Be careful with the water analogy. It will fails just when you need it the most.
BabyGeezer:
my question is, what is happening (at that junction) when the Arduino resets.which way is the water flowing ?
OUT of the Arduino INTO the servo ??
It is not important. Not enough current/water flowing into Arduino will reset it. If the servo is really power hungry it may "suck current out of Arduino" (its decoupling caps) shortly. So both may cause the Arduino to reset.
BTW in electronics "junction" implies a p-n junction.
ChrisTenone:
Be careful with the water analogy. It will fails just when you need it the most.
could you give an example where it does ?
it might actually help me in understanding the differences better.
Smajdalf:
It is not important.
Not enough current/water flowing into Arduino will reset it. If the servo is really power hungry it may "suck current out of Arduino" (its decoupling caps) shortly. So both may cause the Arduino to reset.
well, for my understanding, it is.
i have thought about it, and with the help of this statement;
when the circuit can't supply the required current, the voltage drops.
this is now how i see that "(shared) intersection" ;
even if the servo didn't "suck water away" from the Arduino, the servo drawing the majority of the current (water flow) available, means the Arduino gets left with a trickle - and so, by Ohm's Law - the voltage also drops - and thus you get the Arduino being supplied with only, say, 4V - thus a reset.
Smajdalf:
BTW in electronics "junction" implies a p-n junction.
ok thanks, will have to keep that in mind.
Strictly speaking Ohm's law has nothing to do with this since Arduino is not a resistor(*). But I think you understand it right: not enough current -> not enough voltage -> BOD reset.
(*) Ofc you may imagine Arduino as a resistor with wildly fluctuating resistance. It may help you grasp some concepts but it is somewhat circular logic - you use Ohm's law to calculate Arduino's apparent resistance from supplied voltage and current to use Ohm's law to get the voltage or current...
Q
ChrisTenone:
Be careful with the water analogy. It will fails just when you need it the most.
Just keep them separated physically, in my experience water and electronics don't mix so well...