Hi3510内部有一个ARM9的处理器，该产品一经推出就在市场引起很大的震动，虽然现阶段Hi3510在D1的处理方面还有些不成熟，但是由于是标准H.264的产品，相信在市场方面会逐步获得行业的认可-Hi3510 internal an ARM9 processor, the product, once introduced in the market created a big shock, although at this stage D1 of the processing in the H

无源蜂鸣器内部不带震荡源，所以如果用直流信号无法令其鸣叫，必须用2K~5K的方波去驱动它。在树莓派上实现无源蜂鸣器的鸣响(The passive buzzer does not have a shock source inside, so if the signal can not be called with a DC signal, it is necessary to drive it with the square wave of 2K~5K. The sounding of a pas