This laser pointer or laser pen is a small handheld device with a laser diode emitting a very narrow coherent low-powered laser beam of visible light, it is frequently used in lecture halls and demonstrations to point at topics of interest on a presentation board. In a school setting, they have become ubiquitous, and they are very useful teaching aids....
The very popular 595 shift register chip of the 74 series is used a lot by hobbyis because of its wide availability, good speed and simplicity. Just plug it on an arduino like shown in the tutorials and youi have 8 more outputs, put two and you have 16 more outputs ! (up to a lot of them actually, with only three pins !)
Module laser rouge de classe IIIa affichant un point rouge. Au-delà de 3 mètres, la luminosité du point rouge diminue.
Output Power: Min 2.5mW, Typical 3.0mW, Max 5.0mW
Working current: Min 10mA, Typical 20mA, Max 25mA
Working voltage: Min 2.3VDC, Typical 4.5VDC, Max 8.0VDC
Working Temperature: Min -15C, Typical 25C, Max 35C
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