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.

LED lengthener. Circuit to keep an LED audio power meter display lighted long enough for the eye to detect, even though the trigger pulse may have have been of very short duration.
AUDIO AMATEUR 2/1980 [Mar 1980] (v.11#2) pg. 34

How to multiplex digital LED displays for use as readouts in computers, test instruments, etc.
BYTE Mar 1977 (v.2#3) pg. 122

Build a self-refreshing LED graphics display board for your computer system. Uses an 8x16 LED array mounted on a printed circuit board. Includes drivers written in BASIC.
BYTE Oct 1979 (v.4#10) pg. 58
Correction BYTE Dec 1979 (v.4#12) pg. 102
Added Info BYTE Jan 1981 (v.6#1) pg. 282
Added Info BYTE May 1981 (v.6#5) pg. 384

Build a scrolling alphanumeric LED display. Individual character arrays can be linked together to show longer messages. Used in scrolling LED signs. Est. cost: $45 per character.
BYTE Apr 1984 (v.9#4) pg. 32

Universal numeric LED display tester lets you test seven-segment displays. This battery powered unit accepts all popular sizes from 0.3" on up to jumbo, in both common-anode or common-cathode design.
COMPUTERCRAFT Mar 1992 (v.2#3) pg. 54

Using the National Semiconductor LM3914 IC to create a solid-state digital readout which uses lighted LEDs in place of an analog meter.
CQ. THE RADIO AMATEUR'S JOURNAL May 1980 (v.36#5) pg. 85

Learn how to program "smart" LED multicharacter displays with your computer.
ELECTRONICS NOW Jul 1995 (v.66#7) pg. 51

Block diagram shows how to cascade demultiplexers to get 60 outputs (in the form of 60 LEDs used in an electronic clock face).
ELECTRONICS NOW Nov 1995 (v.66#11) pg. 8

Dress up audio projects with solid-state level indicators. Three different methods for adding LED level indicators.
ELECTRONICS NOW Jan 1996 (v.67#1) pg. 29

Circuit for a basic moving-dot LED display built around the LM3915 IC.
ELECTRONICS NOW Oct 1997 (v.68#10) pg. 14

A binary-to-BCD converter accepts binary input and converts it to decimal (base 10) output and displays it on a seven segment LED readout. Use the circuit in counters, troubleshooting microprocessors, etc.
ELEMENTARY ELECTRONICS Sep-Oct 1980 (v.20#5) pg. 73

Displaying hexadecimal and other related ideas for microcomputers.
KILOBAUD MICROCOMPUTING #16 Apr 1978 pg. 104

Convert a seven-segment LED hexadecimal display to turn on the decimal point whenever a lowercase "b" is displayed. This will reduce confusion with the digit "6".
KILOBAUD MICROCOMPUTING #39 Mar 1980 pg. 101

Circuit to display all 16 hexadecimal "digits" on an LED display.
MODERN ELECTRONICS [2] Jan 1985 (v.1#4) pg. 68

Surface-mount-device circuits: A design and construction guide. Projects include using SMCs (surface-mountable components) to produce a subminiature LED tone transmitter, A/D converter LED bargraph or metering circuit, and light-sensitive oscillator (probe).
MODERN ELECTRONICS [2] Feb 1987 (v.4#2) pg. 40

Quick LED displays. How to use National Semiconductors' 4-digit counter/driver ICs for creating easy, low-cost numeric displays for your projects.
MODERN ELECTRONICS [2] Oct 1987 (v.4#10) pg. 26

Dress up audio projects with solid-state level indicators. Three different methods for adding LED level indicators to replace or supplement D'Arsonval (moving needle) analog meters.
POPTRONIX EXPERIMENTER HANDBOOK Summer 1997 pg. 22

How multiplexed digital readout LED displays simplify circuits and make large displays much less expensive.
POPULAR ELECTRONICS [1] Mar 1976 (v.9#3) pg. 62
Correction POPULAR ELECTRONICS [1] May 1976 (v.9#5) pg. 6

LED bargraph readouts. Measure voltage, resistance and frequency with a row of lights which show trends (direction) better than meters with needles and less expensively than digital readouts. Circuits for several types of meters shown.
POPULAR ELECTRONICS [1] Sep 1976 (v.10#3) pg. 74
Added Info POPULAR ELECTRONICS [1] Oct 1976 (v.10#4) pg. 8

A high-resolution LED display. A 10x16 160-element two-dimensional display with X-Y addressability. Used in applications involving TV, oscilloscopes, electronic games, micro-computer displays, etc.
POPULAR ELECTRONICS [1] Mar 1979 (v.15#3) pg. 94

Circuit for an experimental solid-state oscilloscope uses a 10x16 LED array for the display.
POPULAR ELECTRONICS [1] Apr 1979 (v.15#4) pg. 93

LED bargraph display circuits (readouts) use LED bargraph display chips (IC's).
POPULAR ELECTRONICS [1] Jul 1979 (v.16#1) pg. 68

