That’s how laser projectors that cost thousands of dollars work, but it’s also how this cheap, 3D-printed plastic contraption turns a simple laser pointer into a full-on light show.

Toy laser pen BURNS both retinas in a 14-year-old boy's eyes - causing the teenager irreversible eyesight damage A teen, 14, suffered burns to his retinas when he looked into a laser pointer ...

Most shop-bought laser pens - particularly those which emit red light - are relatively weak and pose little risk to health. However, more powerful devices are readily available online.

Today's laser pens are up to 5,000 times stronger than those used fifteen years ago. Their strength has risen from 1 milliwatt - equivalent to the power you'd need for a pointer in a classroom ...

Hardware This 3D printed laser chip-hacking device uses a $20 laser pointer, costs $500 to build, and was developed so that 'people can do this in their homes' News By Andy Edser published 5 ...

Commonly available laser pens usually emit a red light in wavelengths of between 630 and 670 nano-metres (nm), green at a rate of 532 nm or blue light at about 445 nm.

LASER pointers can be handy. Backyard astronomers use them to point out constellations on the vault of the heavens; management consultants to highlight their wisdom on a whiteboard. They are less ...

Instructables member Patrick Panikulam has created a versatile wireless Arduino pen plotter and laser engraver, powered by an Arduino UNO microcontroller and offering a work area of 200 x 162 mm ...

A mother is calling for laser pointers to be banned after her son caused permanent damage to his eye. It took eight-year-old Jonny Marshall a quarter of a second to burn his eye when he shone the ...