收集了十多个单片机在线编程器电路图（PDF+SCH），包括串口、并口、USB口等，很多都是当前流行的在用的电路。-Collection of more than 10 ISP(PDF+ SCH), including serial, parallel port, USB port and so on, many of which are currently popular circuit in use.

MCU51 读取DS18B20温度的模块-MCU51 read DS18B20 temperature module