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From the Electronics World
Get Your Fingers Off of Me
Photo courtesy of Quantum
The QTouch™ family of touch and
proximity sensors from Quantum
Research Group ( www.qprox.com)
have the ability to sense physical
contact through plastic or glass up to
100 mm ( 4”) thick. Even gloves won’t
stop QT110, QT111, QT112, QT113,
QT115, and QT118H from detecting
a touch. Even better, QT113 and
QT118H are also able to sense moisture. So sweaty hands, beware.
The QT11x family of chips are as
easy to use as they are inexpensive.
Just slap an external sampling capacitor on it, add a detecting electrode, and
zap it with around +3V and you have
the perfect touch sensor. Furthermore,
the chips all feature auto-calibration,
drift compensation, and automatically
calibrate themselves after a time out.
As for applications, QT11x chips
are found in a wide variety of commercial, real-world devices from pay
machines to door actuators. QTouch
chips really shine in sampling for the
presence of water, or, as an actuator
switch embedded in a receptacle
for receiving outside input without
having to drill a hole in its exterior.
If you’re looking for a painless
way to experiment with the QT11x
family of touch sensors, then look no
further than Quantum’s E11x
QTouch™ Evaluation Board. Like so
many other manufacturer evaluation
boards, the E11x is loaded with lots
of powerful features for allowing you
to fully experiment with touch sensitivity sensors. Both visual and audio
touch indicators are included with the
E11x and you can easily plug your
own external electrode into the board.
Oh, and an electrode can be nothing
more than a piece of metal foil or a
loop of wire. All of this and more for
less than $20 from Digi-Key.
It’s Sony Time for Europe
Photo courtesy of SCEE.
NUTS & VOLTS
Circle #44 on the Reader Service Card.
On the 76th anniversary of the
German invasion of Poland,
Sony Computer Entertainment
Europe (SCEE; www.scee.com) will
unleash the PlayStation® Portable
(PSP™) on Europe, September 1,
2005. Packaged in a Value Pack system configuration similar to its North
American cousin, the European Value
Pack will retail for 249 EUR. If you’re
like most hackers, then you must
think that the Sony PSP is a treasure
trove just waiting for the right solder-