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.

Build a cardio-tachometer, an electronic instrument to measure pulse rate.
ELECTRONICS ILLUSTRATED Jul 1972 (v.15#4) pg. 59

Electronic circuit to raise a heartbeat signal to logic levels uses an infrared detector that can be placed anywhere on the body.
ELECTRONICS NOW Jul 1992 (v.63#7) pg. 10

Electronic stethoscope and cardiac rate meter. Battery-operated unit incorporates a stethoscope and direct-reading heart-rate meter.
ELECTRONICS WORLD Jul 1967 (v.78#1) pg. 30

Photoplenthysmograph, a device which slips over a person's finger and shows the heartbeat wave-form on an oscilloscope.
POPULAR ELECTRONICS [1] Jul 1968 (v.29#1) pg. 27

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

Heartbeat machine. Simple electronic circuit lets you monitor the rhythmic fluctuations of your heart. Designed to respond to blood flow and visually indicate the pulse rate using an LED.
POPULAR ELECTRONICS [2] Jul 1997 (v.14#7) pg. 43
Correction POPULAR ELECTRONICS [2] Oct 1997 (v.14#10) pg. 8

Heart rate monitor. This cardiotach provides a direct readout of your heart rate. Est. cost: $100.
RADIO-ELECTRONICS Jul 1979 (v.50#7) pg. 35
Added Info RADIO-ELECTRONICS Jan 1980 (v.51#1) pg. 22

Build this heart rate monitor. Part 1.
RADIO-ELECTRONICS Sep 1982 (v.53#9) pg. 45

Build this heart rate monitor. Part 2.
RADIO-ELECTRONICS Nov 1982 (v.53#11) pg. 59

Electrocardiograph. This project uses a standard PC as an operator interface and output device. Est. cost: $289 (kit). Part 1. Theory of operation.
RADIO-ELECTRONICS Jul 1991 (v.62#7) pg. 31

Electrocardiograph. Part 2. Construction and use.
RADIO-ELECTRONICS Aug 1991 (v.62#8) pg. 44

Build this Doppler ultrasound heart monitor to listen to your heart. Est. cost: $135 (kit).
RADIO-ELECTRONICS Nov 1991 (v.62#11) pg. 49

Exploring bioelectricity, the phenomena that keeps your heart ticking. Includes a simple amplifier circuit to monitor the electrical activity of your heart.
SCIENCE PROBE! Nov 1990 (v.1#1) pg. 86
Correction SCIENCE PROBE! Apr 1991 (v.1#2) pg. 125

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