I have been agonizing over wall details to try and make the perfect (but practical) wall for a residential home that balances moisture (mold risk), thermal bridging, air tightness, and constructability. Here is what I came up with, and got some feedback on reddit of. While I will probably not go with this detail (it […]
The Catlin Truss Wall Assembly Read More »
While working on two multicopter drone related projects, I was distracted by the idea of an ultra endurance drone build, inspired by this discussion. There are really three steps to drone efficiency/endurance 1) keeping everything as light as possible 2) using high efficiency power regulators, motor controllers, and motors 3) highly efficient propellers (which is
Drone Propeller Efficiency and Noise Test Read More »
There are some things humans need which don’t entirely make sense. Exercise is one example. It takes lots of energy to do exercise, so it seems counterintuitive that we would need what might be considered a waste of energy. Another example is sunlight. Sunlight is known to cause cancer, indeed we use it for sterilization
Light for Health, and a Custom Sun Lamp Read More »
I have been racing bikes since my early teens. Cycling is a really fun sport, but having suffered no less than three concussions crashing in criterium racing, and also having been hit twice by cars while training, I have moved away from the sport a bit. I tried triathlons, but don’t like swimming enough to
A Duathlete in the Wind Tunnel Read More »
On my latest bike build, a Trek Speed Concept, I wanted to use Shimano Dura-Ace brakes, because the levers and brakes are a bit nicer than SRAM, with SRAM AXS shifting, which I prefer for being more completely wireless. I particularly like the integrated button the Shimano shifters have. It seemed like it would be
How to run Shimano TT Brake Levers with SRAM AXS Shifting Read More »
Demand forecasting is exactly how it sounds: forecasting demand. This can take many forms but the most classic example is predicting how many products will be sold by a retailer on each particular day. This forecasting is in turn used to drive business value in various ways. The most common is better inventory management, but
A Different Look at Intermittent Demand Forecasting Read More »
In this project, I made myself a business card. It is a solar-charging RGB LED flashlight as well. In this post I’ll talk about the design and some of the testing done, in case you should like to make one yourself. A couple of years ago, I saw a ‘this business card runs Linux’ post
The Solar Powered Business Card Read More »
If you follow the world of green energy, you will know there is a basic need to store excess energy from wind and solar in order to provide power when there is no wind or sun. Such systems also offer the potential for microgrids – ie being able to keep small parts of the grid,
A Quick Feasibility Study on Home Pumped-Hydro Storage + Geothermal Read More »
Over the last several weeks, box after box has been arriving at the farm. My dad had decided to start brewing beer, in the name of testing the hops he grows. It is rather silly as no one in my family drinks alcohol. I saw a better opportunity in the pile of equipment he had
Homemade Root Beer Soda, Yeast vs CO2 carbonation Read More »
For a few months I’ve been working on a projects for which I have been working on a rather ‘fancy’ circuit board. But three weeks ago I had the desire to build another circuit board, a much simpler one – which would be my first to actually get into production. And it turned out to
A First Printed Circuit Board Read More »
