Raspberry Pi NES Build

Over the years I’ve played around with the Raspberry Pi to see what I can get it to do. I have limited programming skills and rely heavily on the opensource community and how-to documents.

The most successful projects I’ve done with the Raspberry Pi have revolved around using them as DNS and VPN servers. I also have them running with a monitor and wireless keyboard/trackpad combo in the basement utility room and garage. The screen on my phone to look up something in those rooms gets to be a little small and I’m usually using the phone as a flashlight so having a full sized monitor comes in very handy.

One of the things I’ve wanted to do for a while is build a portable gaming machine. Something that could easily go in luggage and look decent to the TSA as it gets scanned. I tried putting something together in 2013 with a Raspberry Pi B first gen, but struggled with lag and the controller setup. As luck would have it, I’ve had an extra Raspberry Pi 3 Model B sitting around I’ve been trying different projects with, but haven’t found the one until I read about RetroPie again.

Continue reading

TacitTheremin: A spatial awareness tool for the blind.

What’s this strange thing?  This is the TacitTheremin, a device which helps blind people understand their surroundings using ultrasonic sound ranging.  Designed to work in tandem with a cane, this device allows users to get a greater sense of what’s around them at ranges that exceed a cane and in any direction in which its pointed.

Inspired by the Tacit, an invention made by Grathio Labs, the TacitTheremin is a modification of that design concocted right here at the Omaha Maker Group.  It mounts to the wrist, receives distance measurements from an ultrasonic sensor, and outputs sound to the user through a speaker (low tones for far distances, high tones for short distances).  It ranges from 16 feet down to 3cm, 5 times per second.

See the original Tacit here.  The TacitTheremin is released under a Creative Commons BY-NC-SA License.

This whole project started as an attempt to replicate a Tacit (because the idea is just so darn cool), and in the end it turned out to look quite different, with different coding as well.  You can read about the epic journey in detail, and make your own for a friend (on an individual project basis).

But enough technical stuff.  See it in action!

Currently, this prototype is being field tested by a local Omahan named Mike, who happens to be blind.  Stay tuned for a followup video.

You can reach me with any comments, questions, or concerns here.  Just be sure and put “TacitTheremin” in the subject.  Alternatively, feel free to comment below!





Printer Parts – Heater Tube

Jason notes that I forgot to post a photo of the other Mendel parts I’ve been building for the MakeryMendel.  Below are photos of a stainless steel heater tube (the one that I didn’t ruin by welding a drillbit to the inside) as well as the “order form” that Brandon sent me. His drawings aren’t anything fancy, but we seem to have gotten the job done.  For scale, the bushing in the photo is 1″ OAL, and the threaded rod heater is 1.5″ OAL.  The picture with the fire is a prototype plaster bushing that we were testing.  It’d probably work, but we dried it a bit too fast and it developed a nasty crack.

BrandonSpec (Medium) Plaster Heater