Main Supply Interruption Alarm
Issue: November  2015 Page: 116 Author: Pradeep G.

Wireless AM Listening Bug
Issue: October  2015 Page: 114 Author: Pradeep G.

Fire Alarm Using a Thermistor
Issue: September  2015 Page: 122 Author: Pradeep G.

Door-Opening Alarm Using Hall Sensor
Issue: August  2015 Page: 107 Author: Pradeep G.

Over-Heat Detector
Issue: July  2015 Page: 118 Author: Pradeep G.

Glass Break Alarm
Issue: June  2015 Page: 92 Author: Pradeep G.

Low-Cost Metal Detector
Issue: May  2015 Page: 98-99 Author: Pradeep G.

Air Motion Derector
Issue: April  2015 Page: 100 Author: Pradeep G.

Smoke, Alcohol and LPG-Detection Alarm
Issue: February  2015 Page: 114-115 Author: Pradeep G.

Door-Knock or Viabration Alarm
Issue: December  2014 Page: 84 Author: Pradeep G.

Wireless Door-Opening Alarm
Issue: August  2014 Page: 96-97 Author: Pradeep G.

Touch Alarm
Issue: June  2013 Page: 106 Author: Pradeep G.

Ultronic Transmitter and Receiver
Issue: January  2012 Page: 123 Author: Pradeep G.

Door-Opening Alarm
Issue: December  2011 Page: 105 Author: Pradeep G.

Door Knock Alarm With Timer
Issue: November  2011 Page: 105 Author: Pradeep G.

Car Reverse Horn
Issue: September  2011 Page: 114 Author: Pradeep G.

Automatic Bathroom Lamp
Issue: August  2011 Page: 123 Author: Pradeep G.

Crysteal AM Transmitter
Issue: October  2010 Page: 118 Author: Pradeep G.

Low Cost Hearing Aid
Issue: June  2010 Page: 102 Author: Pradeep G.

Hum-Sensitive Touch Alarm
Issue: May  2010 Page: 100 Author: Pradeep G.

Twi-Light Using White LEDs
Issue: April  2010 Page: 95 Author: Pradeep G.

Four-Stage FM Transmitter
Issue: March  2010 Page: 101 Author: Pradeep G.

Room Sound Monitor
Issue: February  2010 Page: 105 Author: Pradeep G.

Stereo Headphone Amplifier
Issue: September  2009 Page: 120 Author: Pradeep G.

Multitone Siren
Issue: August  2009 Page: 117 Author: Pradeep G.

Hydro Alarm
Issue: June  2009 Page: 86 Author: Pradeep G.

Multichannel Door Alarm With Display
Issue: June  2009 Page: 58 Author: Pradeep G.

Low-Cost Stopwatch
Issue: April  2009 Page: 87 Author: Pradeep G.

Top 10 Circuits
Issue: January  2009 Page: 99 Author: Pradeep G.

Music-Operated Lights
Issue: July  2008 Page: 94 Author: Pradeep G.

Wire-Break Alarm With Delay
Issue: June  2008 Page: 73 Author: Pradeep G.

Ultrasonic Sound Beam Burglar Alarm
Issue: April  2008 Page: 92 Author: Pradeep G.

Pressure-Sensitive Alarm
Issue: March  2008 Page: 106 Author: Pradeep G.

Cordless Multi-Door Alarm
Issue: February  2008 Page: 96 Author: Pradeep G.

Hum-Sensitive Touch Alarm
Issue: January  2008 Page: 146 Author: Pradeep G.

Audible IR Proximity Detector
Issue: November  2007 Page: 96 Author: Pradeep G.

Infrared Burglar Alarm
Issue: October  2007 Page: 121 Author: Pradeep G.

Corrosion-Free Water-Level Indicator
Issue: August  2007 Page: 94 Author: Pradeep G.

Contactless Telephone Ringer
Issue: June  2007 Page: 85 Author: Pradeep G.

IR Remote On/Off Switch
Issue: May  2007 Page: 92 Author: Pradeep G.

Accurate 1Hz Generator
Issue: April  2007 Page: 94 Author: Pradeep G.

Simple HF Power Amplifier
Issue: February  2007 Page: 100 Author: Pradeep G.

IR Music Transmitter and Receiver
Issue: January  2007 Page: 108 Author: Pradeep G.

Ultrasonic Proximity Detector
Issue: December  2006 Page: 88 Author: Pradeep G.

