Ashish Choudhary

RFID based Contactless Body Temperature Screening using Arduino and MLX90614 IR Temperature Sensor

Since the outbreak of Covid-19, infrared thermometers are being used as a screening tool to scan the people at Airports,...

MPU6050 Gyro Sensor Interfacing with ESP32 Board

The MPU6050 sensor module consists of an accelerometer and gyro on a single chip. It contains analog-16 bits in the digital...

ESP32 PWM Tutorial: Controlling the Brightness of LED

Pulse Width Modulation (PWM) is a technique that varies the width of a pulse while keeping the wave frequency constant. The PWM...

How to Build an 18650 Lithium Battery Charger and Booster Module

In this tutorial, we are going to build a Lithium Battery Charger & Booster Module by combining the TP4056 Li-Ion Battery...

IoT based Smart Jar using NodeMCU ESP8266 and Ultrasonic Sensor

Previously we built a smart container using weight as a measurement parameter to send alerts. Now in this IoT smart jar, we...

Facial Landmark Detection (Eyes, Nose, Jaw, Mouth, etc.) using Python OpenCV

Detection of facial landmarks is the process of detecting various parts on the face such as the Eyebrows, Eyes, Nose, Mouth,...

Important Parameters to Consider When Selecting a Voltage Regulator

A voltage regulator is a simple and cost-effective device that can change the input voltage to a different level at the output...

NodeMCU Data Logger to save Temperature and Pressure on Thinger.io Cloud Platform

We previously used NodeMCU to log temperature data in the Google sheet. Now here we are going to send data to Thinger.io IoT...

QR Code Scanner using Raspberry Pi and OpenCV

QR code (Quick Response code) is a type of matrix barcode that contains information about the item to which it is attached,...

Crowd Size Estimation Using OpenCV and Raspberry Pi

In today’s world of cutting-edge technologies, Digital Image Processing is growing very fast and become an important part of...