Voltage Regulator Combo Pack – 60 Pcs (6 Popular Types, 10 Each)

SKU: Car Parking System using ATmega328-1

A car parking system using the ATmega328 microcontroller automates vehicle detection and parking management. With IR sensors for vehicle presence, an LCD for displaying available spaces, and a servo motor for gate control, it provides an efficient and user-friendly solution for managing parking lots in various settings.

Distance Measurement using Ultrasonic Sensor and Arduino

Arduino Ultrasonic Distance Measurement Project

Distance Measurement using Ultrasonic Sensor and Arduino

SKU: distance-measurement-using-ultrasonic-sensor-and-atmega328-project-1

The Distance Measurement system using an Ultrasonic Sensor and ATmega328 accurately measures distances by emitting ultrasonic waves and calculating the time taken for the waves to return. The ATmega328 microcontroller processes the data to provide precise distance readings, making it ideal for various distance-sensing applications.

Smoke Detector System using MQ135 and Arduino

Smoke Detector System with MQ135 & Arduino | Computronics Lab

Smoke Detector System using MQ135 and Arduino

Click Here to Download the Circuit Diagram of “Smoke Detector System using ATmega328”

Click Here to Download the Synopsis of “Smoke Detector System using ATmega328”

The Smoke Detector System using MQ135 and ATmega328 accurately detects smoke and harmful gases. The MQ135 sensor senses air quality and smoke levels, while the ATmega328 microcontroller processes the data to trigger alarms or notifications. This system provides reliable and responsive smoke detection for enhanced safety.

SKU: smoke-detector-system-using-mq135-and-atmega328-project.-1

Bidirectional Visitor Counter Using IR Sensor and Arduino

-29%

Bidirectional Visitor Counter with IR & Arduino | Computronics Lab

Bidirectional Visitor Counter Using IR Sensor and Arduino

https://computronicslab.com/wp-content/uploads/2024/06/Bidirectional-Visitor-Counter-Using-IR-Sensor-and-ATmega328.mp4

Explore our innovative Bidirectional Visitor Counter project using IR sensors and the ATmega328 microcontroller. This project is designed to track the number of visitors entering and exiting a room or area, making it ideal for applications in offices, shopping malls, libraries, and other public spaces.

SKU: Bidirectional Visitor Counter Using IR Sensor and ATmega328-1

Temperature Controlled Fan

-22%

Temperature Controlled Fan

SKU: Temperature Controlled Fan-1

A temperature-controlled fan system uses an Atmega328 microcontroller, DS18B20 temperature sensor, and L293D motor driver to adjust fan speed based on ambient temperature. The DS18B20 sensor provides temperature data to the Atmega328, which processes it and controls the fan via the L293D driver, ensuring efficient cooling.

LED Traffic Lights Signal Module RYG – Digital Signal Output Traffic Light Module

-33%

LED Traffic Signal Module RYG | Digital Output | Buy Online

LED Traffic Lights Signal Module RYG – Digital Signal Output Traffic Light Module

Digital Signal Output for easy control with Arduino, Raspberry Pi, and other microcontrollers.

The LED Traffic Lights Signal Module is designed for traffic signal simulation, electronics projects, and automation systems. It features Red, Yellow, and Green LEDs, mimicking real traffic lights for educational and practical applications.

Key Features:

Low Power Consumption, operating on DC 3.3V – 5V.

Compact & Durable design for easy integration into projects.

Applications:

Traffic Light Simulations for learning and demonstrations.

STEM Education & Electronics Training.

Embedded Systems & IoT Projects.

Robotics & Smart City Models.

With simple wiring and efficient LED indicators, this module is ideal for programming, automation, and real-world traffic system simulations, making it perfect for students, engineers, and hobbyists.

SKU: LED Traffic Lights Signal Module - Digital Signal Output Traffic Light Module

AI-Powered Chatbot App

-12%

AI-Powered Chatbot App

SKU: AI-Powered Chatbot App

An AI-powered chatbot app is a smart virtual assistant designed to interact with users through text or voice, providing instant responses and performing tasks efficiently. It leverages machine learning and natural language processing (NLP) to understand user queries and provide meaningful responses.

