图1的电路是由可编程的语音合成器芯片 IC7(HT82231)组成的动物叫声发生器。它是一种八声片,该电路只设置了六种动物(马、猫、山、青蛙、小鸡和 MOO)的叫声。为了提高电路的使用性能,采用触摸式开关,控制发声。IC7②、③脚上外接的 R9和VR1,可控制其内部振荡器的频率;⑦～(15)脚是动物叫声选择(分别接地)端;(19)脚是动物叫声输出端。输 The circuit of Figure 1 is an animal sound generator consisting of a programmable voice synthesizer IC7 (HT82231). It’s a eight-bladed sound that sets only the sounds of six animals (horses, cats, mountains, frogs, chicks and MOOs). In order to improve the performance of the circuit, the touch switch, control the sound. IC7 ②, ③ pin connected to the external R9 and VR1, can control the frequency of its internal oscillator; ⑦ ~ (15) feet is animal sounds choose (respectively, grounded) end; lose