Security Access using MFRC522 RFID Reader with Arduino ===================================================================== This blog post shows a simple example on how to use the MFRC522 RFID reader. I’ll do a quick overview of the specifications and demonstrate a project example using an Arduino. Description RFID means radio-frequency identification. RFID uses electromagnetic fields to transfer data over short distances. RFID is useful to identify people, to make transactions, etc… You can use an RFID system to open a door. For example, only the person with the right information on his card is allowed to enter. An RFID system uses: tags attached to the object to be identified, in this example we have a keychain and an electromagnetic card. Each tag has his own identification (UID). two-way radio transmitter-receiver, the reader, that send a signal to the tag and read its response. Specifications Input voltage: 3.3V Frequency:...
Arduino Obstacle Avoiding Robot In this tutorial I will show you how to make your own obstacle avoiding robot! We will use the Arduino uno board and an ultrasonic sensor. If the robot detects an object in front of it, with the help of a small servo motor, it scans the area left and right in order to find the best way to turn. It has also a notification LED, an buzzer to play a tone when an object is detected and an button for changing the function of the robot (stopped / moving forward). It's very easy to make it! For this project you will need: Arduino UNO Computer Board Mini breadboard L298 motor driver module 2x dc motors with wheels HC-SR04 ultrasonic sensor Micro servo motor Button Red LED 220 Ohm resistor 9V battery holder (with or without power jack) 8 spacers (male-female), 8 nuts and 8 screws You will also need one big (metal) pap...
Build Your Own Arduino Weather Station In this project, we will be making a weather station that measures air pressure, temperature, rain drop, soil humidity and air humidity using Arduino which save the data for data acquisition! or this project, we will be using: - Arduino boards (mine Arduino Uno Rev3) - DHT11 Humidity and temperature sensor - BMP185 Barometer sensor - Rain Drop sensor module - Soil Humidity sensor module - Breadboard or Custom ProtoShield - Jumper Wire In general, the connections are very simple. Follow the instructions and images above, and you should have no problems. Connecting Rain Drop Module the VCC pin on Arduino’s 5V output the GND pin to Arduino’s GND and the Analog Data to Arduino's analog pin 0 Connecting Soil Humidity Module the VCC pin on Arduino’s 5V output the GND pin to Arduino’s GND and the Analog Data to Arduino's analog pin 1 Connecting BMP185 the VCC pin on Arduino’s 3.3...
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