Hello all -- As I strategize how to layout a stripboard for a small robot (my child's robot), my readings included Atmel's "AVR042-Hardware Design Considerations." With some follow-up research on this forum, and looking at the Arduino Uno R3 schematic as a reference example, I am a bit confused on which options are best suited to my application. I will be using the 1284P-PU chip, with peripheral motor driver and motors with magnetic/Hall effect shaft encoders, obstruction sensors, &c., on a roughly 3" x 4" (75x112mm) stripboard. The robot has a wheelbase of 85mm, kinda small. My modest understanding of these matters would call this a "noisy environment."
What is new to me is the inclusion of a series resistor (330R) on the reset switch to GND, and a couple other things, described by Atmel in AVR042. This series resistor is not found in the Uno R3 schematic (best as I can read). There is found in that schematic though a diode in parallel with the 10kR pull-up resistor. This diode was added in the Uno R3. Also, no external capacitor in the schematic, from reset pin to GND, as recommended in AVR042.
My aforementioned confusion arises primarily from what I have found in topic responses on these forums, and tutorials on which I have heavily relied to get me to this point.
What are the considerations given to the varied responses I have found on these forums? And, secondly, given my application, what is recommended?
Many thanks in advance for your kind responses. Mark