Author Archives: djeimser

I had to take some time off from documentation and my software development learning journey. Since my last post: – Kasper and I finished the wooden ghetto blaster… – I’ve been contracting solo, taking on residential electrical jobs – Doing my taxes as a business owner, for the first time. – Went to Fosdem inContinue reading “Hindsight is 2020”

Leo is my most welcome distraction from productivity. He’s my youngest son and he makes people happy with his presence. It’s hard for me not to look up from my laptop with a smile after about 45 rapid-fire questions about Dyson spheres and nuclear fusion… Things that I scramble to google for, while he’s askingContinue reading “Leópold”

I’d forgotten how convoluted USB protocol and power regulation can be, and how the Raspberry Pi doesn’t usually help matters. After I powered the Raspberry Pi up, with the external SSD plugged in, for the first time, I ran sudo fdisk -l command via SSH. It showed a list of the SD card drives (rootContinue reading “USB is Hell”

So I was just telling my son, Kasper that the psu we installed in his box had 3 different voltages that he could use: 3V, 5V, 12V, but I wasn’t sure which color is which. The following schematic should help with that. As we can see the green wire (fourth from top-right) is the oneContinue reading “Cut the yellow wire. No wait…”

So I assembled my pi 4 case, fan and heat sink. The fan just connects to 5V+ and GND pins. I used pins #4 and #6 Creating the SD card was no problem. I downloaded the latest raspbian lite, popped the SD into my Ubuntu laptop. I used Ubuntu’s “Startup Disk Creator” tool to… createContinue reading “Headless Pi 4 & enclosure assembly”

I went to Memory Express yesterday to take advantage of their Boxing Day sale. It was ok. I got what I intended to get at a slight discount. It took about half an hour / hour to stand in line to get to the cashier. Not really worth it. But the staff are nice andContinue reading “Be grateful”

Well, the box is done. The woodworking part, anyway. Kasper has some sanding and painting ideas, which I fully support, in spirit, but for my part, the enclosure for the weird car stereo system is done. We had to plug it in for the joy of… well, plugging in the strange thing that we justContinue reading “Another boxing day”

Today I built a box, with my son, out of wooden boards from home depot. We didn’t quite manage to finish it, but we made decent headway. The box has a top lid with hinges and a built-in desktop power supply, which we’ll be using as a 12V rectifier for a car stereo. What’s thisContinue reading “Kasper and the box”

I’ve been traveling a bit recently, visiting friends and family. Before my initial departure I had about a bazzillion and 1 thing to do. I’m currently waiting at the airport for my next flight. I’m considering changing this blog into a webpage devoted to my bazzillion and 1 excuses for not attending to one ofContinue reading “Seattle”

I created this blog and share it with people I respect in order to create an element of accountability of my learning journey. Right now I’m writing this in my coffee break in an industrial bakery in Reykjavík where I’ve been contracted as an electrician. That’s my day job. I’m a certified master electrician andContinue reading “Accountability”