显示键盘智能控制芯片ZLG7289A在数控切割系统中的应用

具有SPI串行接口,可同时驱动8位共阴式数码管(或64只独立LED),还可连接多达64键的矩阵键盘,单片即可完成LED驱动显示、键盘接口全部功能的智能显示键盘控制芯片ZLG7289A的功能和特点。根据数控切割系统对环境和工作人员的要求,以ZLG7289A为核心设计的键盘、显示电路结构更为简洁,功能更加完备,可靠性高,且使用方便,适于推广。实践表明ZLG7289A相对于常用的8279在使用中占线少,外围器件少,驱动电流大,抗干扰能力强,方便好用。文中详细介绍了在数控切割系统中该芯片的硬件接口和软件设计方法,并指出了在编程时需注意的几点事项。     

液晶显示模块FM12232C的原理及其在数控切割系统中的应用

本文介绍通过扩展I／O口实现FM12232C液晶模块与单片机的接口。通过自制字库．用单片机实现汉字和数字的显示。在数控切割系统中,应用该液晶模块实现人机界面的正确显示。该图形点阵液晶显示模块具有功耗低,体积小、价格低、使用方便、接口简单等特点,适于推广,能广泛使用于一些小型的数控系统、自动控制、监控和测量仪器中。     

Enrichment of microplastic pollution by micro-nanobubbles

Microplastic pollution has become a global environmental concern. It has been reported that microplastics are easily accessible to a wide range of aquatic organisms and ultimately enter the human body along the food chain. They pose a severe threat to ecosystems, organisms and even human health due to their durability and persistence. However, how to reduce microplastic pollution still remains a challenge in terms of scientific techniques and policy-making. There is currently still a lack of effective methods for microplastic recycling and removal. Luckily, a new technique, micro-nanobubbles (MNBs), may provide a possible and highly effective method to enrich microplastic pollution: their great advantages^[1] include a high specific surface area, long lifetime and ability to adsorb microplastics of the same size and hydrophobicity. Then they further adsorb on larger bubbles such as microbubbles or millimeter bubbles and float to the water surface together. In this study, we present a new method using MNBs to enrich microplastic pollution with high efficiency. Two types of microplastics, millimeter-scale plastic fragments and microplastic particles, were chosen as the model microplastic pollution systems to study the enrichment efficiency of MNBs on microplastics. Results showed that MNBs can efficiently enrich these microplastics. The enrichment efficiency increases with flotation time until a maximum value is reached. It is proved that MNBs not only collect the microplastic pollution but also reduce detergent use in domestic laundry sewage. This is because detergent, as a surfactant, is easily absorbed on the surface of MNBs and can be collected together with the microplastic pollution. Our research has demonstrated that the MNB technique could be promising for use in microplastic recycling and reducing detergent pollution in daily life.     

新型通用异步收发器MAX3100在单片机系统中的应用

介绍了MAXIM公司的新型通用异步收发芯片MAX3100的功能特点、引脚含义、控制指令及工作原理,给出了MCS-51系列单片机系统中,MAX3100在串行数据通讯应用中的设计实例。对MAX3100和另一种常用的可编程串行通讯接口芯片8251A进行比较,提出几点MAX3100在使用时的注意事项,最后给出几点实验结论。     

用C8051F020主控的液晶显示模块FM12232C及其应用

介绍了C8051F020单片机和图形点阵液晶显示模块FM12232C的性能特点，分析了在单片机C8051F020主控下FM12232C的硬件接口电路和软件设计方法，利用该方法可成功实现对液晶模块的控制和汉字显示。