Wonder How To

Every how-to video that exists

There are 1736 people online

226717 free how-to videos and growing

Searching to bring you the best how-to videos

1966 new videos have been added this week

Each video is hand curated by us & you!

Welcome back flhitman

Learn how to save gas for high fuel economy

Check out all the Wonderstars

36 Categories of how to videos

There are 61 members online, join today

Discover our Wonderlists - better than TV

poopnoodles just commented on a video

424 sub-categories to narrow results

Everyone welcome newbie, greenfield13!

401 newbies have joined in the past 24 hours!

You don't have to make the video to Submit it...

...All you need is the video URL

Hot Learn Japanese playlist...

...created by TunaHead

Have you seen what's HOT!?

261 how to videos added in the past day.

Only search in this category

Random Video Turn an old scanner into a keyboard light

All Categories > Electronics > Hacks, Mods & Circuitry

Build a motion alarm

How to build a motion alarm This video shows how to build a very simple but very effective motion alarm for less than 12 euro's (about $18). If you carry this alarm a small magnet and some thin rope, you'll be able to protect virtually anything: bags, doors, drawers, anything that you don't want to be moved by someone else without knowing it.

Wonder How To Build a motion alarm

All Videos In Subcategory - Hacks, Mods & Circuitry

Turn a PDA into a wall projector 2:08 (B+) 136 How to solder surface mount chips

Solder surface mount chips 8:55 (A-) 137 How to build a motion alarm

Build a motion alarm 1:47 (B+) 138 How to hack telephones with a beige box

Hack telephones with a beige box 10:50 (A-) 139 How to make a clock projector

Make a clock projector 1:45 (A) 140

136 - 140 of 611 videos

Email Favorite

Create/Add To Playlist

Create New Playlist

Video Information

How to build a motion alarm

Electronics • Hacks, Mods & Circuitry

This video shows how to build a very simple but very effective motion alarm for less than 12 euro's (about $18). If you carry this alarm a small magnet and some thin rope, you'll be able to protect virtually anything: bags, doors, drawers, anything that you don't want to be moved by someone else without knowing it.

you haven't graded this video yet click below to grade

A+

A-

B+

B-

C+

C-

D+

D-

Average Grade B+

Length 1:47