I am desiging a small experiment board for hobby use. I am taking my time and searching around. Mostly, I am striving to understand the what and why. Hence an earlier question by me on leds and resistors. ( https://www.avrfreaks.net/index.p... )
Now, I've read the Atmel note on reset circuitry, and they suggest a pull-up resistor on the reset and a capacitator. After google'ing I understand the resistor (explained here: http://www.seattlerobotics.org/e... )
But I do not understand the need for the capacitator. Why would I want a cap on the reset? Isn't a cap meant to combat spikes in the system in case there is a sudden draw on power? I can't imagine that to be an issue on a reset.