Input power and distributed power question

[awneil]

@jremington

One thing that beginners usually miss is that motors and servos draw very large currents while starting up

Indeed.

Another common one is radio-based devices:

NRF24L01 thoughts

Indeed. Radios in general tend to take (relatively) very high peak currents - so any inadequacies in the wiring and/or power supply will cause the supply to "droop" or "brown out". This tends to show up as things which appear to start working but, as soon as the radio first tries to transmit, it all crashes.

Incandescent lamps/bulbs are another example - though a lot less common nowadays.