Hi, Hank
Why not use a simple NE 567, which will do all the job ???
Alain
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Make it simple ???
Hi, Hank
Why not use a simple NE 567, which will do all the job ???
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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Were the fun in that?!Originally Posted by Acetronics
Seriously, I've already got a PIC in my circuit with a fair amount of unused pins...I could quite readily utilize one of those pins to give me the note info - I don't need much in the way of granularity - just frequency resolution down to rough semitones, which I reckon the PIC I'm using ought to be able to establish reasonably easily. I also don't want to add in more components if possible (hence using the PIC since it's already there!)
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???????????????originally posted by hankmcspank
Were the fun in that?!
Robert
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???????????????
Robert
just wait and see ...
and finally laugh.
Alain
************************************************** ***********************
Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
************************************************** ***********************
IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
*****************************************
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I meant if simply used dedicated ICs to solve each and every one of my needs - I wouldn't learn anything about PIC programming (the fun bit)???????????????
Robert
it was a meant to be a quip.
If I'm to grasp PIC programming, then I need a small bite sized goal/challenges (& grasp some concepts)...sure there's normally dedicated h/w for just about everything nowadays, but I won't learn much if I simply throw in a dedicated IC for each & every requirement....hence my line of questiong & reluctance to add in extra h/w,
Last edited by HankMcSpank; - 7th March 2010 at 13:45.
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If you have a super clean sine wave signal with no distortion, you might be able to do this with a pic that is also performing other tasks. Otherwise, it is a very difficult task involving FFT or DFT programming--certainly not the standard place to start learning PIC programming. (And PBP is a pretty code-heavy compiler, so it may not be able to process the data fast enough, even as slow as 150Hz.)
The biggest drawbacks I see to the NE567 is high voltage requirement and high current draw. On the other hand, it is the perfect simple solution to a potentially challenging problem.
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Well it's not my first PIC project - that was PIC AGC...then I got the relaxtaion ocillator setup to do PIC capaciitve touch - but this is my first exploration into frequency counters (ie my latest goal if you like)
Re the waveform, I'd be trying to glean the frequency after the complex harmonics have dropped out, here's the waveform (it's been amplified to get it up nearer the 5V that the PIC prefers) ....
...pretty clean & pretty sine-waveish too!
ok, if you think it's do-able, I'll push on & give it a pop.
So what would be the best way to set up a 100mS sampling 'window' to see how many transitions (cycles) the comparator has toggled in that time?
Last edited by HankMcSpank; - 7th March 2010 at 16:55.
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