 |  | Basic NEC with Broadcast ApplicationsThe development of computer programs for modeling antennas began in the 1960s when main-frame computers were making advancements. Modeling codes that could run on desktop computers made their appearance in the early 1980s. The design of directional antenna arrays for medium-frequency (MF) broadcasting stations has a much longer history, however,... | | Power Supplies for LED DrivingThe LED has been available for many years now, initially as a red colored indicator. Later, yellow/amber, green and finally blue colored LEDs became available, which triggered an explosion in applications. Applications included traffic lights, vehicle lights and wall-washes (mood lighting). Recently blue colored LEDs have been combined with yellow... |
