9V battery Projects

The Stalker ‘Bot

The Stalker ‘Bot

Gather the parts and follow the basic instructions and you can have a robot capable of following moving objects! With basic coding experience, you can also change the distance at...

Posted by Tzofi Klinghoffer

Categories: Arduino, Robotics | 2 Comments


MonoBox Powered Speaker

MonoBox Powered Speaker

MonoBox is a small, inexpensive powered speaker that amplifies the output of your headphone music player. It’s little but it’s loud! All the circuit parts are available from RadioShack. The...

Posted by Ross Hershberger

Categories: Electronics, Music | 65 Comments


Evasive Beeping Thing

Evasive Beeping Thing

The Evasive Beeping Thing is appropriately named, since it dutifully does exactly what its name implies: it sends out a 5-second, high-pitched beep every few minutes. The source is extremely...

Posted by Brad Graham

Categories: Fun & Games | No Comments


Talking Booby Trap

Talking Booby Trap

Having trouble with people snatching your top-secret stuff? Need help getting some privacy? Here’s a sneaky gizmo you can make to keep those snoops away. It’s a Talking Booby Trap:...

Posted by Bob Knetzger

Categories: Fun & Games, Electronics | No Comments


Living Room Baja Buggies

Living Room Baja Buggies

Do you like radio-controlled (R/C) cars? Do you like the desert, but hate the heat? Well, sit down and kick back as you engage in the excitement of Living Room...

Posted by John Mouton

Categories: Electronics | No Comments