Mobile Phone Detector Using LM358
This mobile phone detector can sense the presence of an activated mobile phone from a distance of four to five metres. So it can...
Precise Industrial Timer
Industrial timers are widely used in the industry for automatic controlling of electrical devices. Most timers available in the market are either complicated or...
Picture Slideshow Using ESP32
A small TFT display connected to Raspberry Pi can display many pictures one after another. This can also be done using ESP32, using the...
Home Automation System Using a Simple Android App
Nowadays, people have smartphones with them all the time. So it makes sense to use these to control home appliances.
Presented here is a home...
Artificial Intelligence-Based Chatbot for Appliance Control
This project presents an artificial intelligence (AI)-based chatbot for controlling electrical home appliances using ESP8266-12E NodeMCU and Facebook Messenger platform. The platform for creating...
Microcontroller-Based LED Lights Pattern Generator
Here is a circuit meant for babies for generating various light patterns on eight LEDs. Lights pattern generator circuits available in the market are...
No-Load and Overload Protector for AC Motors
There are occasions when the water pump runs idle when there is no water in the sump/underground tank or the treadmill machine is left...
Revive Your Microwave: DIY Control Board Replacement for Any Model
Circuit and WorkingSoftwareDownload Source CodeConstruction and TestingDownload PCB and Component Layout PDFs: click hereOperational InstructionsAuto ModeManual ModeCaution
Is your microwave oven rendered useless due to...
Arduino-Based MOSFET Terminal Identification System
Metal oxide semiconductor field effect transistor (MOSFET) is a semiconductor device widely used for switching applications and amplifying electronic signals. While the facility to...
Dual Sharing RTC
Necessity
I have an old window AC at my lab, situated at the terrace. The AC needs to be run intermittently more so often when...
Tiny Wi-Fi Switch for $3
Out of curiosity, I ordered the tiny ESP8266 relay switch from aliexpress.com but never knew it could be so embarrassing to find the right...
Arduino-Based Coil Winding Temperature Recorder and Alarm Generator
Monitoring the temperature of a transformer or electric motor winding involves data acquisition. This project is developed to monitor the temperature of an electric...
Motion Detector Security Alarm Using Digispark Development Board
This circuit produces an alarm whenever someone comes near the spotting range of its passive infrared (PIR) motion sensor. It can be used as...
PWM-To-Analogue Signal Converter
This article presents a simple circuit to convert transistor-transistor logic (TTL) or pulse width modulation (PWM) signal to analogue signal using LM358 operational amplifier....
Simple and Low-Cost GPS Clock
Real-time clock (RTC) integrated circuits (ICs) are used for reasonably accurate time displays. The accuracy of RTCs mostly depends on the crystal. In a...
Fastest Finger First For Four Players
Fastest finger first technique is used in quiz shows (with rapid fire rounds) to find the order in which participants press the buzzer (to...
Smart Irrigation System
This project is based on the AEIOU heuristic framework of Design Engineering Approach.
Design for Performance, Safety and Reliability is ensured in terms of segregation...
12-Multi National Digital Clock on Arduino UNO
The presence of 12 Multi-National Digital clock is very common at the lobby / front desk of star hotels, showing time & dates of...