This paper discusses the fast charge strategy due to the fact that one of the limitations of the lead-acid batteries is the long charging time. The fast charge strategy uses two phases in order to reduce the charging time and obtain high performance without reduced the lifetime battery. In the first phase is used constant high current and in the second phase is used current pulses controlled by a PID controller.
DMX512 is the standard protocol used by lighting equipment in theatrical and entertainment data distribution systems. This paper describes a complete hardware and software solution for driving a high brightness 70 pixel RGB LED matrix from a computer and synchronized with environmental music, in addition to multiple running modes and possibilities achieved. Further possibilities of the developed device running as universal automation controller, are also mentioned.
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