Tag
debugging
2 articles.
- Measuring supply ripple: the ground clip is the antenna
A 3-inch probe ground lead turns a switching spike into ringing that is not on the rail. Tip-and-barrel, coax, bandwidth limits, and the null test.
- Bringing up a board that does nothing
A first-power-on procedure in the order that finds faults fastest: current before voltage, rails before reset, reset before clock, clock before code.