Category Archives: Electronics

A washing machine story

Posted on June 15, 2026 by Matthew

Picture this: your Electrolux washing machine doesn’t power on. You check the power to the user interface board and there is no voltage. Obviously, an issue with the main board. You pull out the EWX14 main board and it has … Continue reading →

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How do wires work? (electromagnetic picture)

Posted on December 4, 2025 by Matthew

I made a video about the electromagnetics of wires which you can watch on YouTube here. At this point there is no blog post to go with it, but if I have technical notes to add, I might add them … Continue reading →

Posted in Electronics, Physics | Leave a comment

Amplifiers in the real world: a case study

Posted on January 12, 2024 by Matthew

I encountered an interesting problem recently. As part of a personal project related to magnetic resonance, I built a small coil set and pre-amplifier: The pre-amplifier is located on the tiny green PCB; the signal received by the inner coil … Continue reading →

Posted in Electronics | 1 Comment