The Electronic Cash Register (ECR) keeps track of sales transactions quickly and effectively. An abundance of PLUs (Price Look Ups) and department keys accommodate a variety of merchandise items. This means a faster, more accurate check out process a

bpm精确时钟，没有比这更精确的了-bpm precision clock, there is no more accurate than this was. . .

利用近红外探头pulsesensor和LCD1602，利用德州仪器的msp430g2553开发板，显示脉搏波-Using near-infrared probe pulsesensor and LCD1602, use TI s msp430g2553 development board, showing the pulse wave