Ideas and thoughts about a 2 knob control approach for the PIC oscilloscope

[Nico Coesel]

mm, yes, that is possible, in that case you are out of luck if they also
patented potentiometers.
But why pulse encoders? The PIC ADC is 10 bits, there is visual feedback,
if too many items, then I can perhaps software scroll the list horizontally.

How about a touch-screen? You could make any kind of control anywhere
on the screen. Something like double-tapping the signal and beying
able to drag it to change the offset would be cool.

 

[Jan Panteltje]

How about a touch-screen? You could make any kind of control anywhere
on the screen. Something like double-tapping the signal and beying
able to drag it to change the offset would be cool.

Yes, that is a great idea, Iphone like touch screen.
Somewhere else in this thread we found that those touch screens are still
about 50 Euro (not counting extra electronics for processing), while I pay 15 Euro for
the LCD and maybe 3 more for 2 pots.

But indeed, if touch LCD drops in price I will experiment with one
The other limitation is perhaps display size, and the width of a finger...

 

[Nico Coesel]

Yes, that is a great idea, Iphone like touch screen.
Somewhere else in this thread we found that those touch screens are still
about 50 Euro (not counting extra electronics for processing), while I pay 15 Euro for
the LCD and maybe 3 more for 2 pots.

But indeed, if touch LCD drops in price I will experiment with one
The other limitation is perhaps display size, and the width of a finger...

At work I make touch-screen controlled devices (well, it is my duty
get the software and hardware going . It appears the touch screens
are quite precise. It is no problem to use a regular slider / scroll
control in its original size to adjust a value.

 

[Jan Panteltje]

At work I make touch-screen controlled devices (well, it is my duty
get the software and hardware going . It appears the touch screens
are quite precise. It is no problem to use a regular slider / scroll
control in its original size to adjust a value.

Good, nice to hear that.
What make display are you using?

 

[[email protected]]

Every time they're changed, or is there an explicit save command? I
like battery-backed sram for saving a current machine state, because
it's fast and doesn't wear out. EEPROM is good for explicit setup
saves.


What's bizarre about theKeithley 2100is that it does have a save
function that saves to nv memory, but the most needed settings don't
get saved, and the really obscure ones do. It always powers up at 60
display updates per second, so the rightmost 3 or even 4 digits are an
unreadable blur.

Pity: it's electrically superb, but the user interface wrecks it. Yet
another example of good electrical engineering trashed by clueless
programmers.

Hey google indexer, grab this:Keithley 2100review

John

I saw this post _after_ I bought my Keithley 2100. It's unbelieveable.
I started writing a review on it as soon as I got it, which I will
turn into suggestion list for Keithley. I don't know what the rest of
their stuff is like, but whereas my first Fluke made a big impression,
this has probably put me off Keithley for life. I'm really angry that
they waste keys, but put "hold" on a shifted key!

When yours is rapidly updating the display do you find it to be
erratic? I mean that the display has regular pauses, like there is
some kind of I/O contention or buffer filling up. It's not what I
expected.

My review is nowhere near ready yet but please let me know if you
think I've got it wrong so far! This is my first review of anything.
http://neilkalo.googlepages.com/keithley2100

What have you compared it with to rate the electrical performance?
Sadly this is the best meter I have got accuracy-wise, so I have
nothing to compare it to. It would be comforting to know that I
haven't completely wasted my money.

Neil