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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.

xx   LIGHT

Experimenting with Motorola's 68HC11 true single-chip computer. Part 6. SBC (single-board computer) applications. A look at MAG-11's binary output and how to use it A/D converter. Using the MAG-11 as a binary-display digital voltmeter and a bargraph photometer that measures foot-candles.
COMPUTERCRAFT Dec 1992 (v.2#12) pg. 16

Analog sensors for personal computers. How A/D converters work and tips on their use. Includes instructions for a "smart" light meter.
COMPUTERS & ELECTRONICS Feb 1984 (v.22#2) pg. 82

A close look at IBM's PCjr joystick ports and how to use them to convert the computer into both a simple light meter and a sophisticated, light-sensing storage oscilloscope. Ideas are applicable to other computers, too.
COMPUTERS & ELECTRONICS Aug 1984 (v.22#8) pg. 18

Simple light meter with a four-element LED bargraph is built using surface-mountable components.

Low-cost colorimeter. Accessory for a personal computer lets you compare color references with a sample and determine the best color match based on a set of built-in standards. Est. cost: $39.

Ultra sensitive cadmium sulphide meter.
ELECTRONICS ILLUSTRATED Nov 1963 (v.6#6) pg. 46

Low-cost colorimeter. Scans and identifies 1000 or more colors with 100% accuracy. Used in conjunction with a PC and two simple BASIC programs to control the circuit's operation. Est. cost: $39.
ELECTRONICS NOW May 1994 (v.65#5) pg. 45

Field-effect light meter circuit measures incident light within wavelength band of 1.1 to 0.4 microns (near infrared to blue).
ELECTRONICS WORLD Mar 1966 (v.75#3) pg. 78

Tips for indoor gardeners on how to measure footcandles of light using a hand-held incident light meter or an in-camera reflective light meter.
FINE GARDENING #6 Mar-Apr 1989 pg. 8

Key chain electronic projects rely on the use of surface-mountable components. (1) Light meter with LED bargraph display. (2) Light sensor with a rotating LED ring display. (3) Ultraminiature LED pulse transmitter.
MODERN ELECTRONICS [2] Mar 1987 (v.4#3) pg. 68

A light minder for the blind. Simple project detects ambient lighting and audibly signals whether it is on or off. Helps locate direction of light source and can signal light intensities with tones of different frequencies.
MODERN ELECTRONICS [2] Jan 1989 (v.6#1) pg. 60

Add light-meter modules to any digital voltmeter. A choice of two sensitive and accurate adapters for direct display of light levels foot-candles and lux. Part 1.
MODERN ELECTRONICS [2] Sep 1990 (v.7#9) pg. 32
Added Info MODERN ELECTRONICS [2] Dec 1990 (v.7#12) pg. 9

Add light-meter modules to any digital voltmeter. Part 2.
MODERN ELECTRONICS [2] Oct 1990 (v.7#10) pg. 40

Measure the sun's energy with a solar radiometer. Measures the amount of sunlight falling on a given area. Consists of a silicon solar cell, a milliammeter and a shunt resistor.
POPULAR ELECTRONICS [1] Dec 1976 (v.10#6) pg. 45

Uses for the multiple integrated circuit LM339, a quad comparator. Containing four independent voltage comparators, it is used in circuits for (1) a voltage-controlled oscillator, (2) limit comparator and (3) limit comparator operated as a programmable light meter.
POPULAR ELECTRONICS [1] Jan 1977 (v.11#1) pg. 94

A low-cost analog-to-digital converter for your PC lets it function as a data-acquisition tool. Transducer circuits to measure temperature, light intensity, and heart-beat are included. Est. cost: $30.
POPULAR ELECTRONICS [2] Apr 1994 (v.11#4) pg. 47

A colorimeter you can build. Sensitive photoelectric light meter, equipped with three color filters, measures the related intensities of the red, green and blue components reflected by an object being measured.
POPULAR SCIENCE Nov 1969 (v.195#5) pg. 163

Convert your old calculator into a tachometer, light meter, or speedometer among other items.
RADIO-ELECTRONICS Mar 1982 (v.53#3) pg. 70

Using the "Kaltek" RC-103 module, along with common components and a simple calculator, to build an instrument to measure resistance, capacitance, temperature, RPM, length, or angles. May also be used as part of a stopwatch or light meter.
RADIO-ELECTRONICS Jan 1985 (v.56#1) pg. 79

Simple light meter with a built-in four-element LED bargraph readout that combines the advantages of analog and digital displays. Built using surface-mountable components.
RADIO-ELECTRONICS Nov 1987 (v.58#11) pg. 75

Constructing and using a photoelectric colorimeter.
SCIENTIFIC AMERICAN Feb 1965 (v.212#2) pg. 118

How to calibrate and use photometers to calculate the sky brightness around your city. This is a measure of the "light pollution" which obscures celestial objects and makes astronomical viewing difficult or impossible.
SKY & TELESCOPE Feb 1978 (v.55#2) pg. 126

A simple dark-sky meter. This easy-to-build measuring device will allow you to accurately measure the brightness of your sky.
SKY & TELESCOPE Feb 2001 (v.101#2) pg. 138
Added Info SKY & TELESCOPE May 2001 (v.101#5) pg. 18