and images directly from my Macbook. Unfortunately, the PC software that comes with the Rigol -- Ultrascope -- does not run on Mac OS X. Boo. … Continue reading Using Ultrascope for Rigol DS1052E
I've spent the last few weeks working on my retro pc project. The first step with the 8284 seemed to go well but the trouble began when I tried wiring up the 8088. I wasn't getting anything remotely close to the expected boot sequence. According to the datasheet and The 8088 Project Book a few clocks … Continue reading Sometimes it is a bad part… sometimes.
Several months ago, I purchased a copy of Robert Grossblatt's classic The 8088 Project Book in hopes of building a retro 8088 computer. My plan was to scavenge the parts from craigslist, ebay, and a couple Seattle area used computer junk stores. My adventures locally didn't result in many parts though I did have much … Continue reading Starting a Retro PC using The 8088 Project Book
I ordered one of the $4.30 LaunchPad eval kits from TI a few weeks ago. It was immediately on backorder but to TI's credit, when they had them, they shipped them quick -- overnight FedEx from what I can tell. Nice. I've only downloaded the tools - Code Composer Studio and IAR Embedded Workbench - … Continue reading MSP430 LaunchPad arrived today