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Tutorial

  • Motion Detection

    Overview In this project, we’ll build a PIR motion sensor system with an ESP32. When motion is detected, the LED will turn on. Since the ESP32 operates at a 3.3V...

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  • PIR Motion Sensor

    A PIR (Passive Infrared) sensor is an electronic device that detects motion by measuring infrared (IR) radiation emitted by objects in its field of view. It is like a pair of “invisible...

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  • IR Sender

    In the previous project, we learned how to capture signals from a remote controller. In this project, we’ll build our own remote controller to replicate the functionality of an existing...

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  • IR Receiver

    the VS1838B is a common and widely-used infrared (IR) receiver module. It’s designed to receive and decode infrared signals from remote controls, making it ideal for projects involving IR communication. Key Features...

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  • Remote Infrared

    Remote infrared (IR) works by transmitting invisible infrared light signals from a remote control to a receiving device, such as a TV, air conditioner, or home theater system. Here’s a...

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  • NTC Temperature Sensor

    An NTC (Negative Temperature Coefficient) sensor is a type of temperature sensor whose resistance decreases as the temperature increases. This behavior is the opposite of a PTC (Positive Temperature Coefficient) sensor, where the resistance...

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  • Smart Sunrise Alarm

    In this project, we’re going to design a smart sunrise alarm that uses a light-dependent resistor (LDR) and an active buzzer. This clever alarm will detect the first light of...

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  • Voltage Divider Circuit

    Voltage Divider Explanation A voltage divider is a simple circuit made of two resistors connected in series. It is used to scale down a voltage to a desired level. The...

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  • Photoresistor Sensor

    A photoresistor (also known as a light-dependent resistor or LDR) is a type of resistor whose resistance decreases as the intensity of light hitting the device increases. It is made of a semiconductor material that...

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  • Musical Doorbell

    Let’s create a simple music doorbell using a button and a passive buzzer! When a guest presses the doorbell button, the music will play. Wiring Instructions: Buzzer: Connect the buzzer’s negative...

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  • Passive Buzzer

    A passive buzzer requires an external signal to create sound. It does not have a built-in oscillator, so it relies on a square wave signal or frequency input from the...

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  • Active Buzzer

    An active buzzer is a self-contained unit that generates sound when power is supplied to it. It has a built-in oscillator, so you only need to provide a high or...

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  • Buzzer

    A buzzer is a small electronic device that produces sound when powered. It is commonly used in alarms, notifications, and indicators in various electronic projects. There are two main types of buzzers:...

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