Foot Step Power Generation Circuit using Piezoelectric Sensor
When we provide mechanical stress to the piezoelectric sensor it generates voltage. The output of the piezoelectric sensor is in AC form. For converting it from AC to DC we are using a full bridge rectifier.
Check out the circuit details: https://circuitdigest.com/electronic-circuits/foot-step-power-generation-circuit-using-piezoelectric-sensor
ESP32 Internet Clock
To minimize hardware requirements we will make Internet clock without using RTC module. This is more accurate as compare to RTC clock. ESP32 is a Wi-Fi module and can be easily connected to the internet so we will use NTP (Network Time Protocol) and UDP (User Datagram Protocol) to fetch Time from the internet using Wi-Fi.
Check the complete project here: https://circuitdigest.com/microcontroller-projects/esp32-internet-clock
Make a Bluetooth controlled Sign board using an 8*8 Matrix display. A unique feature of this project is its android application which allows the user to control all the 64 LEDs individually from the mobile phone. This enables the user to create custom designs with ease and display it on the LED display.
Check out the complete project here: https://circuitdigest.com/microcontroller-projects/arduino-based-bluetooth-controlled-sign-board-circuit-on-pcb
Simple Relay Circuit
Let’s take a simple example where we will be turning on an AC lamp (CFL) by using a relay switch. In this relay circuit we use a push button to trigger a 5V relay, which in turn, complete the second circuit and turn on the lamp.
Find the circuit details here: https://circuitdigest.com/electronic-circuits/simple-relay-switch-circuit-diagram
Transistor Switching Circuit: How Transistor Acts as a Switch
In an NPN transistor, Current starts flowing from collector to emitter only when a minimum voltage of 0.7V is supplied to the base terminal. When there is no voltage on Base terminal it works as an open switch between collector and emitter.
Know more about how a NPN or PNP transistor works as a switch: https://circuitdigest.com/electronic-circuits/npn-and-pnp-transistor-switching-circuit-diagram
Raspberry Pi DHT11 Temperature and Humidity Monitoring
In this tutorial we are going to learn how to interface the popular DHT11 sensor with Raspberry Pi and display the value of temperature and humidity on a 16×2 LCD screen
A Voltage or Potential Divider Circuit is commonly used circuit in electronics where an input voltage has to be converted to another voltage lower than then the original. This is very useful for all analog circuits where variable voltages are required, hence it is important to understand how this circuit works and how to calculate the values of the resistors required to make a voltage divider circuit to output the desired voltage.