这是个基于VB的温湿度采集界面，主要是三部分：用户密码输入界面；温度采集显示，列表显示（存入数据库）；数据查询界面-This is a based on VB collection interface of the temperature and humidity, mainly of three parts: the user password input interface Temperature gathering shows that list (deposit database)

串口输入输出实例，磁条器，密码器 详细介绍通过串口进行通讯-Serial input and output examples, magnetic devices, the password device

计算机与单片机通信。结合了银行使用的密码输入键盘，介绍如何使用单片机控制键盘设备与计算机串行通信-Communication between computer and single chip microcomputer. Combined with the password input keyboard used by banks, describes how to use microcontroller serial communication with the computer keyboa

登录程序，输入密码与账号才可以登录，如果输入错误超过3次，则不可以登录，自动锁定-Login program, enter the password and account before they can log in, if you enter the wrong more than three times, you can not log on, automatic locking