Batteries Projects

555 Timer Blinky

In this project, you’ll learn how to solder together a battery-powered, 555 Timer-driven blinky toy.

Posted by Brian Jepson

Sun Logger

A data logger is a device that is left to run for long periods of time, making regular measurements of external sensors. We’ll be using the Arduino microcontroller and a...

Posted by Steve Hobley

Categories: Computers & Mobile, Arduino | No Comments

Make: Compressed Air Rockets Kit

Building this rocket launcher is a breeze, and folks are always amazed at how it shoots reusable paper rockets 200–300 feet high. The launcher is made from PVC pipe. You...

Posted by Rick Schertle

Categories: Fun & Games | 3 Comments

Simple Van de Graaff Generator

When I was younger, I spent hours perusing Bill Beaty’s electrostatics web pages. At the time, I didn’t achieve any real successes trying to build his high-voltage contraptions, and so...

Posted by Adam Wolf

Categories: Science | 6 Comments

PVC Two-Faced Clock

If you and a friend or relative live in different time zones, keep track with this two-faced clock.

Posted by Larry Cotton and Phil Bowie

Categories: Furniture, Home | No Comments

Tiny Wanderer

In early 2011 my robot club, the Dallas Personal Robotics Group, was looking for a way to help our beginning members build up their skills. To this end, we produced...

Posted by Doug Paradis

Categories: Electronics, Robotics | No Comments

Charlie’s RFID Teddy Bear

This location-aware teddy bear reads RFID tags and plays different customizable sounds depending on where it is or what object it’s near — other toys, books, CDs, anything. Charlie’s Bear...

Posted by David Harris

Categories: Arduino, Music | 3 Comments

Lawnbot400

I have always hated mowing the lawn. I was the guy who only mowed when the grass got to be 6" taller than the neighbors’ lawns — not because I...

Posted by J D Warren

Categories: Electronics, Arduino, Robotics | No Comments

This lightweight night-cycling vest displays your current speed in glowing, 7-inch-tall numbers easily visible to cars. On the back, an Arduino microcontroller reads input from an off-the-shelf bike speedometer sensor,...

Posted by Mykle Hansen

Categories: Electronics, Fun & Games | No Comments

LED Throwies

Make and toss a bunch of these inexpensive little lights to add color to any ferromagnetic surface in your neighborhood.

Posted by Graffiti Research Lab

Categories: Electronics | No Comments

Vibrating Pillow

By Annie Shao and Rachel McConnell There are pillows that look good, and there are pillows that feel good. For those inclined to add a little buzz to their home...

Posted by Annie Shao

Categories: Craft, Sewing | No Comments

PS/2/You LED Sign

It all started with a small LCD salvaged from an old printer. I recruited my code-savvy older brother, Adam, and we soon had the LCD displaying text from an Arduino...

Posted by Immanuel McKenty

Categories: Electronics | 7 Comments