Here’s a tip from a wizened engineer I’ve heard several times. If you’re poking around a circuit that has failed, look at the resistor color codes. Sometimes, if a resistor overheats, the color code ...

To learn resistor color codes, I find it better to practice on example resistors rather than try to memorize the values of each color with mnemonics. This script generates SVG images of 3 and 4-band ...