I have been messing about with electronic circuitry for almost four decades. I recently came across an early example of my work. The device is a digital event counter built around classic 74xx series logic. A chain of 74190 decade counters feed a set of 7447 decoder drivers and seven segment LED displays. A plastic project case with switches and connectors reminds me I have been building little devices for a very long time.
A digital event counter built when I was fifteen years old.In some ways the unit is very similar to one of my more recent builds. Perfboard and point-to-point wiring are still standard construction techniques. The technology may have changed across the years, becoming far more complex, but some parts have remained the same.
I am preparing to release a design under the Open Source Hardware Association definition. By releasing a design this way you allow the electronic maker community to freely share and use the design. When following the community rules for open hardware, you can mark your equipment with the open source hardware logo. The logo itself is released under a Creative Commons licence (CC-SA) and is likewise free to copy and use, if you follow the rules.
While the OSHWA website links the logo in KiCAD and several other formats, it does not provide the logo in Eagle format. Off to the web to find an Eagle library with the logo… Hmmm… Found one, but it has issues.
The Open Source Hardware Association logoThere are a couple versions out there on the web. The one most commonly found to was created by NBitWonder. This has a couple issues… While it is very faithful to the official logo it is built from thousands of apertures. Running the CAM processor on it chokes, and chokes hard. While the PCB may take a couple seconds to process the CAM without it, place this logo on the PCB and be prepared to take several minutes to process the CAM. With the NBitWonder version the file sizes grow significantly as you would expect. My GenPIC PCB overlay Gerber file grows from 16kb to over 250kb to accommodate the logo.
As the TMT contested case drags on we continue to watch. Thanks to the efforts of the staff of Nā Leo TV the entire proceedings are streamed live. Several of the latest witnesses for the University are Hawaiian supporters of the telescope project, it is these voices that I am most interested in hearing.
Retired Judge Riki May Amano presides over the TMT contested case hearingIt is when the questioning begins that things get ugly. Question after question challenges the integrity of the witness. The questions challenge their personal values as if to say “You are not Hawaiian.” Over and over the questions were repeated, each successive question designed to attack the cultural identity of the witness…
“Where did you grow up?”
“How old were you when you learned that?”
“Who taught you that?”
“When was the last time you were on Mauna Kea?”
“When did you last worship on Mauna Kea?”
“Where did your family worship?”
“Do you pray to Poliʻahu?”
“Who are the parents of Poliʻahu?”
Residents of Waimea know to brace for the Christmas Parade. For an evening half the island population descends upon this little town. Days ahead of time, the parking spots along the street, far from the store’s front doors, normally empty, will be full of pickup trucks as people stake out their favorite spot to watch the parade.
The crowd along the parade route for the 2016 Waimea Christmas ParadeThe main road closes at 5:30pm, important to know as this closure cuts the ring road around the island. By this time the crowd has grown to a size that is quite surprising on this island. Are there actually that many people here?
This year Keck and CFHT cooperated on a float. Really a decorated truck like most entries in the parade. We handed out glow sticks and glow bracelets to the kids along the parade route. walking along with the group is fun, of course I have a camera along.
Aboard the CFHT and Keck float in the 2016 Waimea Christmas ParadeAfter the parade it was time for a star party… Only one issue… Calling it a star party is a bit of a misnomer. There were no stars, there were no telescopes. Two ‘scopes did get set up briefly, then the rain began. With the ongoing winter storm there were only a few glimpses of the moon through the clouds, otherwise nothing to see. The telescopes stayed in the vehicles.