I have this little setup, which kind of works, but since the Pro Mini and DC motor share the same PSU, upon activating the motor, the Pro Mini loses power for a bit, which causes screwed up timing, and other unwanted side effects.
In the following picture, I've labeled 1, 2, 3; which location would be best to place a capacitor to mitigate the power loss upon DC motor startup?
Is this a case where a capacitor would be useful? If so, what size capacitor would be appropriate? I fail to understand how capacitors help in certain situations, since a 100 uf capacitor is only .0001 of an Amp, if I understand correctly? In that case, most common capacitors would seem useless...