RFID is an acronym for Radio Frequency Identification and refers to a technology whereby digital data encoded in RFID tags or RFID cards (the one you use it in your Office or College ID Cards with RFID) that are captured by a reader via radio waves. RFID is similar to barcoding in that data from a tag or cards are...
An RGB LED is an integrated LED with all three primary colors in it, RED, GREEN and BLUE. Using an RGB LED we can make all other colors by mixing a proper amount of these three colors. The amount of voltage applied to each pin specifies the amount of colors it emits. This is called additive mixing.There are two...
16×2 LCD is an alphanumeric display that can show up to 32 characters on a single screen. You can display more characters by scrolling the texts one by one. We have already seen how to connect LCD Display directly with the Arduino using 4bit and 8bit modes in our previous tutorial. But those two modes will utilize many numbers of GPIO Pins...
GPS was widely used in Marine navigations mostly in olden days. After that, governments decided to provide access to all users in the world to use GPS navigation. Nowadays it is used widely by all people on their Mobile phones, Car Navigation Systems, Drones, Asset Tracking systems in logistics, Anti-Theft for motorcycles, etc. Almost all of us might have...
ThingSpeak is an Open-Source IoT application and API to store and retrieve data from Hardware devices and Sensors. It uses HTTP Protocol over the Internet or LAN for its communication. The MATLAB analytics is included to analyze and visualize the data received from your Hardware or Sensor Devices.We can create channels for each and every sensor data. These channels...
SIM800L Module is a small GSM/GPRS Module and ideal for small ideal projects. The module supports quad-band GSM/GPRS network, available for SMS and GPRS message data remote transmission. SIM800L is advanced than its previous SIM900 modules.There are other multiple versions of SIM800 is available. The choices of models depend upon the application needs. But SIM800L is used widely for common applications....
DFPlayer Mini (or) MP3-TF-16P Module is a tiny low-cost mp3 module with inbuilt Amplifier. You can connect a 3-Watt Speaker directly to the Module. Additionally, you can use an audio amplifier like PAM8403 to boost the Audio signal. It has an SD Card port and reads the MP3 files from the SD Card. This MP3 Module can work standalone...
NRF24L01 is a Low power 2.4 GHz wireless RF Module from Nordic Semiconductors. It can operate with baud rates from 250 kbps up to 2 Mbps. If it is operated in an open space with a lower baud rate, it can reach up to 300 feet. So it is used in short range applications like Home Automation, Toys, Gaming...
MQ Gas Sensor use a small heater inside with an electro-chemical sensor. They are sensitive to Gases.Whenever the concentration of gas increases the resistance will decrease (but the current flow will get increased). It leads to change in voltage and it is read at Analog out pin which tells how much gas is concentrated in normal Air. This varied analog...
NodeMCU is a popular Wi-Fi based Development board in IoT Projects. Its predecessors are ESP-01, ESP8266-12E. The NodeMCU is based on ESP866 Series.As the name suggests it is a development board, it contains additional circuitry for Power supply USB, Communications, etc (Similar to an Arduino Uno is built around ATMEGA328 IC). Hence this board has built-in voltage regulators to...
