Proximity sensing
I took some of the great suggestions I received from some of you and
purchased the QT113 from Qprox (actually I bought the E11X prototype
board) and it works beautifully. But, I have the following
questions/problems:
I am not sensing proximity to the human body but rather sensing the
proximity of a wooden object. This does not seem to work as well as
the body and very dependent on the material of the object the board
is sensing.
1- What material are best for this application?
2- Do the circuit board carying the QT113 has to be insulated from
its surroundings?
3- How can I increase the sensing range? (I don't have lots of space
for an extended "sensing probe). I want to sense the presence of a
wooden peg that rotates and gets within 1/4" of the QT113 IC itself
on each turn. This way I will be able to calculate RPM as well as
triggering other actions done with a BS2. My frequency is about one
turn every .25 second.
4- The QUANTUM site does not have many example application circuits
and diagrams for their IC's. Can anyone point me to some example
circuits?
Many thanks in advance.
Al Najjar
purchased the QT113 from Qprox (actually I bought the E11X prototype
board) and it works beautifully. But, I have the following
questions/problems:
I am not sensing proximity to the human body but rather sensing the
proximity of a wooden object. This does not seem to work as well as
the body and very dependent on the material of the object the board
is sensing.
1- What material are best for this application?
2- Do the circuit board carying the QT113 has to be insulated from
its surroundings?
3- How can I increase the sensing range? (I don't have lots of space
for an extended "sensing probe). I want to sense the presence of a
wooden peg that rotates and gets within 1/4" of the QT113 IC itself
on each turn. This way I will be able to calculate RPM as well as
triggering other actions done with a BS2. My frequency is about one
turn every .25 second.
4- The QUANTUM site does not have many example application circuits
and diagrams for their IC's. Can anyone point me to some example
circuits?
Many thanks in advance.
Al Najjar