Embedded Systems Conference
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
Author
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
Author
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
Author
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
Shaft sensors and their wiring make field-oriented motor control pricey, but sensorless alternatives are available.
EE Times will host a radio show on "Why Connect a Car?" at 1:00p.m. eastern, May 11.
A basic, precompetitive research base is required to continue to advancement of the semiconductor industry, says SRC president.
MEMS provide an alternative route to scaling technology beyond Moore’s Law that could have benefits in markets such as the Internet of Things.
EDN's Designer's Guide to Electromagnetic Compatibility, written by Bill Kimmel and Daryl Gerke, provides many tips for minimizing emissions and immunity. It's also a great source for quiz questions.
Most Recent Comments
March 2015 Cartoon Caption Contest: Mountain Climbing
March 2015 Cartoon Caption Contest: Mountain Climbing
The mountain had formed millions of years before when two tektronix plates collided.
208 comments
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