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Archives for Arduino Projects

Simple 5V DC Power Supply

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In any electronic products or projects there is always a source of power for the system to work. This is called a power supply. The source of this power can come from different sources like the mains AC voltage, a battery or even from a renewable power source like a solar panel wind turbine or fuel cell to name just a few. The most common source of power is usually the mains AC, with this power, we need a transformer to convert the 220V 50Hz mains or the 120V 60Hz if you are living in the United States of America to a lower voltage required by the electronic circuit, this can be typically between 6V and 12V when 5V regulated DC is needed. In this article we are going to design a simple 5V DC power supply that can be used to power your Microcontroler projects using the 7805 voltage regulator.

Digital Thermometer using Arduino and LM35 Temperature Sensor

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Temperature sensors are very important in many projects especially in temperature logging devices and alarms. In this article we are going to design a digital thermometer using Arduino Uno. This digital thermometer is built around the LM35 which is a precision integrated-circuit temperature sensor whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. Its output changes by 10 mV per °C so there is no need for calibration. It can measure a wide range of temperature from −55 to +150°C

Breadboard Regulated Power Supply 5V/3.3V

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In any electronic product or project there is always a need for a source of power for the system to work. This is called a power supply. To get power hassle-free to the power lines of a breadboard can be a challenge, you will need a convenient and safe way to get either a regulated 5V DC or 3.3V DC depending on your application  on your breadboard power rails. In this project we are going to design step by step a simple  Breadboard power supply that takes power from a 6 to 15V DC power supply and outputs a selectable 5V or 3.3V regulated voltage using a switch. This board can be easily inserted into a breadboard using a .1" (0.254 cm) headers mounted on the bottom of the PCB. Pins labeled VCC and GND plug directly into the power lines of a breadboard.

Arduino Shield Tutorial – Make Your Own Relay Shield

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Arduino shields are boards that can be plugged on top of the Arduino PCB to extend its capabilities. This makes prototyping with Arduino plug and play. Instead of soldering or wiring external devices or sensors, you can simply hook your board with a shield. This speeds up development time even for absolute beginners. This is a practical tutorial, we're gonna build a fully working complete Arduino Relay shield, we're gonna go through all the steps

Arduino Shield Tutorial – Make Your Own LCD Keypad Shield

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Arduino shields are boards that can be plugged on top of the Arduino PCB to extend its capabilities. This makes prototyping with Arduino plug and play. Instead of soldering or wiring external devices or sensors, you can simply hook your board with a shield. This is another practical tutorial, we're gonna build a fully working complete Arduino LCD Keypad shield, we're gonna go through all the steps, we'll start from scratch explaining and simulating the circuit diagram in Proteus, then we're gonna create a Printed circuit Board with Eagle but any PCB design software can also be used, then we're gonna generate the manufacturing files to manufacture the PCB with PCBWay our favorite low cost PCB manufacturing company and finally were're gonna test the operation of the shield with a simple Arduino sketch. 

Automatic Temperature Control System using Arduino – Flowcode

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An automatic temperature control system has the ability to monitor and control the temperature of a specified space without human intervention. This project uses an Arduino UNO to automatically control the temperature of an area. This area could be a small plant, a house or any place or device that require a controlled temperature like an incubator (egg) for example. The desired temperature setting is entered using a keypad. The temperature of the area is measured using an analog temperature sensor. The Arduino reads the temperature continuously and compares it with the desired value. If the desired value is higher than the measured value, then the heater is turned ON to heat the area. If on the other hand the measured value is higher than the desired value, then the fan is switched ON to cool off the area until the required temperature is reached. If the temperature reaches a certain critical value 40⁰C or higher, the buzzer will sound continuously and an LED will blink until the temperature deceases below 40⁰C. An LCD display shows the measured temperature continuously. This project can be used as a base for Final Year Project For Engineering Students