Timer can use a different frequency pulses of different frequency pulse amplification by the speaker drive circuit filter, will emit different tones.
利用定时器可发出不同频率的脉冲，不同频率的脉冲经喇叭驱动电路放大滤波后，就会发出不同音调。
A timer called a clock releases precisely timed electrical signals that provide a regular pulse from the processor's work.
一个称作时钟的计时器准确地发出定时电信号，该信号为处理器工作提供有规律的脉冲。
In this article several operation modes of the 555 timer applied to the pulse Modulation (PM) and their corresponding operation characteristics are expounded.
本文阐述了555时基电路用于脉冲调制(PM)的几种工作模式及其相应的工作特点。
应用推荐