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一般彩电和影碟机能遥控关机,而有些功放机没有遥控功能,同时使用时很不方便,为此本人设计了一个简单的红外遥控开关装于功放机内,且可以直接使用彩电或影碟机的遥控器进行遥控关机,使用很方便。原理图如图1:当主开关(为原功放机电源开关,且要去掉自锁机构)接通时电路工作,无红外信号时接收头③脚为高电平,Q1导通,Q2截止,Q3导通、J吸合,由于J吸合,所以主开关弹回后功放机还可以继续工作。
General color TV and DVD player remote shutdown, while some amplifiers do not have remote control function, while using very inconvenient, for which I designed a simple infrared remote control switch installed in the amplifier, and you can use the remote control color TV or DVD player Remote shutdown, easy to use. Schematic diagram shown in Figure 1: When the main switch (for the original power amplifier power switch, and to remove the self-locking mechanism) connected to work when the circuit, no infrared signal receiver pin ③ pin is high, Q1 is turned on, Q2 deadline, Q3 Conduction, J Suction, due to J pull, so the main switch after the power amplifier can continue to work.