Arduino Bluetooth Tutorial HC-05

Bluetooth has been around for quite a while now. Being a common way to communicate with mobile phones, it was only natural to include this protocol in the Arduino arena.   Bluetooth is typically a low power, medium range device, in fact it can reach up to 10 meters. Bluetooth operates on the same frequencies as WiFi, 2.4Ghz.Connections are normally one to one meaning no group communication is allowed by the ...

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Visibility sensor for divers

Planning a scuba dive will be much easier with the data of visibility sensors on the divespot. Things used in this project Hardware components LED (generic) Make sure the LED is bright enough × 1 Adafruit TSL2591 × 1 Adafruit Waterproof DS18B20 Digital temperature sensor × 1 Arduino MKR1000 × 1 Network cable (5m) × 1 Small 2-line wire This is used between the sensor and the LED × 1 Epoxy resin × 1 Software ...

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Reed Switch Interfacing with Arduino

Reed switch is used in many of the real-life applications such as magnetic door switch, laptops, smartphones etc. In this article, we learn about Reed Switch and guide you to Interface a Reed Switch with Arduino. Reed Switch Reed switch is basically an electrical switch which is operated when a magnetic field is brought near to it. It was invented by W. B. Ellwood in 1936 at bell laboratories. It is made up ...

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Tiny Precision Digital Humidity sensor

The new digital SHT3x humidity sensor series takes sensor technology to a new level. As the successor of the SHT2x series it is determined to set the next industry standard in humidity sensing. The SHT3x humidity sensor series consists of a low-cost version with the SHT30 humidity sensor, a standard version with the SHT31 humidity sensor, and a high-end version with the SHT35 humidity sensor. The SHT3x humi ...

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Viseesaw

Viseesaw uses the figure of a seesaw, to show metaphorically the inequality of two physical, conceptual or social realities. Things used in this project Hardware components Arduino MKR1000 × 1 Breadboard (generic) × 1 Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit - v2.3 × 1 Adafruit Stepper motor - NEMA-17 size - 200 steps/rev, 12V 350mA × 1 Adafruit Stepper Motor Mount with Hardware - NEMA-17 Size ...

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RFID Based Attendance System – Learn to Build Yourself

An RFID based Attendance System is a very interesting project which can be used in different places say in Schools to register the attendance of students and teachers, Private organizations to tabulate monthly working hours of employees and automatically calculate salary based on the number of hours registered in the office and other similar kinds of applications. An RFID based attendance management system ...

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Battery-pack fuel gauge with SHA-256 authentication prevents pack cloning

Description The MAX1720x/MAX1721x are ultra-low power stand-alone fuel gauge ICs that implement the Maxim ModelGauge™ m5 algorithm without requiring host interaction for configuration. This feature makes the MAX1720x/MAX1721x excellent pack-side fuel gauges. The MAX17201/MAX17211 monitor a single cell pack. The MAX17205/MAX17215 monitor and balance a 2S or 3S pack or monitor a multiple-series cell pack. To ...

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Program MKR Over-the-Air + Goodies: Voice Control, etc.

Secure OTA via Azure. Control via voice capable UWP app. Includes sample: room thermostat controlled via phone. Things used in this project Hardware components Arduino MKR1000 This is needed for every OTA projects. The components below are needed only for the use case / sample: the room thermostat. × 1 DHT11 Temperature & Humidity Sensor (4 pins) × 1 Relay (generic) × 1 Breadboard (generic) × 1 Software ...

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Smart LCD Brightness Control using Arduino and LDR

Smart LCD  with Automatic Brightness Adjusting Using Arduino and LDR Sensor Here is a simple Arduino project that focuses on adjusting the brightness of an LCD screen whenever there isn’t  sufficient light in a room. The Arduino reads the surrounding light intensity using an LDR sensor.  The room temperature and humidity range will also be displayed on the LCD. The entire hardware of this simple project usi ...

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How to Improve Buck DC Converter Light Load Efficiency with an LDO

Designing a DC/ DC converter that only consumes micro amps of current at no load can be compared to fueling a muscle car with lighter fluid – you may get it to work, but it won’t be easy. High efficiency at full load currents is commonplace in most modern DC/DC converters; however, achieving high efficiency when the load is disabled or disconnected is still a difficult and/or expensive task. Many automotive ...

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Audible Vision

Duffy the mobile robot moves alongside you connected through a "light leash" and alerts you of objects around the path. Story 1)    Background Audible Vision is designed to alert a person of objects around them. The project’s brain is the Arduino Uno, which is wired up with two IR Distance Sensors to tell you how far an object is. Mounted onto the Arduino is a Bluefruit EZ-link Bluetooth shield that connect ...

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Arduino Real Time Clock using DS1307 RTC Module

In this article, we are going to build an Arduino Real Time Clock using DS1307 RTC Module and 16×2 LCD module for display. First of all, let’s see how to interface RTC Module to Arduino. There are different kinds of RTC modules available in the market. We are using the most common RTC module comes named DS1307 IC, an LCD module and Arduino Uno for this tutorial. Interfacing an RTC module to Arduino is prett ...

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