Medicine-Time Reminder
We are all so busy with our daily lives that we forget to take our medicines on time, which can have several ill effects on our health. The Medication Reminder circuit...
Microcontroller Projects: RGB Colour Generator
Presented here is a red, green and blue or RGB colour generator using AT89C2051 microcontroller (MCU). This is a simple and low-cost circuit for a multiple colour generator that can be...
Low-Cost Hearing Aid
Commercially available hearing aids are quite costly. Here is a low-cost hearing aid circuit that uses just four transistors and a few passive components.
On moving power switch S to ‘on’ position,...
Face Tracking and Movement Following Drone
We all must have seen a drone and some of us might have even operated one. Most of the drones available in the market are operated manually either with the help...
Automatic 3-Phase Induction Motor Starter
3 phase induction motor starter often uses star-to-delta converters. The stator coils of the motor are connected in star configuration at the time of power-on and switched to delta configuration when...
Cordless Multi-Door Alarm
Thwart the attempt of burglary by detecting intrusion with this alarm circuit. Each door is protected by a separate circuit built around an independent 555 timer IC in conjunction with reed...
Auto Snooze for Digital Alarm Clocks
Alarm clocks are made to wake you up. However, it is quite bothersome to hear the alarm continuously until you get up and put it off. Also, you might fall asleep...
EEPROM Interface for Beginners
Electronic systems today incorporate a number of peripheral ICs that have to communicate with each other and the outside world. To maximise hardware efficiency and simplify circuit design, Philips developed a...
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 come handy in an examination hall or...
AC Lamp Blinker Using Timer 555
There are at least two popular applications of blinking a string of 110V/230V AC incandescent lamps. The first is audio-visual warning at construction sites or where repairing is going on. The...
