Search Result: Arduino UNO - Page 31 of 34

Hello friends! Today we will use the DS18B20 temperature sensor with Arduino Uno in Proteus and display its reading on a character LCD. The sensor is sometimes shortened to 18B20 in project descriptions, but DS18B20 is the part name we will use when selecting the device and checking its specifications. We will begin with the sensor connections, add a 20-column by 4-row LCD, and write a sketch that requests a temperature conversion before displaying the result. We will also handle a missing sensor explicitly instead of presenting an error value as though it were a real temperature. The Proteus model lets us change the simulated temperature using its controls. It does not measure the room around your computer. This makes it useful for checking the program and display workflow before building ...

Hello friends! Today we will learn how to restart an Arduino program deliberately and, more importantly, distinguish a real microcontroller reset from simply starting our application logic again. These operations can look similar on the Serial Monitor while leaving the hardware in different states. For the main example, we will use a classic Arduino Uno with an ATmega328P and its watchdog timer. We will also revisit the two approaches in the original tutorial: connecting an output pin to RESET and calling a function pointer at address zero. Both need important qualifications before they are used in a project. The original wiring image is retained below for reference, but the recommended example does not need that jumper. Remove any output-to-RESET connection before following the watchdog p ...

Hello friends! Today we will connect an Android phone to an Arduino through USB and exchange commands in both directions. This is useful when you want a wired control panel, a portable instrument display or a direct connection without configuring Bluetooth or Wi-Fi. We will start with one classic Arduino Uno and a small LED-control sketch. After that, we will revisit the original two-Arduino arrangement, which lets a computer monitor the bytes travelling through the phone connection. The second board is a debugging aid, not a requirement for Android communication. The important details are the phone's USB host support, the board's USB interface, permission to open the device and a clearly defined message format. Once these are understood, we can build a useful connection without treating U ...

Hello friends! Today we will build an intelligent energy-saving demonstration using an Arduino Uno, two doorway sensors, an LCD and controlled loads. The idea is to count completed entries and exits, then switch the model room's loads according to that count. The interesting part is not simply turning a relay on. We need to recognize direction, handle an interrupted crossing, avoid counting the same person repeatedly and decide what to do when the count becomes uncertain. We will develop those rules before looking at the complete program. This is a controlled educational demonstration. Two narrow beams cannot reliably count a crowd or guarantee that a real room is empty. We will use low-voltage demonstration loads and make the limitations visible rather than treating an imperfect counter a ...