The first time I was in school for electrical engineering (long story), I had a professor who had never worked in the industry. I was in her class and the topic of the day was measuring AC waveforms. We got to see some sine waves centered on zero volts and were taught that the peak voltage was the magnitude of the voltage above zero. The peak to peak was the voltage from–surprise–the top peak to the bottom peak, which was double the peak voltage. Then there was root-mean-square (RMS) voltage. For those nice sine waves, you took the peak voltage and divided by the square root of two, 1.414 or so.
You know that kid in the front of the class? They were in your class, too. Always raising their hand with some question. That kid raised his hand and asked the simple question: why do we care about RMS voltage? I was stunned when I heard the professor answer, “I think it is because it is so easy to divide by the square root of two.”
Continue reading “Root Mean Square”
When I started boxing classes I was told, at my level, I could do just as much good for my form by doing core exercises such as crunches, running, push-ups, and pull-ups for a month as I could by doing the class. I consder habits like safety, cleanliness, and documentation to be habits that influence the quality of hacks much the same way. They’re not really related, and the work can get done without them, but their implementation alone improves the quality of everything you do at the workbench.
The best mechanic I’ve ever met had a well-organized shop. All of his employees wore nitrile gloves when they worked on engines to protect their hands from the chemicals inside. They used ear protection and safety glasses. His rates were low, and the car was always repaired fast. I never had to go back for the same repair twice. He knew exactly what repairs were done, and even kept the parts removed from my vehicle to show me if I desired. I got some of the most fantastic explanations of why parts failed from him. Two blocks down the street was a shop which was unorganized and had double rates. The employees were always sitting on the waiting chairs in the lounge. It took one trip there to never return.
Continue reading “Path to Craftsmanship: Safety, Cleanliness, and Documentation as Habits”
Adafruit industries is doing their part to help the hacker community with their latest addition, a job board. It just went live today so there aren’t many jobs posted, but we expect that to change in the immediate future. you can also post your services offered there, if you’re looking for work. We really appreciate when companies support the hacker community, so we tip our hats to you Adafruit.