Arduino + motors. Exorcism of ghosts. How exactly?

Question

Arduino

Khabrovchane and their sympathizers, stupid ay nid help.

Can you explain how to properly connect spark quenching capacitors to a
collector motor? And then the interference is such that the Arduino
blows its head off, ghosts are buggy to the sensors (that is, it reacts when there is absolutely no reason for it), and in general, the devil knows what is going on.

Motor description: http://www.pololu.com/catalog/product/1117

Onboard voltage:
7.2V Arduino UNO + DFrobot 1A Motor Shield

Answer 1

Such a small motor, in theory, should not give strong pickups, solder the capacitor to power the motor, parallel to + to plus, - to minus. A 47uF capacitor should suffice. By the way, if there is a motor speed control (PWM for example), I'm not sure what will work. Observe polarity!

Answer 2

Thanks for the advice, we'll try.
It doesn't give a particularly strong interference, but it's still unpleasant. I still want to get the most reliable information from the physical world, and not try to bypass glitches programmatically.
Yes, the shim is just being used, and refusing to control the speed is somehow not ice /

Answer 3

and even better - use a separate power source to power the motors;)