Can a 1µF decoupling capacitor be too much?

Wed, 01 Apr 2015 14:06:12 +0000

To save time, breadboard pins or just lack of knowledge people try to skip adding even one decoupling capacitor to a circuit. Either on IRC or in Forums you can almost always see it coming: “randomly, my circuit stops working” And then, “what do you mean a decoupling capacitor?” question.

While working on breadboard Arduino, I came across some unexpected measurements. Initially, the only capacitors on the breadboard were the two 22pF from crystal to ground and the capacitor connected to RESET for Auto-RESET.

decoupling capacitor on Bald Engineer

Can a 1µF decoupling capacitor be too much?