The beginner’s guide for hobbyists and makers unlocks some of the practical secrets behind lightning detection design.

Mobile health specialist Happitech has launched software that it says can help researchers use photoplethysmography (PPG) technology in the development of applications for use in cardiovascular care.

Tested by our CNET fitness expert and recommended by the personal trainers we consulted, these are the best chest strap heart-rate monitors for your workouts.