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Electronics For You
February  2020   Issue Vol. 52  No. 2 

TECH FOCUS
Investing In AR And VR: A Promising Tactic Or A Sheer Gamble For Your Business?
Various market reports suggest that exponential strides in extended reality (XR) technology in the coming years are going to teleport mankind into a world of unimaginable illusion. Yet, like any other technology in its infancy, a lot of issues still need to be resolved for wide-scale adoption

DO-IT-YOURSELF
Make Your Own Smart Wireless Biometric Lock
Traditional key-based locks are now outdated and come with limitations of their own. First, you always have to carry the key with you, and the key might get misplaced or stolen. Such locks are not completely secure either
Download source code 		DO-IT-YOURSELF
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 can also be used for other applications. The circuit is versatile and fully-automatic but draws very little electric current from the grid
 
DO-IT-YOURSELF
Build GPS-Based Timer For Your Radio Set
This Global Positioning System (GPS)-based timer is used to turn on and turn off a radio receiver at a specific time. The GPS clock works as the timer for turning on and turning off any digital or analogue radio receiver set at 100.1 FM band
Download source code 		DO-IT-YOURSELF
Make A Simple Power Supply For Adjustable Voltage And Current
Sometimes a simple analogue power supply with adjustable output voltage and adjustable current-limiting function is needed. This article presents a simple power supply using an adjustable regulator LM350 that provides variable output up to 17V and maximum output current below 2A. LM350 has higher power dissipation as compared to commonly-available adjustable voltage regulator LM317 and, hence, has higher guaranteed output current. This power supply may be useful in laboratories and for hobby projects
 
DO-IT-YOURSELF
Make This Joystick-Controlled Robot
The circuit presented here uses a joystick to control a robot. A joystick is more comfortable to use and accurate to control a robot as compared to switches. The circuit is simple, compact and low-cost. It uses two ATtiny13A (eight-pin) microcontrollers (MCUs) for both transmitter and receiver circuits
Download source code 		DO-IT-YOURSELF
Build This Electronic Toy For A Child
Presented here is an electronic toy circuit for your child’s entertainment. The concept of a joint family is disappearing, and childcare is also becoming difficult. It is best to spend some quality time with your child by doing things that interest him/her, or by putting things together to have some fun. This circuit has both audio and visual aspects for entertainment