[Mark] from SpikenzieLabs was wrapping up a project using an Arduino the other day and found himself in need of a few more I/O pins. He could have added extra circuitry to the project, but he decided ...

本项目所设计的Arduino 万用表应具备以下功能：·具备3个量程的电压表：0-10V，0-30V，0-100V ·具备1个量程的电流表：0-500mA ·具备2个量程的欧姆表：0-1KΩ，0-250KΩ ·二极管，LED的连接性检测 ·LED功能性测试 ·NPN双极结型晶体管的BETA值测量 首先我必须放出这个警告 ...

Have you ever looked at a small development board like an Arduino or an ESP8266 board and thought you’d like one with just a ...