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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.


Multivibrator circuit made with a pair of VMOS MOSFETs. An adjustable rate dual LED flasher with enable input which uses the multivibrator is also shown.
COMPUTERS & ELECTRONICS Jan 1983 (v.21#1) pg. 113

LED flasher uses a solar cell to charge its nicad battery. May also be run from ordinary battery.
CQ. THE RADIO AMATEUR'S JOURNAL Mar 1979 (v.35#3) pg. 107

Subminiature LED flasher is built using surface-mountable components.

Glitter Globe. This sophisticated Christmas ornament is constructed of electronic components. Flashing LEDs create the illusion that the globe is spinning. Est. cost: $65.

Micro-Lights, a pocket-sized miniature light show consisting of 19 LED lamps arranged in a geometric pattern and controlled by a PIC16C71 microcontroller. Est. cost: $59 (kit).

Build the "Picture Stick" and light up the night with computer-generated graphics. Combine LEDs, a yardstick, batteries, and other miscellaneous parts into a unique demonstrator of the visual principles underlying movies, television, etc. Uses a computer to generate the patterns. Est. cost: $35.

A string of LEDs (light-emitting diodes) flashing on one at a time in sequence. An easy project for beginners to build.

Simple timer circuit flashes an LED at one-second intervals.

Super LED flasher circuit teaches you how to use the 555 timer IC. Est. cost: $6 (kit).

Simulated laser emits a bright, pulsating light from a Stanley LED (unique for its high output and focusing ability). Will produce a 1-ft. diameter red circle from ten feet away in a darkened room. Est. cost: $8 (Kit).

Getting started in surface mount technology. (1) Dual LED flasher circuit. (2) Tone burst circuit.

The LED-head. Build this amusing electronic "face" that appears to change mood when the LEDs that define its features (eyes, eyebrows, mouth) are randomly switched.
ELECTRONICS NOW Jul 1994 (v.65#7) pg. 41

Learn how electronic games work. Build the C-Game, a two-player game with 12 different game modes and 4 modes to generate sound effects and light-patterns displays. Est. cost: $79.
ELECTRONICS NOW Jul 1994 (v.65#7) pg. 62

Build the "Picture Stick". Combine ICs and 16 LEDSs, a yardstick, batteries, wire, and duct tape into a unique demonstrator of the visual principles underlying movies, television, and computer displays. When you wave the stick at night, the flickering LEDs produces patterns of stars, circles, diamonds, etc. Est. cost: $35.
ELECTRONICS NOW Oct 1994 (v.65#10) pg. 35

Micro Lights. Learn how the PIC16C71 microcontroller works. Use it to construct a pocket-sized LED flasher that responds to sound. Est. cost: $59.
ELECTRONICS NOW Dec 1994 (v.65#12) pg. 39

Five easy EEPROM projects to put your EEPROM programmer to work. All of the projects are variations of LED flasher circuits.
ELECTRONICS NOW Nov 1995 (v.66#11) pg. 39

Electronic lighthouse. Miniature lighthouse features a flashing LED that will run for over a year on a single D-size battery.
ELECTRONICS NOW Aug 1996 (v.67#8) pg. 45

Executive decision support system. Eight LEDs are started flashing in a random fashion. When finished, only one LED remains lit. This points to the "correct" decision for the "question" being asked.
ELECTRONICS NOW Sep 1996 (v.67#9) pg. 40
Added Info ELECTRONICS NOW Dec 1996 (v.67#12) pg. 16

Install blinking light-emitting diodes and a power supply in jewelry, toys, crafts, etc., to create a novelty.
ELEMENTARY ELECTRONICS Mar-Apr 1973 (v.13#2) pg. 58

Photo firefly. Provides both audio and visual 1-second and 10-second output pulses from a built-in speaker and LEDs. Pulses are triggered from the 60-Hz AC line which provides power.
ELEMENTARY ELECTRONICS Nov-Dec 1975 (v.15#6) pg. 63