Solar Panel Cleaning Robot Using Arduino

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Solar Panel Cleaning Robot Using Arduino

SKU: Solar Panel Cleaning Robot Using Arduino

The Solar Panel Cleaning Robot is an innovative project designed to maintain the efficiency of solar panels by automatically removing dust, dirt, and other debris. This Arduino-based robotic system ensures optimal sunlight absorption, increasing the energy output of solar panels. The robot operates autonomously or through remote control, making it an ideal solution for large-scale solar farms and rooftop installations.

Underground Cable Fault Detection using Arduino and GSM

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Arduino Cable Fault Detection System | Computronics Lab

Underground Cable Fault Detection using Arduino and GSM

SKU: Underground Cable Fault Detection using Arduino and GSM

Underground cables are widely used for power transmission, but detecting faults in them can be challenging. The Underground Cable Fault Detection System using Arduino and GSM is designed to locate faults in underground cables accurately and transmit the fault location via SMS alerts. This system helps in quick maintenance and reduces downtime in power distribution networks.

Crystal Oscillator's

24MHz Crystal Oscillator (Pack of 5)

-54%

Crystal Oscillator's

24MHz Crystal Oscillator (Pack of 5)

SKU: 24mhz-crystal-oscillator-1

The 24MHz crystal oscillator provides precise timing signals with high stability and low phase noise. Essential in digital circuits, it’s used in microcontrollers, communication systems, and signal processing. Its compact design and wide temperature range ensure reliable performance in various applications, while its low power consumption enhances efficiency.

Smart Home Control Application

Smart Home Control App – IoT Automation | Computronics Lab

Smart Home Control Application

https://computronicslab.com/wp-content/uploads/2025/02/Smart-Home-Automation-ui.mp4

Transform your home into a smart, connected space with our Smart Home App UI. Effortlessly control lights, fans, Wi-Fi, appliances, and even play music—all from a sleek, intuitive interface. Experience convenience, automation, and energy efficiency at your fingertips!

SKU: Smart Home Control Application

Automatic Number Plate Recognition (with Suspicious Vehicle Detection and Alert System)

ANPR & Vehicle Alert System | Computronics Lab

Automatic Number Plate Recognition (with Suspicious Vehicle Detection and Alert System)

https://computronicslab.com/wp-content/uploads/2025/02/ANPR-Made-with-Clipchamp.mp4

This AI-powered Number Plate Recognition System uses Python and OpenCV to detect and extract number plate information from both video files and live webcam feeds. It features real-time processing, suspicious plate detection with alerts, and automatic data storage. The system is designed for security applications, enhancing surveillance and vehicle monitoring efficiency.

SKU: n/a

Robot Projects

Rf Control Robot using RF Module

-58%

Robot Projects

Rf Control Robot using RF Module

The RF transmitter sends control signals using push buttons.

This project focuses on building an RF-controlled robot using an RF transmitter and receiver module for wireless communication. The robot can be remotely operated using radio frequency (RF) signals, making it ideal for surveillance, remote monitoring, and automation applications.

Working Principle:

The RF receiver receives these signals and decodes them using a decoder IC (HT12D).

The decoded signals control motor driver IC (L298N or L293D), which drives the robot’s motors accordingly.

Applications & Benefits:

Used in wireless robotic applications such as remote-controlled cars, industrial automation, and military surveillance.

Provides long-range communication (typically up to 100 meters).

Simple and cost-effective project for learning RF communication and robotics.

SKU: Rf Control Robot using RF Module (without Microcontroller)

Simple Mini Inverter using IC 4047

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Mini Inverter Using IC 4047 – 12V to 230V AC

Simple Mini Inverter using IC 4047

These pulses drive transistors or MOSFETs, switching the transformer’s input.

This project demonstrates how to build a simple mini inverter using the IC 4047, which functions as a multivibrator to generate stable square wave pulses. The circuit converts 12V DC from a battery into 230V AC using a step-up transformer and power transistors or MOSFETs.

Working Principle:

The IC 4047 operates in astable mode, generating 50Hz or 60Hz signals.

The transformer steps up the voltage to 230V AC, making it suitable for powering small AC loads.

Applications & Benefits:

Ideal for emergency power backup for LED bulbs, mobile chargers, and small fans.

Simple, low-cost, and efficient design, perfect for beginners in electronics.

Can be modified for higher power output using stronger transistors and transformers.

