I have been trying to learn as much electronics as possible while also learning robotics.
I read about something today that really threw me off.
The concept of electron flow vs. conventional circuit notation.
So it seems that electrons actually flow from negative to positive in a battery through a circuit, not the other way around, as conventional circuit notation shows.
So this is fine, I can adjust to this.
What really is throwing me off however is now that I am going back and studying my $50 robot board, which is working well, and has been the basis for a lot of my tinkering lately.
So I ended up using webbot's version which uses a 9V running through a 5V voltage regulator to power the mcu, and a 6V unregulated source to power the servo's.
OK, so I am fine with that, all makes great sense, and I actually like this because if I need to run something more powerful, say 12 volts, I can leave in the 9V through the regulator, and power my mcu, and I can hopefully replace the 6V with a more powerful source for whatever I want to power like a linear actuator.
So here is where I am getting messed up.
We end up feeding the ground from the 6V battery through a .1uF capacitor, and into the gnd of the mcu, which ultimately connects to the other side of the mcu gnu, and ties into the ground from the 9V battery.
So, if I interpret electron flow literally, it would seem that we are sending electrons from the 6V right to the electrons of the 9V battery, which does not make sense, and even worse, we are sending to much pressure through the mcu.
So, it clearly appears to me that electrons are actually flowing from the + side of the battery, and not the - side of the battery.
Can someone help me to rectify this, and help me understand what I am missing?