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This module should be of particular interest if you want to build robotic devices. It uses infrared (IR) light to accurately sense the proximity of objects from 0mm to well over 100mm. It’s based on a technology known as FlightSense, patented by ST Microelectronics. by Jim Rowe
This ultraviolet (UV) light-sensing ‘breakout’ module detects the intensity of UV solar radiation and hence the degree of protection you may need to prevent skin damage. If you connect it to an Arduino or other microcontroller, it can even indicate the current ‘UV Index’. by Jim Rowe
This programmable constant-current DC load can be used to test power supplies and check the capacity of batteries. It’s a self-contained device that delivers good value for money. by Jim Rowe
The AD8238-based heart rate monitor module is a low-cost way to monitor the operation of the heart via an Arduino or similar, like an electrocardiogram. It comes with a 3-electrode lead and is available from Jaycar. by Jim Rowe
In this last article on low-cost air quality sensors, we look more closely at particulate matter (PM) sensors, also called “dust” or “smoke” sensors. by Jim Rowe