SKU: Simple Mini Inverter using IC 4047

5 in 1 Robotics kit (Multi Purpose Plug & Play ) for STEM Education

-20%

5 in 1 Robotics kit (Multi Purpose Plug & Play ) for STEM Education

SKU: 5 in 1 Robotics kit (Multi Purpose Plug & Play ) for STEM Education

5 in 1 Robotics kit (Multi Purpose Plug & Play ) for STEM Education

Aero Space Robotics Kit for STEM Education

-22%

Aero Space Robotics Kit for STEM Education

SKU: Aero Space Robotics Kit for STEM Education

Aero Space Robotics Kit for STEM Education

Transistors

Voltage Regulator Combo Pack – 60 Pcs (6 Popular Types, 10 Each)

-37%

Transistors

Voltage Regulator Combo Pack – 60 Pcs (6 Popular Types, 10 Each)

Voltage Regulator Combo Pack – 60 Pcs (6 Popular Types, 10 Each)

This Voltage Regulator Combo Pack is a must-have for electronics enthusiasts, students, and professionals working on circuit design, prototyping, and experimentation. The pack includes Six widely used Voltage Regulator, with 10 pieces of each type, totaling 60 Regulator.

SKU: n/a

LED

LED 5mm and Resistors Combo Pack

-38%

LED

LED 5mm and Resistors Combo Pack

SKU: LED - Red, Green, Yellow, White & Blue - 20 pcs each and Resistor - 100 pcs Combo Pack

Raspberry Pi and Accessories

Raspberry Pi Camera Module 2 NoIR

-34%

Raspberry Pi and Accessories

Raspberry Pi Camera Module 2 NoIR

SKU: Raspberry Pi Camera Module 2 NoIR

The Raspberry Pi Camera Module 2 NoIR is a high-quality 8MP camera designed for Raspberry Pi boards. “NoIR” stands for “No Infrared Filter,” allowing the camera to capture both visible and infrared light. This makes it ideal for night vision, low-light photography, plant monitoring, and scientific projects.

Equipped with the Sony IMX219 sensor, it can capture still images at high resolution and supports video recording at 1080p30, 720p60, and 640x480p90. The camera connects via the Raspberry Pi’s CSI interface for fast, high-quality data transmission directly to the processor.

Thanks to its sensitivity to infrared light, the NoIR camera is perfect for use with IR LEDs to record images in complete darkness. It’s lightweight, compact, and easily integrated into a wide range of projects including home automation, wildlife monitoring, and robotics.

Future House Price Prediction System

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Future House Price Prediction System

SKU: Future House Price Prediction System

Future House Price Prediction System

The Future House Price Prediction System is a machine learning-based tool that forecasts the value of residential properties using historical data and key features such as location, size, number of rooms, and property age. It helps home buyers, sellers, and real estate professionals make data-driven decisions.

Built using Python and ML libraries like Scikit-learn and Pandas, the system uses algorithms like Linear Regression or Random Forest to predict future prices. Users can input property details, and the system outputs an estimated market value.

Advanced versions may include geolocation data, trend analysis, and visual dashboards for deeper insights. The platform can be integrated into a web application using Flask or Django, making it accessible and user-friendly.

This predictive system is valuable for understanding real estate trends, planning investments, and gaining a competitive edge in the property market.

Arduino UNO & IOT Projects, BTech Final Year Electronics Projects, Electrical Projects (BTech MTech), Electronics Projects (BTech MTech)

IOT Based Alcohol Detector and Engine Lock system using Arduino

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Arduino UNO & IOT Projects, BTech Final Year Electronics Projects, Electrical Projects (BTech MTech), Electronics Projects (BTech MTech)

IOT Based Alcohol Detector and Engine Lock system using Arduino

SKU: IOT Based Alcohol Detector and Engine Lock system using Arduino

This project aims to design an IoT-based alcohol detection system integrated with an engine lock mechanism using an Arduino microcontroller. The system uses an MQ-3 gas sensor to detect alcohol presence in the driver’s breath. If alcohol is detected beyond a preset threshold, the system activates a relay to lock the engine, preventing the vehicle from starting.

An ESP8266 Wi-Fi module is used to send real-time alerts to a cloud server or mobile app, enabling remote monitoring. The solution enhances vehicle safety by ensuring that only sober individuals can operate the vehicle, helping reduce accidents due to drunk driving.

This smart system is cost-effective, easy to implement, and ideal for personal cars, commercial fleets, and public transport vehicles.

