Ultrasonic distance measurement using HC-SR04 ultrasonic module + Arduino Pro

Ultrasonic sensors (Ping sensors) are widely used in distance measurement as they are cheap and has a quite good accuracy. I got this cheap ...

Computer controlled automated guided vehicles (AGV) using Parellel port interfacing

As we built a relay board to interface with " parallel port " in my earlier post. Today I'm going to talk about the control s...

RS-485 Communication testing with MAX485

As we know about RS-232 communication protocol, I'm going to try RS-485 communication between two nodes. RS-485 can support multiple s...