Hi again, thank you masked!
Here's a new diagram that I've labelled with arrows representing the flow of electrons through the circuit:
I understand that at any given time only two of these bolded arrows will be in action, when A is low and B is high or vice versa, and that the current will go from X -> Q4 -> M -> Q2 -> +.
So, for instance, when the base of Q4 is high, a small current will flow from Q4's emitter to it's base allowing a larger current to flow from emitter to collector, through the motor and from collector to emitter in Q2 (when Q2's base is low) and back to the positive side of the voltage source.
Is that the general idea?
1. Im a bit confused as to the current coming from X up through Q4's emitter and to its base. Where does it go? A and B will be each be connected to a pin of the parallel port (after some protective intermediary which I have yet to investigate). As a result the flow of electrons from paralell port pin A will be heading south to X, which is connected to the parallel port ground pin and the negative terminal of the main voltage source. But this cant be right, as the parallel port ground pin should be positive (defecit electrons) and the negative terminal of the main voltage should be negative (surfeit of electrons). So I think something is quite incorrect in my interpretation. Have I at least gotten the flow of electrons through the main voltage correct?
2. Ive also labelled a branch with 5mA, because my parallel port provides a little less than 5V high and with a thousand Ohms of resistance thats 5mA. Im looking at this now though and because of the above flow direction issues reconsidering the validity of that notion.
3. Im also still a bit confused as to the inverters. If they are to prevent the main circuit from effecting A and B, why could'nt there simply be diodes on each input?
4. Here is a diagram with new diode locations added in:
Im pretty sure thats correct now. And I've added an arrow designating the backwords flow of electrons. How about that?
5. One quick less relevant question: will I be able to switch out different motors in this same configuration, controlling the main Voltage accordingly but leaving everything else the same?
Here's a new diagram that I've labelled with arrows representing the flow of electrons through the circuit:
I understand that at any given time only two of these bolded arrows will be in action, when A is low and B is high or vice versa, and that the current will go from X -> Q4 -> M -> Q2 -> +.
So, for instance, when the base of Q4 is high, a small current will flow from Q4's emitter to it's base allowing a larger current to flow from emitter to collector, through the motor and from collector to emitter in Q2 (when Q2's base is low) and back to the positive side of the voltage source.
Is that the general idea?
1. Im a bit confused as to the current coming from X up through Q4's emitter and to its base. Where does it go? A and B will be each be connected to a pin of the parallel port (after some protective intermediary which I have yet to investigate). As a result the flow of electrons from paralell port pin A will be heading south to X, which is connected to the parallel port ground pin and the negative terminal of the main voltage source. But this cant be right, as the parallel port ground pin should be positive (defecit electrons) and the negative terminal of the main voltage should be negative (surfeit of electrons). So I think something is quite incorrect in my interpretation. Have I at least gotten the flow of electrons through the main voltage correct?
2. Ive also labelled a branch with 5mA, because my parallel port provides a little less than 5V high and with a thousand Ohms of resistance thats 5mA. Im looking at this now though and because of the above flow direction issues reconsidering the validity of that notion.
3. Im also still a bit confused as to the inverters. If they are to prevent the main circuit from effecting A and B, why could'nt there simply be diodes on each input?
4. Here is a diagram with new diode locations added in:
Im pretty sure thats correct now. And I've added an arrow designating the backwords flow of electrons. How about that?
5. One quick less relevant question: will I be able to switch out different motors in this same configuration, controlling the main Voltage accordingly but leaving everything else the same?