Tell us about yourself!
Think the laser from a Laser Printer would work in this situation?
Does it have to be an Arduino or can it be one of the cheaper knockoffs?
Make your own Magnetic Stirrer 2S
Yardstick Paracord Jig
20' Geodesic Dome Greenhouse
Easy Topsy Turvy Tomatoes for Cheap
Capacitive-Touch Arduino Keyboard Piano
How to make solid culture medium plates for yeast culture