voice unit,volume unit

To provide a more better user interface and more intel-lective manipulation,digital potentiometer is adopted in speech terminal to adjust the volume and LCD contrast.

数字电位器具有独特的性能:体积小,抗震性强,非易失性,可编程,易于与单片机接口,它已广泛应用在自动化仪表等领域中,为了给用户提供友好的界面,使用户操作更具智能化,语音终端采用数字电位器进行音量和液晶对比度调节。

According to the remote control command by sampling and decoding the infrared signal which comes from the remote control,the EM78P156 single chip microprocessor is used to control the volume of the main and bass passage way,and to control the circuits that have four kinds of feature:normal,popular,rock and classic.

采用EM 78P1 56单片机采样及解码红外摇控信号 ,根据摇控码来控制主通道音量和次通道音量 ,以及主通道的四种音质特色 (普通、流行、摇滚、古典 )电

In this paper,a digital controlled volume circuit that contains DAC0832,74LS193 and 555 timer is designed successfully.

介绍一种用数／模转换器ＤＡＣ０８３２、二进制可逆计数器７４ＬＳ１９３和５５５定时器设计的数字式音量控制电路，受控等级可达２５６级，并且外围电路非常简