Arduino UNO & IOT Projects, BTech Final Year Electronics Projects

IOT based Automatic Accident Avoiding Car using Arduino

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Arduino UNO & IOT Projects, BTech Final Year Electronics Projects

IOT based Automatic Accident Avoiding Car using Arduino

SKU: IOT based Automatic Accident Avoiding Car using Arduino

This project presents an IoT-based Automatic Accident Avoiding Car using an Arduino microcontroller, designed to enhance road safety through obstacle detection and smart decision-making. The system uses ultrasonic sensors to continuously monitor the surroundings for nearby obstacles. When an object is detected within a critical range, the Arduino instantly stops or diverts the car to avoid a collision.

Additionally, the system integrates an ESP8266 Wi-Fi module to send real-time data or alerts to a cloud platform or mobile app, allowing for remote tracking and monitoring of the vehicle’s safety status.

This intelligent vehicle safety system can be implemented in autonomous cars, robotic vehicles, and smart transportation systems to reduce the risk of accidents and ensure safe navigation.

BTech Final Year Electronics Projects, Electrical Projects (BTech MTech), Electronics Projects (BTech MTech)

Air Purifier using Arduino

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BTech Final Year Electronics Projects, Electrical Projects (BTech MTech), Electronics Projects (BTech MTech)

Air Purifier using Arduino

This project focuses on building a smart Air Purifier using Arduino, which monitors air quality and automatically purifies the air when pollution levels rise. The system uses a dust sensor (like GP2Y1010AU0F) to detect particulate matter (PM2.5/PM10) and a gas sensor (like MQ-135) to sense harmful gases such as CO₂, smoke, and ammonia.

The Arduino Uno reads these sensor values and compares them to a predefined safe threshold. If pollution levels are high, a DC fan is activated using a relay module. The fan draws air through a HEPA or activated carbon filter, cleaning it before releasing it back into the environment.

An LCD display shows real-time air quality data, and optional LED indicators give visual feedback (green for clean, red for polluted). This project is ideal for homes, offices, or classrooms, and is a great introduction to embedded systems, environmental monitoring, and automation using Arduino.

SKU: Air Purifier

Signature Verification Using Python

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Signature Verification Using Python

SKU: Signature Verification Using Python

Signature Verification Using Python

Signature Verification using Python is a smart way to authenticate handwritten signatures by comparing them digitally. The system checks whether a given signature matches a stored one, identifying it as genuine or forged.

Using libraries like OpenCV, the process begins with image preprocessing (grayscale conversion, thresholding, contour detection) to extract important signature features. These features include shape, stroke direction, and texture.

For classification, machine learning models like SVM or KNN are used, or advanced systems can employ Convolutional Neural Networks (CNNs) with libraries such as TensorFlow or PyTorch.

This technology is useful in banking, document verification, and legal sectors, where security and accuracy are critical. Signature verification systems reduce human error and allow for fast, automated processing.

Python’s flexibility and rich ecosystem make it ideal for building powerful signature verification applications, even with limited hardware and resources.

Real Time Object Detection Audio Output mobile App

-15%

Real Time Object Detection Audio Output mobile App

SKU: Real Time Object Detection Audio Output mobile App

Real Time Object Detection Audio Output mobile App

The Real-Time Object Detection with Audio Output Mobile App is a smart, AI-powered tool that uses a smartphone’s camera to identify objects in real time and provide audio feedback. It is especially helpful for visually impaired users, offering clear voice alerts like “Person ahead” or “Car on the left” as the camera detects objects.

Powered by lightweight machine learning models such as YOLO or MobileNet SSD, the app ensures fast and accurate detection directly on the device, without needing an internet connection. The built-in text-to-speech engine converts identified objects into spoken words instantly.

Key features include:

Real-time detection using phone camera

Offline audio feedback

Customizable voice and language settings

Simple, accessible interface

This app is ideal for assistive technology, robotics, or educational purposes, making AI practical and inclusive for everyday use.

Ultrasonic Sensor Mounting Bracket For HC-SR04

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Ultrasonic Sensor Mounting Bracket For HC-SR04

SKU: Ultrasonic Sensor Mounting Bracket For HC-SR04

The Ultrasonic Sensor Mounting Bracket for HC-SR04 is a specially designed holder used to securely fix the HC-SR04 ultrasonic distance sensor in robotic and embedded systems projects. It provides a stable platform for accurate sensor positioning, ensuring better distance measurement and reducing the chance of vibration or misalignment during movement or operation.

