说明：   我们制作的频率测量计, 合理利用单片机的各项性能, 对被测信号、标准信号进行脉冲计数。本产品能信号频率进行精确测量。 产品的产生, 将极大程度上突出价格便宜, 取材方便、就地, 电路简易的广泛适用特点, 值得推广!
(We produced frequency measurement, the rational use of single-chip microcomputer of the performance, of the measured signal, the standard pulse counting signals. This product can carry out accurate measurement of signal frequency. Product generation, will highlight a great extent on cheap, easy, in situ, the circuit characteristics of simple widely applicable, it is worth promoting!)