Circuit that flashes a light-emitting diode (LED) for over a year on one single "C" size battery is part of a circuit which can be used to drive LED's from a 1-volt source, even though 1.6 volts is normally needed.
ELEMENTARY ELECTRONICS Nov-Dec 1975 (v.15#6) pg. 77

Building a modern solid-state version of an "idiot box" with flashing LEDs can be instructive, especially in the area of combining standard circuits in novel ways.
ELEMENTARY ELECTRONICS May-Jun 1978 (v.18#3) pg. 33

Blinky. A printed circuit in the shape of a face with LEDs for eyes. Touch his lips and the eyes blink on and off.
ELEMENTARY ELECTRONICS Nov-Dec 1980 (v.20#6) pg. 56

Electronic Christmas tree ornament uses 19 LEDs to give the illusion of an exploding and imploding six point star. Est. cost: $10.
ELEMENTARY ELECTRONICS Jan-Feb 1981 (v.21#1) pg. 43

Circuit for alternately-flashing a pair of LED's. Powered by a 5V to 15V source. Incorporates a 555 IC.
HANDS-ON ELECTRONICS Jan-Feb 1986 (v.3#1) pg. 4

Multi-purpose flashing LED circuit. Est. cost: $3.
HANDS-ON ELECTRONICS Jan-Feb 1986 (v.3#1) pg. 53

Circuit for a darkroom timer which radiates a light pulse from an LED at one-second intervals.
HANDS-ON ELECTRONICS Nov 1986 (v.3#6) pg. 27

Flashlight finder. Circuit for a constantly-flashing LED with a very low current drain.
HANDS-ON ELECTRONICS Nov 1986 (v.3#6) pg. 28

Simple circuit to flash one or more LEDs.
HANDS-ON ELECTRONICS Dec 1986 (v.3#7) pg. 25

LED flasher circuit uses a low-cost CMOS IC to turn four LED's on and off. The circuit can be expanded to form a quad ring-around LED flasher.
HANDS-ON ELECTRONICS Mar 1987 (v.4#3) pg. 96

Illumination intensifier circuit for LED's. Replace an LED in any flasher circuit with a 100- to 200-watt lamp.
HANDS-ON ELECTRONICS Mar 1987 (v.4#3) pg. 97

Gee Whiz badge. Surround your convention nameplate with solid-state chase lights.
HANDS-ON ELECTRONICS Aug 1987 (v.4#8) pg. 47

Flashing LED pilot lamp circuit has a low current drain making it suitable for battery-powered items.
HANDS-ON ELECTRONICS Nov 1987 (v.4#11) pg. 94

LED flasher is a simple do-nothing circuit.
HANDS-ON ELECTRONICS Mar 1988 (v.5#3) pg. 104

Electronic steppers take the drudgery out of sequencing circuits. Three circuits that turn LED's on and off in a sequential manner.
HANDS-ON ELECTRONICS May 1988 (v.5#5) pg. 92

Mini-marque picture frame. Surround a picture with 24 LED "chase lights" to draw attention.
HANDS-ON ELECTRONICS Sep 1988 (v.5#9) pg. 68

LED flasher circuit uses four silicon cells to charge the battery which drives the flasher. Est. cost: under $11.
MODERN ELECTRONICS [1] Jun 1978 (v.1#4) pg. 58

Digi-trance. 60 light emitting diodes (LEDs) are arranged in a spiral pattern. You can control the apparent speed of movement as the lighted diodes race into the spiral. Powered either by batteries or 120 Vac power supply.
MODERN ELECTRONICS [1] Dec 1978 (v.1#9) pg. 29

Super-bright LEDs. What is available and tips on their use. Includes a flasher circuit for driving a super-bright LED which uses a pair of 4011 NAND gates as an oscillator.
MODERN ELECTRONICS [2] Apr 1985 (v.1#7) pg. 74

A multi-function oscillator circuit uses two transistors. Applications include a code-practice oscillator, lamp and LED flashers, audio oscillator, dc-to-dc upconverter, relay control, and pulse generator.
MODERN ELECTRONICS [2] Jul 1985 (v.2#1) pg. 62

