Since the Arduino can't 'toggle' the ground pins at all (at least that I understand?)
Yes it can, it can switch a pin between 5V ans ground.
You need to keep the current below 30mA otherwise you need a transistor to get more current.
Since the Arduino can't 'toggle' the ground pins at all (at least that I understand?)
Yes it can, it can switch a pin between 5V ans ground.
You need to keep the current below 30mA otherwise you need a transistor to get more current.