The bracket is typically made from acrylic, plastic, or metal, and features pre-cut slots or holes that align perfectly with the sensor’s pins and body. It can easily be mounted onto robots, cars, or fixed stations using screws, glue, or bolts.

Arduino UNO & IOT Projects, BTech Final Year Electronics Projects

Smart Coffee/Drink Temperature Control Cup

-21%

Arduino UNO & IOT Projects, BTech Final Year Electronics Projects

Smart Coffee/Drink Temperature Control Cup

SKU: Smart Coffee/Drink Temperature Control Cup

The Smart Coffee/Drink Temperature Control Cup uses a Peltier module and Arduino Uno to maintain your beverage at the perfect temperature. Equipped with sensors, it continuously monitors the liquid’s heat level and adjusts accordingly using the Peltier effect. An OLED display shows the current temperature, and users can set their preferred heat via touch buttons or a mobile app using IoT (ESP8266/ESP32). Ideal for office desks or home use, it ensures your drink stays warm without overheating. Portable and USB-powered, this smart cup combines convenience and innovation for tech-savvy coffee or tea lovers.

Arduino UNO & IOT Projects, BTech Final Year Electronics Projects

Portable IoT-Based Smart Mini Refrigerator for Medical Use

Arduino UNO & IOT Projects, BTech Final Year Electronics Projects

Portable IoT-Based Smart Mini Refrigerator for Medical Use

SKU: Portable IoT-Based Smart Mini Refrigerator for Medical Use

This advanced portable mini refrigerator uses a Peltier module to maintain a stable temperature, ideal for storing medicines like insulin, vaccines, and lab samples. Powered by an Arduino Uno with IoT integration (ESP8266/ESP32), it monitors and controls temperature in real-time. Users can track data via a mobile app and receive alerts if the temperature crosses the safe range. Compact, lightweight, and rechargeable, it’s perfect for healthcare workers on the move. With an OLED display, precise sensors, and cloud-based logging, this smart fridge ensures medical items stay safe during transport or field operations.

IR Remote Tester

-39%

IR Remote Tester

SKU: ir-remote-tester-project

The IR Remote Tester project verifies the functionality of an infrared (IR) remote control. By using an IR receiver and a display or LED, this circuit detects and displays signals from the remote. When a button is pressed, the tester shows whether the remote is transmitting a signal, helping diagnose remote control issues.

TP4056 Charger Module

-72%

TP4056 Charger Module

SKU: tp4056-charger-module

Introducing our TP4056 charger module, a compact and efficient solution for charging lithium-ion and lithium polymer batteries in a wide range of electronic applications. This module is designed to provide reliable charging capabilities while ensuring safety and ease of use, making it ideal for DIY projects, prototyping, and portable device applications.

Arduino Uno Kit

Arduino UNO SMD Basic Starter Kit for Beginners

-32%

Arduino Uno Kit

Arduino UNO SMD Basic Starter Kit for Beginners

SKU: arduino-uno-smd-basic-starter-kit-for-beginners

Arduino UNO SMD Basic Starter Kit for Beginners

The Arduino UNO SMD Basic Starter Kit for Beginners is a comprehensive set designed for those new to electronics and programming. It includes an Arduino UNO SMD with cable, an Ultrasonic Sensor SR04, and a Servo Motor SG90 for versatile project creation. The kit also features a Breadboard GL12 with 840 points, 10 jumper wires each (M/F, M/M, F/F), and 5 LEDs (red, green, yellow). Additional components include 5 LDR sensors, two 5V buzzers, and resistors (5 each: 1K, 10K, 220 Ohm). This kit provides everything needed to start building and experimenting with Arduino projects.

Car Turning Indicator

-36%

Car Turning Indicator

Click Here to Download the Circuit Diagram of “Car Turning Indicator”

The Car Turning Indicator project provides visual signals to indicate a vehicle’s turning or lane change. Using a set of LEDs or bulbs and a control circuit, such as a relay or electronic flasher, the system activates the appropriate lights on the car. This project enhances road safety by making the vehicle’s intentions clear to other drivers.