Miniature LED beacon adds realism to model airplanes, trains, etc. Can be used as an attention-getting device in jewelry, science-fair projects, etc.
MODERN ELECTRONICS [2] Jan 1988 (v.5#1) pg. 38
Correction MODERN ELECTRONICS [2] Mar 1988 (v.5#3) pg. 59

Alternate (dual) flashing lamps project describes both the basic LED-only circuit and the optional high-power incandescent-lamp system (for use as a nighttime safety/hazard-warning device).
MODERN ELECTRONICS [2] May 1988 (v.5#5) pg. 50

Electronic lighthouse. Model lighthouse will flash an LED for over a year using power from a single D-cell battery. Est. cost: $5.

Three circuits all use light-emitting diodes. (1) Relaxation oscillator blinker, (2) dual blinker, and (3) polarity reversal alarm.
POPULAR ELECTRONICS [1] Oct 1970 (v.33#4) pg. 101

Circuit for a flasher circuit uses a 555 tuner and a dual-element LED.
POPULAR ELECTRONICS [1] Feb 1975 (v.7#2) pg. 77

Experimenting with LEDs. Flasher circuits and battery tester circuit using LED's.
POPULAR ELECTRONICS [1] Mar 1975 (v.7#3) pg. 78

A look at the many uses for the LM3909 LED flasher/oscillator device. Part 1.
POPULAR ELECTRONICS [1] Jul 1975 (v.8#1) pg. 64

A look at the many uses for the LM3909 LED flasher/oscillator device. Part 2.
POPULAR ELECTRONICS [1] Oct 1975 (v.8#4) pg. 82

Circuit capable of flashing two LEDs at different rates.
POPULAR ELECTRONICS [1] Oct 1975 (v.8#4) pg. 89

Dual LED flasher circuit can be cascaded for sequential flashing.
POPULAR ELECTRONICS [1] Jan 1976 (v.9#1) pg. 80

Building a TTL sequence generator can teach you about digital logic IC's and provide a circuit for use in signal generators, LED flashers, electronic music, and random on-off switches.
POPULAR ELECTRONICS [1] Feb 1976 (v.9#2) pg. 101

Circuit for alternate flashing of LEDs.
POPULAR ELECTRONICS [1] Nov 1976 (v.10#5) pg. 92

Circuit for multiple flasher of LED's can be used for decorative lighting outdoors or indoors during the holiday season.
POPULAR ELECTRONICS [1] Dec 1977 (v.12#6) pg. 87

Four easy-to-build LED projects. (1) Dual LED alternate blinker, (2) single led flasher, (3) simple six-bit binary counter and (4) wheel of fortune where a wheel of LEDs turn on in succession, gradually getting slower, until only one LED remains lit.
POPULAR ELECTRONICS [1] Apr 1978 (v.13#4) pg. 80

Circuit for a back-and-forth sequential flasher. LED's will sequentially flash going to the right, then reverse and flash back sequentially going to the left, similar to a pendulum motion.
POPULAR ELECTRONICS [1] Sep 1978 (v.14#3) pg. 98
Correction POPULAR ELECTRONICS [1] Jan 1979 (v.15#1) pg. 8

Ultra-simple high-brilliance light-flasher circuit built around an FRL-4403 flashing LED.
POPULAR ELECTRONICS [1] Jan 1981 (v.19#1) pg. 99

Schematic diagram of a circuit for a model railroad crossing signal light which flashes.
POPULAR ELECTRONICS [1] May 1981 (v.19#5) pg. 96

Circuit uses a 555-timer IC to operate two LEDs as a flip-flop oscillator.
POPULAR ELECTRONICS [1] Sep 1982 (v.20#9) pg. 102

One-second timer circuit flashes an LED at one-second intervals. Ideal for timing photographic applications.
POPULAR ELECTRONICS [2] Mar 1989 (v.6#3) pg. 27

Alternating LED flasher circuit causes the LED's to light in time with an oscillator circuit.
POPULAR ELECTRONICS [2] Sep 1989 (v.6#9) pg. 23

