Simplify Solid-State Lighting Dimmer Design
Solid-state lighting is rapidly becoming the most popular lighting option for a broad range of applications. With the U.S. government's mandate to save energy,...
Make Your Own Air Quality Monitoring Device!
Air pollution and concern about air quality is not something new. Complaints were recorded even in the 13th century when coal was first used...
Speed Checker for Highways
While driving on highways, motorists should not exceed the maximum speed limit permitted for their vehicle. However, accidents keep occurring due to speed violations...
Application Of Ultra-Low-Power Converters In The IoT
It is predicted that there will soon be 25 billion permanently-connected sensors to implement the Internet of Things (IoT) in real time. But the...
0-50V Variable Power Supply Using LM317
Presented here is a 0-50V, 1A variable power supply that has been designed using positive-adjustable voltage regulator LM317 IC. This IC normally generates voltages...
Wireless Water Level Indicator Without MCU
A wired water-level indicator uses many wires, whose resistance increases as their length increases. A wireless water level indicator using microcontroller (MCU) is costly...
Arduino-Based FM Receiver
This project is an FM receiver circuit radio based on Philips TEA5767 digital radio-receiver module. The radio receiver uses I2C interface with Arduino UNO...
RF-based Dual mode Robot
Here is a dual-mode robot that can be operated manually using an RF-based remote control and can also move automatically avoiding all the obstacles....
PC Based DC Motor Speed Controller
This PC based DC motor speed controller circuit allows you to control the speed of a DC motor (in eight levels) from your PC’s...
Automatic USB-Controlled Power Switch
Almost all electronic gadgets now come with one or more USB ports. You can use the USB port as an automatic switch to control...
Programmable Power Supply With TL431
TL431 and LM431 are relatively low-noise, stable and low-cost shunt regulators. These can be used to build all sorts of power supplies including programmable...
Simple 12V, 1A SMPS
Most electronics enthusiasts require DC power supplies to operate various devices and accessories. The most popular and common supply is a 12V DC supply...
LME49710 Based Audio Amplifier
Listening to music on a self-made system is great. Good-quality audio amplifier circuits can be constructed with minimum components. Described here is an LME49710...
Dimming LCD Backlight
Presented here is a power-saving LCD backlight control circuit. An LCD is used in many projects for indication or information display since it consumes less...
Universal Power Supply
Linear regulators like LM317, LM337, 78xx and 79xx, Zener diodes (1.3W) and reference diodes (e.g., LM336) are quite inexpensive and widely available. So you...
Visitor Counter
Presented here is a simple counter circuit that counts the number of visitors entering or exiting an auditorium or any other place where you...
Simple Low-Cost Visitors Counter
Here is a simple and inexpensive visitor counter circuit that you can build easily. Visitor counters available in the market are generally expensive and...
Portable Crystal Tester
A crystal tester is an indispensable tool. Most electronics projects working with high-frequency equipment utilise crystals to generate frequency for an oscillator. Using this...