Sensitive AM Transmitter
Issue: November  2006 Page: 96 Author: Pradeep G.

Optical Remote On/Off Switch
Issue: October  2006 Page: 105 Author: Pradeep G.

Audio-Controlled Running Light
Issue: January  2006 Page: 106-107 Author: Pradeep G.

Soft Switch
Issue: December  2005 Page: 89 Author: Pradeep G.

Simple Smoke Detector
Issue: November  2005 Page: 103 Author: Pradeep G.

Liquid-Level Alarm
Issue: October  2005 Page: 101 Author: Pradeep G.

Infrared Interruption Counter
Issue: September  2005 Page: 76-78 Author: Pradeep G.

Medium-Power FM Transmitter
Issue: August  2005 Page: 80 Author: Pradeep G.

Dog Caller
Issue: July  2005 Page: 94 Author: Pradeep G.

Multidoor Opening Alarm With Indicator
Issue: June  2005 Page: 89-90 Author: Pradeep G.

Sound-Operated Switch For Lamps
Issue: May  2005 Page: 85-86 Author: Pradeep G.

Simple Low-Power Inverter
Issue: April  2005 Page: 68 Author: Pradeep G.

Long-Range Burglar Alarm Using Laser Torch
Issue: January  2005 Page: 80 Author: Pradeep G.

Burglar Alarm Sensitive Optical
Issue: May  2004 Page: 77 Author: Pradeep G.

Low Resistance Continuity Tester
Issue: April  2004 Page: 60 Author: Pradeep G.

Switch Sound Operated On/Off
Issue: March  2004 Page: 48 Author: Pradeep G.

Timer with Alarm
Issue: February  2004 Page: 61 Author: Pradeep G.

Powerful Window Charger
Issue: January  2004 Page: 121 Author: Pradeep G.

Wireless Door Operating Alarm
Issue: November  2003 Page: 58 Author: Pradeep G.

IR Remote Music Bell
Issue: October  2003 Page: 61 Author: Pradeep G.

FM Wireless Bug
Issue: September  2003 Page: 58 Author: Pradeep G.

Low Cost Hearing Aid
Issue: August  2003 Page: 58 Author: Pradeep G.

Door Opening Alarm with Remote Control
Issue: July  2003 Page: 50 Author: Pradeep G.

Knock Alarm
Issue: November  2002 Page: 96 Author: Pradeep G.

QRP Transmitter 20M 4-Watts
Issue: September  2002 Page: 92 Author: Pradeep G.

Guard for Blind Electronic
Issue: July  2002 Page: 98 Author: Pradeep G.

Touch Switch Single Plate
Issue: May  2002 Page: 95 Author: Pradeep G.

FM Booster
Issue: February  2002 Page: 92 Author: Pradeep G.

Laser Torch Based Voice Transmitter & Recr
Issue: January  2002 Page: 104 Author: Pradeep G.

Alarm Smoke
Issue: December  2001 Page: 92 Author: Pradeep G.

Power Supply for Walkie-Talkies
Issue: November  2001 Page: 88 Author: Pradeep G.

Light Operated Organ
Issue: September  2001 Page: 90 Author: Pradeep G.

Pest Repeller
Issue: June  2000 Page: 87 Author: Pradeep G.

Light Switch, Light Operated
Issue: May  2000 Page: 85 Author: Pradeep G.

Light Operated Light Switch
Issue: May  2000 Page: 85 Author: Pradeep G.

Alarm Using Opto-coupler Latch-up
Issue: April  2000 Page: 88 Author: Pradeep G.

Latch-up Alarm Using Opto-Coupler
Issue: April  2000 Page: 88 Author: Pradeep G.

FM Transmitter Long range
Issue: December  1999 Page: 83 Author: Pradeep G.

Radio Remote Control
Issue: November  1999 Page: 84 Author: Pradeep G.

Intercom Low-Cost Transistorised
Issue: October  1999 Page: 88 Author: Pradeep G.

Cordless Headphone Infrared
Issue: August  1999 Page: 80 Author: Pradeep G.

Wireless Calling Bell Musical
Issue: July  1999 Page: 86 Author: Pradeep G.

Bell Wireless Musical Calling Bell
Issue: July  1999 Page: 86 Author: Pradeep G.

Conversion Receiver 40 Metre Direct
Issue: May  1999 Page: 81 Author: Pradeep G.

Voltage Detector Contactless AC Mains
Issue: April  1999 Page: 92 Author: Pradeep G.