Flashlight finder circuit is an LED flasher circuit that can be attached to your flashlight to make it easier to locate in the dark.
POPULAR ELECTRONICS [2] Sep 1989 (v.6#9) pg. 27

Light chaser circuit uses two strings of LED's.
POPULAR ELECTRONICS [2] Oct 1989 (v.6#10) pg. 27
Correction POPULAR ELECTRONICS [2] Jan 1990 (v.7#1) pg. 4

Super light chaser circuit can sequence up to 100 LED's.
POPULAR ELECTRONICS [2] Aug 1990 (v.7#8) pg. 23

Light chaser circuit drives LED's or 117-volt lighting (via an optional relay or optocoupler/triac combination).
POPULAR ELECTRONICS [2] Sep 1990 (v.7#9) pg. 25

Unusual flasher uses a 555 timer to clock a BCD up/down counter, which in turn, drives a BCD-to-decimal decoder that's used to sequentially light ten LEDs.
POPULAR ELECTRONICS [2] Jan 1991 (v.8#1) pg. 24

LED indicator circuits for all occasions. (1) AC pilot light. (2) DC pilot light. (3) Polarity indicator. (4) 5-volt voltage-level indicator. (5) Oscillator-driven flasher. (6) Decoder converts audio CW code into visual dots and dashes.
POPULAR ELECTRONICS [2] Oct 1991 (v.8#10) pg. 82

Circuits based on the LM3909 oscillator/flasher IC. (1) Dual LED driver. (2) Tick circuit flashes an LED and gives out a sharp tick on a speaker. (3) Variable audio-frequency oscillator. (4) Electronic siren. (5) Code-practice oscillator. (6) AC lamp flasher.
POPULAR ELECTRONICS [2] May 1993 (v.10#5) pg. 70

A mixed collection of practical 555-timer IC application circuits. (1) Schmitt-trigger converts sinewaves into squarewaves. (2) Dark-activated relay switch can control lighting. (3) Code-practice oscillator. (4) Electronic door buzzer. (5) LED flasher. (6) Long-period timers.
POPULAR ELECTRONICS [2] Jun 1993 (v.10#6) pg. 62

A collection of display circuits. (1) Neon-light driver. (2) LED circuit which slowly shifts between three colors. (3) Channel-output LED display for a stereo system. (4) Stroke counter for golfer.
POPULAR ELECTRONICS [2] Jan 1994 (v.11#1) pg. 22
Correction POPULAR ELECTRONICS [2] May 1996 (v.13#5) pg. 73 (LED 3 color circuit)

Collection of 555 oscillator/timer circuits. (1) Astable multivibrator. (2) Modified astable. (3) Add-on LED dual-flasher circuit. (4) Add-on high-power dual-lamp flasher circuit. (5) DC-to-DC converter. (6) Dual-tone generator.
POPULAR ELECTRONICS [2] Jan 1994 (v.11#1) pg. 72

A collection of display circuits (continued). (1) Monostable 555-timer circuit that alternately flashes a red and a green LED. (2) LED flasher uses a single 1.5-volt source. (3) Count-down switch will turn a 110-volt lamp off after a predetermined time. (4) 10-LED VU meter is adapted to measure the relative sound level in a room.
POPULAR ELECTRONICS [2] Feb 1994 (v.11#2) pg. 24

Analysis of three 555-timer circuits to blink an LED.
POPULAR ELECTRONICS [2] May 1994 (v.11#5) pg. 28

Getting started using surface-mount technology components with two projects. (1) 555 dual-LED flasher. (2) Tone burst circuit puts out a 500-Hz tone.
POPULAR ELECTRONICS [2] Mar 1995 (v.12#3) pg. 39

Circuits for flashing neon lamps and LED's.
POPULAR ELECTRONICS [2] Jun 1995 (v.12#6) pg. 77

Simple circuit uses an LED to emulate the flash of a firefly with respect to the light's color, attack and decay time, intensity, and flash frequency.
POPULAR ELECTRONICS [2] Dec 1995 (v.12#12) pg. 75

