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Ctesibius and the Tantalus Cup
Decipher the siphon and build a high-class practical joke, with this ancient prank from Bill Gurstelle's "Remaking History" column.

Mini Blind Minder
Sometimes the sun is my friend, warming the house on cool days.

Coffee Shop Construction Toy
Use coffee shop straws and stirring sticks to build interesting geometric shapes. The baristas don’t tend to mind, especially if you tip generously.


DIY Hacks & How To’s: The Pepper’s Ghost Illusion
Pepper’s Ghost is a special effects technique for creating transparent ghostly images.

Infrared Pulse Sensor
Turn the mechanical pulsing action of your pulse into an electrical signal with this sensor that fits over a fingertip and uses infrared light to detect blood flow.

DIY Hacks & How To’s: Motion Tracking Halloween Props
Interactive Halloween props are always fun and they are surprisingly easy to make. This year I designed a simple system that rotates a skull to face you and follows you movements as you walk by. To accomplish this I used light sensors to detect a person's shadow. An Arduino microcontroller then calculates where they are standing and activates a servo that turns the skull to face them. When they move, the skull turns to follows them.

Bookshelf Boombox
Hide an amplifier and speaker in plain sight with a project that gives a new meaning to bookshelf speakers.

DIY Scratch Art
Make your own scratch art board at a fraction of the cost, which you can use to create beautiful and dramatic designs. Unlike most high-grade art materials, this recipe does not contain any animal products.


Making a Sonic Screwdriver
For the upcoming Nashville Mini Maker Faire, NashMicro is hosting a booth where they will be allowing participants to build “sonic screwdrivers”.

Solar Cricket
Learn how to use solar panels for both battery charging and for sensing when light has dropped below a certain threshold. Learn how to use an Arduino Micro for power management, and combine these two skills into an exciting classic "cricket" noisemaker that only turns on when the sun has faded into the night.

The Sublimator Dry Ice Cannon
Here's how to build a blaster that unleashes carbon dioxide gas to launch T-shirts and other projectiles. CAUTION: Build at your own risk. This is another hazardous, perilous project from MAKE Volume 35.