A charger gets warm because converting electricity from one voltage to another always loses some of it, and the lost energy has to go somewhere. In a small adapter most of that energy becomes heat inside the case. The warmth itself is normal. What matters is how much of it there is and where it … Read more
A diode is the simplest interesting component in electronics: it conducts in one direction and blocks in the other. What makes it worth learning first is that almost every power supply, every battery circuit and every electronic device you own depends on that single behaviour, and the rest of the device catalogue is variations on … Read more
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