need help with HDDJ Turning an old hard disk drive into a rotary Answered
I'm new to instructables.com and found a very interesting guide.
but I'm not a electric technican, and don't understand all steps.
I understood how to open the HDDJ and i can sold the wires correctly. i know that the motor is used as a dynamo, so that I can measure the energie produced.
My first question is why are there 4 soldingpoints? - Are there 4 magnets which produce the energie, and every magnet has a soldingpoint.
I got a problem with "amplifying the output"
"One of the lines from the HDD is used as a reference, and is connected to the (-) inputs of all the comparators. The other three lines are connected to each of comparators (+) inputs. Not shown in the schematic, but also important, are the power supply pins of the comparators. The negative supply is connected to ground, while the positive supply is connected to Vcc (in our case +5V)."
Which wire I have to use as the reference? Maybe why?
What is Vcc? an energie source, like a batterie?
If I amplified the output which microcontroller I could use, can I use any mikrochip, or do I have to use a special?
and how do I install the firmware?
Maybe someone could help me with my questions. Maybe someone who is able to speak german so it would be a lot easier for me.