Multifunction Rechargeable Digital Clock
Presented here is a digital clock that also functions as a rechargeable light lantern and a mobile charger. The digital clock has all the...
Wireless Equipment Control Using MATLAB-Based GUI
In process instrumentation and control, operators in the plant equipment control room monitor on-field sensors and send real-time commands to control actuators and final...
Arduino-based Front Office Visitor Alarm
This Arduino based visitor alarm is useful for offices, clinics and shops. It alerts you to the entry of a visitor by producing a...
Wireless VU meter
VU meter is a standard device that indicates the signal level in audio equipment. Unlike other devices, this meter doesn't require a physical connection...
Interfacing Multiple LCDs With Arduino
Here we describe the interfacing of three 16x2 LCDs with common data lines to an Arduino Uno board. Four data lines of all the...
Bipolar Transistor Tester
This bipolar transistor tester can indicate the type of the transistor as well as identify its base, collector and emitter pins. The circuit is...
Digital Pulse Tester
Here is a small digital pulse tester that can be used to test and troubleshoot digital circuitry. The circuit is essentially a pulse generator...
Digital Timer Enhancement
This simple circuit automatically activates or deactivates an electronic device at the time of alarm preset in a clock. When the alarm rings, the...
PC-Based Wireless Control for Toy Car
Here we show how you can control a wireless toy car through your PC’s serial port using a pair of ASK transmitter and receiver...
Square Root Generator Circuit
This square root generator circuit generates the square root of the input at a reference voltage. Such type of square-root output is normally used...
Versatile Probe
You can use this versatile probe for continuity testing and identification of transistor type and transformer windings. The N-side or P-side of a transistor...
Sixth Order Butterworth Low Pass Filter
Low-pass filters are widely used in the audio domain. Their most important application is in communication receivers and communication audio circuitry. These filters, when...
Wireless Extender For IR Remote Controls
Using this system, you can control your IR-remote-controlled home appliances like DVD player and air-conditioner from another room without the hassle of running extra cables between the two rooms.
Single-Wire 4×4 Matrix Keypad Using AVR
This tutorial demonstrates a different way of interfacing a 4x4 matrix keypad with ATmega32 AVR microcontroller. Keypad is one of the most important input...
Triple Power Supply From USB
Nowadays, most portable electronic gadgets are powered by USB adaptors. These adaptors have 5V, 1A to 5V, 2.1A output, which is enough to power...
Connected Message Lamps using ESP8266 | IoT Projects
It is not just another Engraved LED lamp that you see on the market nowadays. This is an advanced version of that lamps. In...
Solid State Voltage Stabiliser
In India, we have a large power distribution system with heavy distribution losses and variations in industrial/ domestic load. This results in voltage variations...
Electronic Dice Using AT89C2051
This simple AT89C2051 based electronic dice circuit demonstrates the capability of an AT89C2051 microcontroller chip to function as a random number generator based on...