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…
SensorsA collection of 12 posts
1 Min Read
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…
3 Min Read
Project – 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…
1 Min Read
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…
1 Min Read
Project – Temperature Measurement
To use an NTC thermistor with the ESP32, you need to connect it in a voltage divider configuration. Here’s how you can do it: Components Needed: Circuit Connections:…
1 Min Read
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….
3 Min Read
Project – 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…
2 Min Read
Project – 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…
2 Min Read
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…
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