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儿童礼物益智小学科学实验玩具DIY科技小制作材料 自制电子蜡烛

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                                 自制电子蜡烛课程课件

电子蜡烛灯(Electonic Candle light),也称为电子LED蜡烛灯,七彩蜡烛灯,由刚开始的简单的模拟蜡烛的外形做出LED灯芯,发展到现在第4代第5代的吹风声控蜡烛灯,功能也越来越强,能投影,能感应声音,感应吹风;色彩越来越多,趋与个性化及礼品化。

实验目的:

电子蜡烛灯原理:利用放大电路将触发信号进行放大,通过可控硅特性截断电流,电路终止
实验认知:可控硅:
 顾名思义,“单向”就是只允许直流电正向通过,“可控”的意思就是
对电流开通还是切断是可以控制的;至于“硅”是指元件芯片所用材料。
三极的功能:
A极:直流电源正极输入
K极:直流电源电流输出
G极:控制极,给它加一定正电压就能使可控硅导通;但是,G极不能
实验报告:

切断已经导通的单向可控硅,因为导通的可控硅内部会形成一股维持电流,使它一直导通下去;只有让这股维持电流化为“零”,才能中止它导通。
在我们要制作的“电子蜡烛”电路中:
点动开关S1:用来给G极加一个正电压;按一下,可控硅就导通了,蜡烛灯就亮了;
触发开关S2:用来把A极和K极短路一下,就在它们短路一瞬那,流过可控硅的电流变为零(原来流经可控硅的电流都从铜片上“绕道”去了),内部维持电流丢失,可控硅断路,蜡烛灯也就熄灭。

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Update time:20240827141009


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