- Mon Oct 30, 2006 4:20 pm
#21198
Hi all,
Well, I'm busy trying to capture sound with my PIC. Not being an Electronics person, this is an arduous and painful task!!!
BUT (theres always a big but... )
I have done the following...
I purchased a kit : http://www.jameco.com/Jameco/Products/ProdDS/151204.PDF
that captures sound and plays it on a speaker/headphone.
this is what i'm trying to do
#1. Capture sounds via a mic and have the Pic read it via the ADC pin
#2. pass this data to another pic and play it on a speaker/headphone
I'm not converned at this time about compression, quality etc., just that I can capture, pass and play.
Now some electronics questions oh kind people...
#1. The kit does 2 things, capture, amplify and play (okay 3 things). At what point do I capture the data? At the output of the first opamp or the second? The second has a trim pot for volume control. My thinking is the first.
#2. Once I capture the data, pass it and want to play, I need a DAC. Someone mentioned using a MAX517 http://datasheets.maxim-ic.com/en/ds/MAX517-MAX519.pdf. This requires an SPI interface (no big deal), but is there a non spi solution thats simple (remember my electronics skills )
#3. The microphone. http://www.mouser.com/catalog/specsheets/KT-400028.pdf. The example I'm using (the kit) is powered via a 9v, I would like it to be run via 3.3v since the pics are at that...I'm not sure how to calc the res/caps etc I would need...any thoughts?
Well, simple eh?!
Now to go and get drugs...(daughter has Tonsillitis , so Satan will be visiting us for the next few days... ...
~Kam (^8*
Well, I'm busy trying to capture sound with my PIC. Not being an Electronics person, this is an arduous and painful task!!!
BUT (theres always a big but... )
I have done the following...
I purchased a kit : http://www.jameco.com/Jameco/Products/ProdDS/151204.PDF
that captures sound and plays it on a speaker/headphone.
this is what i'm trying to do
#1. Capture sounds via a mic and have the Pic read it via the ADC pin
#2. pass this data to another pic and play it on a speaker/headphone
I'm not converned at this time about compression, quality etc., just that I can capture, pass and play.
Now some electronics questions oh kind people...
#1. The kit does 2 things, capture, amplify and play (okay 3 things). At what point do I capture the data? At the output of the first opamp or the second? The second has a trim pot for volume control. My thinking is the first.
#2. Once I capture the data, pass it and want to play, I need a DAC. Someone mentioned using a MAX517 http://datasheets.maxim-ic.com/en/ds/MAX517-MAX519.pdf. This requires an SPI interface (no big deal), but is there a non spi solution thats simple (remember my electronics skills )
#3. The microphone. http://www.mouser.com/catalog/specsheets/KT-400028.pdf. The example I'm using (the kit) is powered via a 9v, I would like it to be run via 3.3v since the pics are at that...I'm not sure how to calc the res/caps etc I would need...any thoughts?
Well, simple eh?!
Now to go and get drugs...(daughter has Tonsillitis , so Satan will be visiting us for the next few days... ...
~Kam (^8*
--
"Before you criticize someone, you should walk a mile in their shoes.
That way, when you criticize them, you're a mile away and you have their shoes."
"Before you criticize someone, you should walk a mile in their shoes.
That way, when you criticize them, you're a mile away and you have their shoes."