Wiper Speed Controller
Issue: March  1999 Page: 90 Author: Pradeep G.

Musical Calling Bell Switchless Counter
Issue: February  1999 Page: 51 Author: Pradeep G.

Switchless Musical Calling Bell Counter
Issue: February  1999 Page: 51 Author: Pradeep G.

Pest Repeller Ultrasonic Variable Freq.
Issue: December  1998 Page: 90 Author: Pradeep G.

Ultrasonic Pest Repeller Variable Freq.
Issue: December  1998 Page: 90 Author: Pradeep G.

Fluid Level Detector
Issue: November  1998 Page: 72 Author: Pradeep G.

Level Detector Fluid
Issue: November  1998 Page: 72 Author: Pradeep G.

Detector Fluid Level
Issue: November  1998 Page: 72 Author: Pradeep G.

Clap Switch
Issue: October  1998 Page: 49 Author: Pradeep G.

Switch Sensitive Temperature
Issue: September  1998 Page: 83 Author: Pradeep G.

Musical Bell with Timer Touch-Sensitive
Issue: August  1998 Page: 49 Author: Pradeep G.

Touch Sensitive Musical Bell with Timer
Issue: August  1998 Page: 49 Author: Pradeep G.

Alarm Anti-theft Car Wireless
Issue: June  1998 Page: 47 Author: Pradeep G.

Inverter Low-cost Transistorised
Issue: May  1998 Page: 56 Author: Pradeep G.

Low Cost Transistorised Inverter
Issue: May  1998 Page: 56 Author: Pradeep G.

FM Transmitter Quality
Issue: April  1998 Page: 82 Author: Pradeep G.

Transmitter FM Quality
Issue: April  1998 Page: 82 Author: Pradeep G.

Relay Driver Sensitive
Issue: December  1997 Page: 88 Author: Pradeep G.

Sensitive Relay Driver
Issue: December  1997 Page: 88 Author: Pradeep G.

Ultrasonic Switch
Issue: November  1997 Page: 77 Author: Pradeep G.

Switch, Ultrasonic
Issue: November  1997 Page: 77 Author: Pradeep G.

Toggle Switch, Single IC Based Optical
Issue: July  1997 Page: 62 Author: Pradeep G.

Remote Musical Bell
Issue: June  1997 Page: 64 Author: Pradeep G.

Musical Bell Remote
Issue: June  1997 Page: 64 Author: Pradeep G.

Bell Remote Musical
Issue: May  1997 Page: 64 Author: Pradeep G.

Alarm, Infrared Intruder
Issue: February  1997 Page: 66 Author: Pradeep G.

Infra red Introder Alarm
Issue: February  1997 Page: 66 Author: Pradeep G.

Infrared Burglar Alarm with Timer
Issue: October  1996 Page: 61 Author: Pradeep G.

Burglar Alarm with Timer Infrared
Issue: October  1996 Page: 61 Author: Pradeep G.

Alarm with Timer, Infrared Burglar
Issue: October  1996 Page: 61 Author: Pradeep G.

LED Chaser, Touch Sensitive
Issue: July  1996 Page: 80 Author: Pradeep G.

Touch Sensitive LED Chaser
Issue: July  1996 Page: 80 Author: Pradeep G.

Remote TV Headphones
Issue: December  1994 Page: 93 Author: Pradeep G.

Solidstate Advertisement Display
Issue: October  1994 Page: 78 Author: Pradeep G.

Advertisement Display, Solidstate
Issue: October  1994 Page: 78 Author: Pradeep G.

Stereo Disconnector with Timer
Issue: September  1994 Page: 93 Author: Pradeep G.

Timer, Stereo Disconnector
Issue: September  1994 Page: 93 Author: Pradeep G.

Musical Continuity Tester
Issue: August  1994 Page: 85 Author: Pradeep G.

Improved Pest Repeller
Issue: June  1994 Page: 76 Author: Pradeep G.

Pest Repeller, Improved
Issue: June  1994 Page: 76 Author: Pradeep G.

Listening Bug
Issue: May  1994 Page: 100 Author: Pradeep G.

Multichannel Touch Switch
Issue: March  1994 Page: 50 Author: Pradeep G.

Walkman Radio Player, Transistorised
Issue: February  1994 Page: 102 Author: Pradeep G.

Transistorised Walkman Radio Player
Issue: February  1994 Page: 102 Author: Pradeep G.