LED flasher circuit lets you choose between different flashing rates by using potentiometers.
POPULAR ELECTRONICS [2] Jul 1996 (v.13#7) pg. 64

(1) LED light sequencer turns one of eight LEDs first on, then off, in order. (2) Up/down sequencer will sequence the LEDs either up or down depending on the setting of a switch. (3) Up/down sequencer add-on counts up to LED16 and then back down to LED1.
POPULAR ELECTRONICS [2] Aug 1996 (v.13#8) pg. 12

Experimenting with the 4093 NAND Schmitt trigger. Circuits include oscillator, signal injector, fluorescent-light inverter, fluorescent flasher, Morse code sender, beep-tone generator, LED flasher, and timer.
POPULAR ELECTRONICS [2] Feb 1998 (v.15#2) pg. 50

Circuit for driving IR devices or visible LEDs features an adjustable pulse rate.
POPULAR ELECTRONICS [2] Feb 1998 (v.15#2) pg. 67

Darkroom timer is built into a plastic 35mm film can. A light emitting diode flashes at a rate you can control. Count the flashes to determine time interval. Useful for night photography or getting attention of children. Est. cost: $5.
POPULAR PHOTOGRAPHY May 1974 (v.74#5) pg. 98
Added Info POPULAR PHOTOGRAPHY Jul 1974 (v.75#1) pg. 116

The flasher LED. How it works and typical applications.
RADIO-ELECTRONICS Oct 1980 (v.51#10) pg. 108

Build this state-of-the-art "do nothing" box with flashing lamps. 13-LEDs are randomly lit by a circuit which includes an EPROM.
RADIO-ELECTRONICS Mar 1981 (v.52#3) pg. 60
Correction RADIO-ELECTRONICS Jun 1981 (v.52#6) pg. 80

LED flasher circuit reduces the amount of battery drain required when using an LED as an indicator light.
RADIO-ELECTRONICS Jul 1983 (v.54#7) pg. 76

Build this phony burglar alarm. Electronic "scarecrow" makes your house appear to be protected by a sophisticated alarm system. This dummy "alarm-status display" flashes red and green LED's. Est. cost: $20.
RADIO-ELECTRONICS Sep 1986 (v.57#9) pg. 44

Subminiature LED flasher uses surface-mountable components.
RADIO-ELECTRONICS Nov 1987 (v.58#11) pg. 73

Pocket-sized electronic Christmas tree. A 7" high tree-shaped printed-circuit board is outlined by blinking red, green and yellow LEDs. Operates for 300 hours on two AA batteries.
RADIO-ELECTRONICS Dec 1987 (v.58#12) pg. 47, 71

How to cascade the 4017 CMOS to build a circuit using sequencing logic (decade counters, sequential counting, LED flasher, etc.).
RADIO-ELECTRONICS May 1989 (v.60#5) pg. 12

Electronic Christmas tree picture is actually a printed circuit board with colored LED's for lights. The lights blink in unison with nearby audio signals (such as music) that is picked up by a built-in microphone. Est. cost: $125.
RADIO-ELECTRONICS Dec 1990 (v.61#12) pg. 40

Troubleshooting an LED flashing circuit which incorporate CMOS 567 tone decoders to toggle a latching relay.
RADIO-ELECTRONICS Sep 1991 (v.62#9) pg. 12

Working with LED's. Beginning an in-depth survey of optoelectronic systems by taking a close look at a wide variety of LED circuits. Part 1. LED basics and practical LED flashers.
RADIO-ELECTRONICS Jan 1992 (v.63#1) pg. 50

Working with LED's. Part 2. Practical LED chaser and bar-graph displays.
RADIO-ELECTRONICS Feb 1992 (v.63#2) pg. 69

LED flasher circuit designed to run at two flashing rates, depending on the setting of a switch.
SCIENCE & ELECTRONICS [2] Mar-Apr 1981 (v.21#2) pg. 88

Circuit for a jumbo LED pulsating warning light.
SPORT AVIATION Jul 1993 (v.42#7) pg. 73