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consumer cameras typically save the image in jpeg format, and use USB as an interface. Adding USB to your project is not too complex, but handling an image file becomes more difficult because of it's size.
I have no idea what the scope of your project is, but you might consider using a micro...
"brushed dc motor with digital feedback".
a common arrangement is a dc motor with an optical disk mounted on it's shaft. The optical disk has a pattern printed on it that is 'read' by an opto switch. Rip apart a couple of old printers and you should find one.
As for 'C', you need to do some...
I2C does use an address assignment based on the Philips protocol. Similar devices typically have low bits available for sequential addressing within the group. TWI as a protocol does not specify addressing.
the Max3421 will handle the physical protocol, and it's up to your code to satisfy the logical end of things. I've had good success with the max3421 as host controller, running the still image protocol.
given your example, the circuit will be complete, however the earth return will be of very high resistance. Your bulb will not light as your current flow will be very small, if at all
Not knowing your load characteristics, one can only generalize. Impedance voltage dropping would work if your current draws are consisitant, as voltage regulation would follow flow variation. Angle switching with filter would provide much tighter regulation over variable flow rates. Developing...
your 3phase formula is E x I x sqrt(3) = VA. With that you can find your line current. Your phase current is dependant on the arrangement of your coils, but at 480 your likely in Delta, so Iphase current is Iline / sqrt(3).
USB is a packet type transmission. Once you set up your registers and your packet, you deliver it by writing to the appropiate register.
Your packets must conform to the specific USB protocol being implemented, but generally you recieve commands/data from the host, then return data and/or...
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