Breaking News
Blog

The wheelchair siren

David Bley
8/17/2011 05:17 PM EDT

 4 comments   post a comment
NO RATINGS
View Comments: Newest First | Oldest First | Threaded View
ReneCardenas
User Rank
Rookie
re: The wheelchair siren
ReneCardenas   9/30/2011 4:49:16 AM
NO RATINGS
Like this story, reminds me of my first electrical circuit, it was a high-voltage generator, using a battery and couple of transistors, it was an interesting challenge to hold on to thiose metal bars!

Sanjib.A
User Rank
CEO
re: The wheelchair siren
Sanjib.A   8/21/2011 8:05:54 AM
NO RATINGS
That was one my first few circuits too. Much before I studied engineering, since my childhood I was passionate about building small electronic gadgets by referring to books/magazines which used to publish hobby circuits. Even though I did not fully understand how that circuit worked, I built that circuit with two transistors and a small speaker form an old radio. My friends and I had fun with that for some time.

agk
User Rank
Rookie
re: The wheelchair siren
agk   8/20/2011 7:33:18 AM
NO RATINGS
That is good idea and design. Now it can be done with simple piezeo buzzer.

More Blogs
Reference designs from chip makers serve as a starting point. However, you should establish your own power budget based on how you intend your product is to be used.
Carrying four devices -- PC, smartphone, tablet, and wearable -- only leads to more confusion. The question is which device to retire from the fleet. Charlie Cheng says the smartphone is the most vulnerable.
It's no easy feat tailoring a communications software stack for your IoT design in these days when some layers are still rapidly evolving.
Skype's co-founder once predicted that telephones would eventually become just an app. He foresaw a doomsday scenario for phone companies. We're seeing the inkling of it in China Mobile's latest financial results.
The Heartbleed bug may be a media frenzy over a small, quickly patched bug, but it raises important questions about open-source software.
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Top Comments of the Week