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LED燈引腳分布圖

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There are 27 user-controllable LEDs on the DE2-70 board. Eighteen red LEDs are situated above the 18 toggle switches, and eight green LEDs are found above the pushbutton switches (the 9th green LED is in the middle of the 7-segment displays). Each LED is driven directly by a pin on the Cyclone II FPGA; driving its associated pin to a high logic level turns the LED on, and driving the pin low t

三肋箱拱橋荷載橫向分布淺析

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三肋箱拱橋荷載橫向分布淺析——箱肋拱橋是工程設(shè)計(jì)中較常用的一種橋型,對(duì)于三肋拱箱,各箱如何計(jì)算受力,困擾著許多設(shè)計(jì)人員。結(jié)合涂乍大橋的設(shè)計(jì),對(duì)三肋拱箱主拱圈的荷載橫向分配進(jìn)行了分析。

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