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假如您给老人或孩子庆贺生日,或在亲朋好友家聚会庆祝生日,能有一个电子音乐蛋糕,会使欢乐的气氛增色不少。下面是触摸式电子音乐蛋糕的电路,您不妨一试。电路原理,它由触摸延时开关 S、IC1和音乐集成电路 IC2组成。IC1工作于稳态,当开关 S 接通,用手触摸感应片 A 时,A 将人体感应信号送入 IC1触发端②脚,触发 IC1翻转进入暂稳态,IC1③脚输出的高电平加到音乐集成电路 IC2的电源端,IC2输出音乐信号驱
If you celebrate the birthday of the elderly or children, or celebrate the birthday party at friends and family, there can be an electronic music cake, will make a lot of joy to enhance the atmosphere. Below is the circuit of touch electronic music cake, you may wish to give it a try. Circuit theory, which consists of touch delay switch S, IC1 and music IC IC2 composition. IC1 work in steady state, when the switch S is connected, touch the sensing piece A by hand, A will send the human body induction signal into the triggering end of IC1 ②, trigger IC1 flip into the temporary steady state, IC1 ③ pin output high added Music IC IC2 power supply terminal, IC2 output music signal drive