Optoelectronics hold a range of possibilities for the hardware experimenter — indeed who among us hasn’t added LEDs aplenty to our work? What many of us may be unaware of though is that an LED is also ...

Certain classes of diesel fuel are dyed red under regulations of the US Environmental Protection Agency and Internal Revenue Service. The goals of these regulations are to minimize emissions and ...

Thanks to their simplicity and low cost, green LED-illuminated heart beat sensors are now nearly ubiquitous, found in most consumer health products as well as many phones and wrist watches. But, for ...