A stepper motor is an electromechanical device which converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence. The motors rotation has several direct relationships to these applied input pulses. The sequence of the applied pulse is directly related to the direction of motor shafts rotation is directly related to the frequency of the input pulses and the length of rotation is directly related to the number of input pulses applied.
Los PIC utilizan, entre otros, dos modos de transmisión serie:
Well, some weeks ago I was thinking about, what can I post?, so I saw around my study room and I saw my old toolbox with my old development boards, for example my Pinguino32, Arduino, Stellaris and other boards that I made when I was studying my career, and among these things, I found Microchip's microcontrollers PIC16fxx and PIC18Fxx. Of all my microcontrollers that I found and I had one with USB interface, and this it's the reason why I made this post talking about USB HID.
History of the Universal Serial Bus (USB) is quite short compare to RS232 for example. Development started in 1994 by effort of six companies - IBM, Compaq, Intel, Microsoft, NEC, Nortel and DEC. The first idea was to develop universal bus simple to use with small and compact connectors (to reduce many connectors in the personal computers). To have a possibility to connect devices such as digital cameras, webcams (or any other devices with big data transfers in a short time), there was also requirement for high transfer speeds.
