Make A Hi-Fi Stereo Audio Amplifier Using LA4601
Here is a simple 4W audio stereo power amplifier using a ten-pin LA4601 IC. Only a few passive components, including ceramic and electrolytic capacitors,...
Battery-Discharge Measurement Circuit
Battery-life measurement for a portable system is a time-consuming task and many methods used for it do not give reliable results. Presented here is...
Simple Interface for Digital Sound Synthesis
You can make a digital sound synthesizer, for experimentation with sound equipment or with peripheral devices, using special integrated circuits or digital-to-analogue converters (DACs)....
Low-Cost Corona Sanitising Chamber
Staying safe and disinfected these days is one of the major issues.The chances of spreading the virus through touch has high probability in daily...
Cheapest Digital Altimeter
The altimeter is one of the basic and most essential devices used in-flight systems, drones, space rockets, and submarines to measure the altitude of...
Cheapest Touchless Water Dispenser
A touchless water dispenser uses an IR sensor to detect whether or not a hand/glass is present near it. If detected, then a relay...
This Gauss Meter Is Simple To Make
Presented here is the design of a low-cost Gauss meter using a linear Hall effect sensor and a standard alkaline battery. A Gauss meter...
DIY: Make Your Own Nifty Night Lamp
This simple circuit can be used to light a small area at night. It is useful as a nifty bedroom night lamp, but it...
Museum Watchdog
Theft at a museum means more than just the loss of an object, as it affects the historical, artistic and scientific value of the...
Over-Heat Detector
NTC thermistors are often the preferred choice for temperature sensing and control in many applications, primarily because of their small package sizes and attractive...
Microcontroller Projects: Electronic Card Lock for Appliances
The circuit presented here can be used as a lock for important electronic and electrical appliances. When a card is inserted inside its mechanism,...
Arduino Based Fancy Lights Controller
Assemble yourself a portable, four-channel multi-mode light controller using an Arduino Uno board and very few external components.
The fancy lights controller described here is...
Solar Light For A Portable Toilet
Despite being more expensive than standard permanent outdoor toilets, portable toilets (Fig. 1) have several significant benefits as these are self-contained and can be...
Make A Crystal-Locked FM Transmitter
The circuit presented here uses a crystal oscillator and frequency multiplier to generate a highly-stable carrier signal frequency of 96MHz. With 40mW of RF...
Battery Charger and Discharger Using USB Power Supply
Gadgets like electronic toys and musical players commonly use 1.2V rechargeable batteries in capacities ranging from 200mAh to 2800mAh, which need to be charged...
Automatic Water Tap Without Using Microcontroller
Water scarcity is one of the biggest issues plaguing the world today. To prevent this from becoming any worse, we need to focus on...
Illuminated Optical Magnifier
We often face problem while reading the values of ICs and miniature SMD components, detecting cracks or shorts in tracks in a PCB, or...
Electronics Projects: Low-Cost Dusk-Dawn Controller
Solar streetlights can be easily integrated with a dusk-dawn controller by simply employing a pnp transistor and a few resistors where the solar panel...