This takes me back to the days when I was an embedded software engineer. One day I had to write a Linux driver for a custom piece of hardware the company had de

This takes me back to the days when I was an embedded software engineer. One day I had to write a Linux driver for a custom piece of hardware the company had developed. I just couldn't get it to work. While trying to understand what was going on, I literally went down the levels of abstraction until I was measuring voltages with an oscilloscope. Turns out that one of the resistors on the board wasn't properly soldered. It was a good journey from software to all the way down to hardware, but frustrating. Nowadays I develop web applications and I'm happy that I don't have to deal with this kind of problem anymore.