SKU: car-turning-indicator-project

Industrial Services

Product Prototyping Service

Industrial Services

Product Prototyping Service

Explore PCB Designing & Product Prototyping: from concept to creation, accelerate innovation with iterative designs, testing, and refining for market readiness.

We charge a modest consultation fee to ensure we can dedicate the necessary time and effort to thoroughly understand your project requirements.

SKU: Product Prototyping

Flashing LED using IC 555

-43%

Flashing LED using IC 555

SKU: flashing-led-using-ic-555

Flashing LED using IC 555 is a beginner-friendly project showcasing the 555 timer’s astable mode. It alternates LED states between on and off using resistors, capacitors, and the timer’s configuration, making it ideal for learning basic electronics and LED control concepts.

Motor Driver L298N

-38%

Motor Driver L298N

Efficient and versatile Motor Driver L298N for controlling DC motors and stepper motors. Ideal for robotics and automation projects, it supports dual H-Bridge configuration and delivers reliable performance. Compatible with Arduino and other microcontrollers, perfect for DIY electronics enthusiasts and professionals seeking precise motor control solutions.

SKU: motor-driver-l298n

Temperature Indicator using LM35 and IC741

-34%

Temperature Indicator using LM35 and IC741

SKU: temperature-indicator-using-lm35-and-ic741-project

The Temperature Indicator using LM35 and IC741 project measures and displays temperature values. The LM35 temperature sensor provides an analog voltage proportional to the temperature, which is fed into the IC741 operational amplifier. The IC741 amplifies and processes the voltage signal, allowing it to be read on a display or analog meter. This project demonstrates analog temperature measurement and signal conditioning using commonly available electronic components.

Connectors , Wires & Pins

DC Power Jack Female (Pack of 5)

-46%

Connectors , Wires & Pins

DC Power Jack Female (Pack of 5)

SKU: dc-power-jack-female-supply-socket-5.5×2.1mm

The DC Jack Connector Female is a crucial component for powering electronic devices. It provides a secure and reliable connection for DC power input, ensuring stable voltage delivery. Commonly used in power supplies, chargers, and various gadgets, its durable design guarantees long-lasting performance and easy integration into circuits.

Temperature Indicator using LM35 and IC358

-49%

Temperature Indicator using LM35 and IC358

SKU: temperature-indicator-using-lm35-and-ic358

Monitor temperatures accurately with our LM35 and IC358 Temperature Indicator. This advanced system ensures real-time data acquisition, allowing you to maintain optimal conditions effortlessly. The LM35 sensor provides precise analog voltage output proportional to the temperature, while the IC358 processes this data for clear digital display.

Neural Machine Translation

Neural Machine Translation

https://computronicslab.com/wp-content/uploads/2024/10/Neural-Machine-Translation.mp4

The objective of this project is to convert Hindi sentence to English sentence for non-native speakers using Neural Machine Translation. The dataset is preprocessed by removing punctuations and all duplicate values as well as all quotes, numbers and white spaces that are present in text data. Then English and Hindi vocabulary is prepared by splitting sentences into words. Encoder Decoder architecture is used to build the model wherein decoder is an LSTM model with embedding layer, sequence to sequence layer, attention mechanism and dense layer. The model is appropriately trained with the train data and saved the model weights, which are loaded while inferencing the test data for making the prediction. The predicted English translation will be obtained from decoded sequence function.

SKU: n/a

Clap Switch LED On/Off Using IC 555

-42%

Clap Switch LED On/Off Using IC 555

Click Here to Download the Circuit Diagram of “Clap Switch Led On Off”

The Clap Switch LED On/Off project controls an LED based on sound detection. Using a sound sensor or microphone and a relay or transistor, the circuit toggles the LED’s state with each clap. This project demonstrates basic sound-to-action control, providing a hands-free method to operate an LED.

SKU: clap-switch-led-on-off

Blinking LED using IC555

-50%

Blinking LED using IC555

Click Here to Download the Circuit Diagram of “Blinking LED using IC 555”

The Blinking LED using IC 555 project creates a flashing LED effect by configuring the 555 timer in astable mode. The timer generates a continuous square wave signal, causing the LED to blink at a rate determined by external resistors and capacitors, providing a simple demonstration of timing and pulse generation.

SKU: blinking-led-using-ic555-project

Digital Visitor Counter

-32%

Digital Visitor Counter