DXers SW Booster for
Issue: January  1994 Page: 90 Author: Pradeep G.

SW Booster for DXers
Issue: January  1994 Page: 90 Author: Pradeep G.

Audio-Visual Telephone Indicator
Issue: December  1993 Page: 117 Author: Pradeep G.

Ferrous Metal Detector
Issue: November  1993 Page: 98 Author: Pradeep G.

Metal Detectolr, Ferrous
Issue: November  1993 Page: 98 Author: Pradeep G.

Programmable Organ
Issue: October  1993 Page: 126 Author: Pradeep G.

Sleep Timer with Alarm
Issue: September  1993 Page: 110 Author: Pradeep G.

Auto Power-Off for TV
Issue: August  1993 Page: 107 Author: Pradeep G.

Advertisement Display Mini
Issue: July  1993 Page: 110 Author: Pradeep G.

Dual Tone Siren
Issue: May  1993 Page: 113 Author: Pradeep G.

Siren, Dual Tone
Issue: May  1993 Page: 113 Author: Pradeep G.

Car Horn with Hindi Song Tunes
Issue: April  1993 Page: 116 Author: Pradeep G.

Continuity Tester cum Cap. Meter
Issue: March  1993 Page: 104 Author: Pradeep G.

Intercom, Super Simple
Issue: February  1993 Page: 55 Author: Pradeep G.

Alarm, Fire
Issue: January  1993 Page: 54 Author: Pradeep G.

Fire Alarm
Issue: January  1993 Page: 54 Author: Pradeep G.

Oscillator, Wireless Code Practice
Issue: December  1992 Page: 93 Author: Pradeep G.

Wireless Code Practice Oscillator
Issue: December  1992 Page: 93 Author: Pradeep G.

Audio Running Lights
Issue: November  1992 Page: 92 Author: Pradeep G.

Horn, Double Tune Car Reverse
Issue: October  1992 Page: 78 Author: Pradeep G.

Generator, Rain Sound
Issue: September  1992 Page: 126 Author: Pradeep G.

Rain Sound Generator
Issue: September  1992 Page: 126 Author: Pradeep G.

Alarm, Transistorised Warning
Issue: August  1992 Page: 79 Author: Pradeep G.

Transistorised Warning Alarm
Issue: August  1992 Page: 79 Author: Pradeep G.

Miniature IC Organ
Issue: July  1992 Page: 97 Author: Pradeep G.

IC Organ, Miniature
Issue: July  1992 Page: 97 Author: Pradeep G.

Temperature Controlled Oscillator
Issue: June  1992 Page: 85 Author: Pradeep G.

Telephone Amplifier Cum Broadcaster
Issue: May  1992 Page: 72 Author: Pradeep G.

Wind Sound Generator
Issue: April  1992 Page: 48 Author: Pradeep G.

Generator, Wind Sound
Issue: April  1992 Page: 48 Author: Pradeep G.

Radio, Pocket Using LA4510
Issue: March  1992 Page: 59 Author: Pradeep G.

Pocket Radio Using LA4510
Issue: March  1992 Page: 59 Author: Pradeep G.

Musical Horn, Low Cost
Issue: February  1992 Page: 102 Author: Pradeep G.

Horn, Low Cost Musical
Issue: February  1992 Page: 102 Author: Pradeep G.

Smoke Alarm
Issue: April  1991 Page: 111 Author: Pradeep G.

Radio, Match Box Size
Issue: January  1991 Page: 124 Author: Pradeep G.

Match Box Size Radio
Issue: January  1991 Page: 124 Author: Pradeep G.

Switch cum Heat Operated Switch, Touch
Issue: December  1990 Page: 139 Author: Pradeep G.

Heat Operated Switch, Touch Switch cum
Issue: December  1990 Page: 139 Author: Pradeep G.

Switch, Remote Control
Issue: February  1990 Page: 123 Author: Pradeep G.

Toy Organ, Light Operated
Issue: December  1989 Page: 128 Author: Pradeep G.

Bar Generator, Remote TV, Horizontal
Issue: November  1989 Page: 132 Author: Pradeep G.

Musical Horn for Cars
Issue: August  1989 Page: 123 Author: Pradeep G.

Control Two Loads With A Single Wire
Issue: May  1989 Page: 109 Author: Pradeep G.

Burglar Alarm, Multi-Purpose
Issue: February  1989 Page: 114 Author: Pradeep G.