这里向大家介绍一个有趣的LS—56系列婴儿哭声集成电路,它能发出逼真的婴儿哭声,可用于布娃娃玩具等。电路原理如附图所示。IC为南京赛利发电子有限公司生产的LS—56系列婴儿哭声语音集成电路;V为IC外接功放三极管,可用9013型硅NPN三极管,β≥100;R_1为IC外接振荡电阻,其阻值大小影响哭声音调高低,R_1阻值大,哭声音调低沉,反之,音调高尖;R_2消除 Here to introduce an interesting LS-56 series baby cries integrated circuit, it can send realistic baby crying, can be used for rag dolls toys. Circuit principle as shown in the figure. IC is produced by Nanjing 赛 Lee Electronics Co., Ltd. LS-56 series of baby cry voice integrated circuits; V for the IC external power amplifier transistor available 9013 silicon NPN transistor, β ≥ 100; R_1 for the IC external oscillation resistance, the resistance The size of the impact of crying pitch low, R_1 large resistance, crying tone down, on the contrary, the pitch high; R_2 elimination