For some time we’ve caught rare glimpses of small, rabbit-like animals who seem to be living under our front porch. We’ve seen little, round ears bobbing past the window, footprints in the snow, and during one hot summer I found a dead chinchilla in the garage – the poor thing couldn’t take the heat. Continue reading Chinchilla Cam: Installing the Raspberry Pi Camera Module and OpenCV
Ever wonder what happens when people from A.D. 2100 want to indulge a nostalgia about the early 21st century? Wonder no longer. I’ve posted my Highly Fictional, Future Historical Walking Tour of Hillsboro, Oregon, in which a hapless kid trying to fix his cell phone accidentally eavesdrops on the future.
Having recently finished reading Clifford Smyth’s excellent book, Functional Design for 3D Printing, I was anxious to try out his method of cutting a design into parts and gluing those parts together after printing. Continue reading Super Glue and 3D Printing: a match made in heaven
Part of John Foshay’s 1873 letterIn going through old family papers, I happened on a letter from my great-grandfather, John Foshay, to his wife, Martha (Whealdon) Foshay. It’s a letter composed mid-trip on a journey from Albany Oregon to California along what is now Interstate 5. Continue reading Travel is Broadening, 1873
In my previous post, I covered the mechanical construction of the scale. In this post, I finish assembling the scale, calibrating it, and installing it.
After painting I put feet on the scale so it won’t soak in water spilled on the floor.
…then bolted the Arduino 101, Load Cell, and Load Cell Amplifier to the bottom plate. Continue reading Dog Water Bowl Scale, Part 3: Final assembly and installation
In my previous post, I started working on the scale. In this post, I finish the woodworking, and painfully re-learn the woodworker’s adage: “Measure twice; cut once”. Continue reading Dog Water Bowl Scale, Part 2: Measure Twice; Cut Once
Now that my Dog Bed Weight Scale is sending data, I’m going to have a go at a water bowl scale. The idea is that, like the bed, the bowl will periodically send its weight to a cloud. This data should tell me when Pippa drinks, when we refill her bowl, and (maybe) how much she drinks.
The work-in-progress sources on Github, contain the beginnings of the Arduino 101 Sketch, Bill of Materials (Parts List), mechanical design/construction details, and a day-by-day project diary. Continue reading Dog Water Bowl Scale, part 1: initial design work
In my previous post I changed the uploader app to run when the Raspberry Pi turns on, and installed the scale under Pippa’s dog bed. In this post, I get interesting data from the scale.
The scale has been running for a little over a week now, and has been surprisingly reliable for a first version. There is some sort of bug in which, every few days, the scale stops supplying new data BLE notifications to the gateway. I plan to refactor the scale and gateway to avoid that, but that’s another post.
Today I looked at the data and saw some very interesting things. Continue reading Dog Weight Scale part 16: Data!
In my previous post, I wrote the Raspberry Pi Node.js code to upload data from Pippa’s dog bed scale to data.sparkfun.com. This post covers how to make a Node.js program run automatically when the Pi is turned on. Oh, and at the end I installed the finished scale under Pippa’s bed.
By the way, the nRF Master Control Panel (BLE) from Nordic is the perfect tool for debugging Bluetooth Low Energy devices and messages. It understands a pile of standard Bluetooth data types,as well as the Physical Web, so it’s a quick way to find out whether your Arduino project is sending the right data. Continue reading Dog Weight Scale part 14: uploading data to data.sparkfun.com