Electronic scorekeeper for games. Unit keeps the score for two players and displays them on seven-segment numeric LED displays. Each score may go up to 99. A telephone dial is used to input points.
POPULAR ELECTRONICS [1] Oct 1979 (v.16#4) pg. 74
Correction POPULAR ELECTRONICS [1] Jun 1980 (v.17#6) pg. 6

Experimenting with a light pen. Part 2. Adding a bus register and a light-pen controlled LED display.
POPULAR ELECTRONICS [1] Jan 1981 (v.19#1) pg. 86

Single-LED analog meter uses a multicolor LED which changes color in response to input voltage.
POPULAR ELECTRONICS [1] Sep 1981 (v.19#9) pg. 81

A solid-state panel meter. Combining a dot-bar driver chip and a row of LEDs in one module provides a low-cost, solid-state meter. How to connect the NSM3915 as a logarithmic readout.
POPULAR ELECTRONICS [1] Nov 1981 (v.19#11) pg. 100

The big-digit display module. An array of 36 LED's and associated electronics mounted on a 2"x4" module forms an oversize 7-segment digital readout.
POPULAR ELECTRONICS [2] Jul 1989 (v.6#7) pg. 32

Build a multi-chrome projector which uses four LEDs to create and project soothing color patterns onto a small rear-projection screen. Use as a biofeedback stress reliever, or just a pleasant diversion.
POPULAR ELECTRONICS [2] Jan 1997 (v.14#1) pg. 41

Sequential stepper and driver circuit uses a seven-segment LED display to show the step position.
POPULAR ELECTRONICS [2] Mar 1997 (v.14#3) pg. 74

LED readout circuits that are solid-state versions of yesterday's magic eye tubes. (1) Pyramid configuration. (2) Bar configuration. (3) Single output steps. (4) Dot/bar display, (5) Analog-meter indicator.
POPULAR ELECTRONICS [2] Aug 1998 (v.15#8) pg. 56

LED bar graph universal indicator. Bar graphs are replacing analog meters as voltage-level indicators. Here's how the basic LED bar graph works.
RADIO-ELECTRONICS Jun 1978 (v.49#6) pg. 78

LED bar-graph display. Eight simple electronic gadgets which use this device. Electronic thermostat, expanded-scale voltmeters, line voltage monitor, auto charging system monitor/tester, car battery voltage monitor, position indicator for remote selector switch, solar heating temperature indicator, lie detector, garage door position indicator.
RADIO-ELECTRONICS Oct 1979 (v.50#10) pg. 93

Various ways to interface a microprocessor to a 7-segment LED display.
RADIO-ELECTRONICS Apr 1980 (v.51#4) pg. 74

Circuits for using the one-chip digital panel meter IC available from Intersil.
RADIO-ELECTRONICS Oct 1980 (v.51#10) pg. 112

Circuit which displays inputs from a 4x4 keypad on a 6-digit LED readout. Utilizes two new IC's from National Semiconductor, the MM74C912 and MM74C922.
RADIO-ELECTRONICS Sep 1981 (v.52#9) pg. 72

Learning all about the ABC's of seven-segment LED's.
RADIO-ELECTRONICS Oct 1981 (v.52#10) pg. 94
Correction RADIO-ELECTRONICS Apr 1982 (v.53#4) pg. 29

Clever hexadecimal display circuits that will drive ordinary seven-segment LED's and give 0 through 9 plus A through F.
RADIO-ELECTRONICS Nov 1985 (v.56#11) pg. 92

Using LED bar-graph displays to replace moving-coil meters.
RADIO-ELECTRONICS Mar 1988 (v.59#3) pg. 59

Data displays. Tips on using multiplexing to display data on LEDs. Part 1.
RADIO-ELECTRONICS Aug 1988 (v.59#8) pg. 80

Data displays. Tips on using multiplexing to display data on LEDs. Part 2.
RADIO-ELECTRONICS Oct 1988 (v.59#10) pg. 99

Data displays. Tips on using multiplexing to display data on LEDs. Part 3.
RADIO-ELECTRONICS Nov 1988 (v.59#11) pg. 74

Data displays. Tips on using multiplexing to display data on LEDs. Part 4. Seven-segment displays.
RADIO-ELECTRONICS Dec 1988 (v.59#12) pg. 93

How to adapt a 4511 circuit to drive a common-anode seven-segment LED display or to power a very large common-cathode display or even incandescent bulbs.
RADIO-ELECTRONICS Sep 1990 (v.61#9) pg. 7

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

Working with LED display drivers. Using the National Semiconductor LM391X and LM2917 series IC's to build moving-dot and bar-graph voltmeters and frequency-to-voltage converters. Part 1. LM3914-series drivers and 7-segment display systems.
RADIO-ELECTRONICS Mar 1992 (v.63#3) pg. 65

Working with LED display drivers. Part 2. Seven-segment display driving techniques.
RADIO-ELECTRONICS May 1992 (v.63#5) pg. 65

Electronic indicator for electrically actuated flaps, trim system, ... etc. uses LEDs to show the angle or position of the device.
SPORT AVIATION Dec 1993 (v.42#12) pg. 76

Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law.