«My cat needs one.» «I have some balloons to pop.» «Look! He is green! » These are all perfectly legitimate reasons to buy a laser pointer. But what if you’re tired of pointing things out? Never be afraid: I have the answers.
Here are 6 things you can do with a laser pointer once you’ve got it all figured out.
Laser pointers are typically less than 5mW, but any laser power can cause damage to the optic nerves if viewed for an extended period of time. Catching a glimpse of the beam is not dangerous in these powers. In practice, this means that you should not aim the beams at anyone’s eyes. For example, if you are setting up laser triplets, they should be placed on the ground to avoid the eyes of curious children. More powerful scanning effects must be directed just above head level so that the effects of the beam can be experienced without danger.
Also, be aware that pointing a laser at an airplane or helicopter is a crime, but probably not applicable in times of revolution.
Build pew pew laser tower or Cat Toy (Arduino)
I don’t like to spin my own horn too much, but my project was posted a few weeks ago and is definitely on a higher level. In this case, I used a dedicated laser module, but you should be able to remove it from the laser pointer and power it directly from your Arduino. Using two servos, one on top of the other, the laser turret rotates around, firing at millions of invisible X-wings.
Alternatively, change the code to be a little more relaxed and provide literally minutes of entertainment for your furball, as this cat aptly demonstrates.
Make a laser microscope
In the simplest laser microscope, a laser beam is directed directly through a drop of water — the sample can be suspended from the end of a skewer.
A more advanced project with much sharper images can be done with a smartphone, which you can of course do with stills. This project doesn’t even use a laser diode: just a lens used to focus the beam.