Ultraviolet light-emitting diodes to reduce bycatch marine turttles

Researches from USA and Mexico found that the use of ultraviolet light-emitting
diodes installed in nets reduces nearly 40% the capture of the marine turttle Chelonia mydas. You can read in detail the study published in Biology Letters here

& More little stuff coming :)

Bolsista do Ciência sem Fronteiras é premiada em competição de engenharia de sistemas biológicos

Leia mais: Bolsista do Ciência sem Fronteiras é premiada em competição de engenharia de sistemas biológicos

Obama's call to code

President Obama calls Americans to code

Clipping: "Arduino: LCD Thermometer with optional Alarm"

Cool link to a LCD thermometer using arduino:

Arduino: LCD Thermometer with optional Alarm

 

 

Stuff

And there are more coming on! ;-)

About the use of a photocell

Following good information on the use of photocells with arduino:

Analog Voltage Reading Method

The easiest way to measure a resistive sensor is to connect one end to Power and the other to a pull-down resistor to ground. Then the point between the fixed pulldown resistor and the variable photocell resistor is connected to the analog input of a microcontroller such as an Arduino (shown) [keep reading]