Hello friends! Today we will connect a DS18B20 temperature sensor to an Arduino Uno and display its reading in the Serial Monitor and on a 20 x 4 LCD. This is a useful first project when you want a digital temperature measurement without building an analog amplifier or calculating an ADC reference voltage. The original project used the Dallas 18B20 name and demonstrated the result on real hardware. We will retain those photographs and the demonstration video while making the wiring, library installation and measurement handling clearer. In particular, we need to distinguish a sensor's resolution from its accuracy and explain why its power connection matters. We will begin with one externally powered sensor on Arduino pin D2. Once that works reliably, the same data line can support several ...
Hello friends! Today we will connect three HC-SR04 ultrasonic sensors to an Arduino Uno. A single forward-facing sensor is useful for a basic distance demonstration, but a robot may also need information from its left and right sides. The original project used this arrangement to discuss obstacle detection and movement between two walls. If you have not yet obtained stable readings from one module, begin with Interfacing an Ultrasonic Sensor with Arduino . Here we will build on that measurement function while addressing the main new issue: several sensors can hear one another. Adding more input pins does not automatically create independent acoustic measurements. We will preserve the original right, left and front pin assignments, trigger the sensors sequentially and report whether each re ...
Hello friends! Today we will connect a real HC-SR04 ultrasonic sensor to an Arduino Uno and display distance on the Serial Monitor. Our earlier Proteus library tutorial introduced the simulated sensor, and the simulation examples explored different input conditions. This article moves to the four-pin physical module and the practical details of a measurement. Libraries HC-SR04 Simulation Libraries Latest library: Ultrasonic Sensor Library for Proteus V2.0 (October 2026): HC-SR04 with real TRIG and ECHO timing, Simple and Advance devices, test tools and an Arduino demo Other distance and motion sensors: JSN-SR04T · Sharp IR · TF-Luna LiDAR · VL53L0X · PIR HC-SR501 · RCWL-0516 · IR Obstacle FC-51 Helping Tools Serial Monitor Advance : a serial terminal window for the UART of your board Seria ...
