IMakeProjects.com made sonic grenades from cheap personal alarms – “Pull a pin, and after a few seconds these “grenades” emit a very loud and annoying alarm – instead of shrapnel. This can be used just for fun (toss one into a sleeping roommate’s bedroom, for example) or used on the honor-system to enhance any wargames you might play – like laser tag, Airsoft, Nerf, or even Paintball. (If one “goes off” next to you, you’re out.) I modified some personal alarms to make these, and if you’re somewhat experienced with electronics you can make them too – I’ll describe what I did below. “ – [via] Link.
HOW TO – Make a sonic grenade

- Like
- Digg
- Del
- Tumblr
- VKontakte
- Flattr
- Buffer
- Love This
- Odnoklassniki
- ManageWP.org
- Meneame
- Blogger
- Amazon
- Yahoo Mail
- Gmail
- AOL
- Newsvine
- HackerNews
- Evernote
- MySpace
- Mail.ru
- Viadeo
- Line
- Comments
- Yummly
- SMS
- Viber
- Telegram
- Subscribe
- Skype
- Facebook Messenger
- Kakao
- LiveJournal
- Yammer
- Edgar
- Fintel
- Mix
- Instapaper
- Copy Link
Advertisement