这遥控测试仪此处设计的使用555计时器的单个模式操作。该电路可用于检查任何遥控器的工作。如果遥控器正在工作,则在蜂鸣器和LED发光下产生蜂鸣声。如果不起作用,他们会保持沉默。
此处设计的遥控测试仪使用555计时器的单一操作模式。
远程测试仪使用三个关键组件。
红外接收器:
该项目中使用的红外接收器是TSOP1738。它是一种红外探测器的中心频率38 kHz的进出红外光。该红外接收器的特性是,当它检测到约38 kHz的红外信号时,其输出端子会降低(0 V),并且当不存在红外信号时,它保持较高(5V)。
Transistor:
使用相同类型的晶体管圆形检测器短而且工作也一样。
555计时器:
555计时器用于单个可单位的操作模式,如圆形检测器短。
成分:
1。555计时器
2。电阻(4K7,100R)
3。Capacitor (47uF, 1nF)
4。红外接收器(TSOP 1738)
5。5V蜂鸣器
6。LED
7。晶体管(2N3906)
手术:
555定时器的输出连接到一个5 v Buzzer and a LED. When a remote control is brought near the infrared receiver and a button is pressed in the remote, signals at 38KHz goes out of the remote (if the remote control is in working condition). This signal is received by the infrared receiver and gives out its output terminal LOW (almost 0V which is less than 0.7V). Now the base of the transistor gets less than 0.7V and this activates the transistor. This in turn triggers the 555 Timer as the transistor connects the trigger terminal of the 555 Timer to the Ground by connecting its emitter and collector terminals. Hence the output of the 555 Timer goes high making a sound in the buzzer and glows the LED. So when the Buzzer sounds and the LED glows, it can be understood that the remote control is working.
相反,如果遥控器不起作用,红外接收器将不会接收任何红外信号,并且它将给出其输出端子高,这将不会激活晶体管,因此不会触发555个计时器,并且蜂鸣器不会听起来和声音和LED不会发光。这种情况使我们了解遥控器无法正常工作。
项目源代码
电路图
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