Comments on: Cheap Sound Sensor for AVR http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/ Alex' blog Tue, 15 May 2012 14:02:06 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Alex http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-314788 Alex Fri, 30 Mar 2012 12:43:31 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-314788 Hi Luu, you probably can't see changes on a voltmeter because it's too slow and the changes are too small. Cheers, Alex Hi Luu,
you probably can’t see changes on a voltmeter because it’s too slow and the changes are too small.
Cheers,
Alex

]]> By: Luu http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-314275 Luu Tue, 27 Mar 2012 10:11:49 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-314275 Hi Alex,I measured the output of the BJT used VOM and found it to stand still in a position (with sound-needle run). The sound sensor true or false? I don't connect with AVR,i just test by voltage-VOM! PL help me,thank for your watching my question! Hi Alex,I measured the output of the BJT used VOM and found it to stand still in a position (with sound-needle run).
The sound sensor true or false? I don’t connect with AVR,i just test by voltage-VOM!
PL help me,thank for your watching my question!

]]> By: Designing Simple Sound Sensor Circuit Diagram | Circuit diagram wiring http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-313116 Designing Simple Sound Sensor Circuit Diagram | Circuit diagram wiring Mon, 19 Mar 2012 19:50:55 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-313116 [...] following page outlines detail description and explanation on how to design a Simple Sound Sensor Circuit Diagram [...] [...] following page outlines detail description and explanation on how to design a Simple Sound Sensor Circuit Diagram [...]

]]> By: Alex http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-308144 Alex Thu, 16 Feb 2012 07:20:19 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-308144 You're right, it's only one. You’re right, it’s only one.

]]> By: Cory http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-308139 Cory Thu, 16 Feb 2012 06:36:07 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-308139 In the tutorial, you say you used 2 capacitors at 0.1uF but, i only see one in your design and schematics. Where is the second one located (if there is a second)? In the tutorial, you say you used 2 capacitors at 0.1uF but, i only see one in your design and schematics. Where is the second one located (if there is a second)?

]]> By: Krzysiek http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-305999 Krzysiek Mon, 30 Jan 2012 22:34:38 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-305999 The diffrence between adc output is probably caused by AVREF specification. In atmega88 u can choose between AVcc/1.1V/AREF . I calculated aprox values with diffrent VRefs and thats what i got: for AVcc ~ 176 for 1.1V ~ 800 the formula is very simple ADC = AIN/AVREF * 1024 PS. I used BC337 and output voltage was 0,86V. PS2. Nice and simple amp :) The diffrence between adc output is probably caused by AVREF specification. In atmega88 u can choose between AVcc/1.1V/AREF . I calculated aprox values with diffrent VRefs and thats what i got:

for AVcc ~ 176
for 1.1V ~ 800

the formula is very simple ADC = AIN/AVREF * 1024

PS. I used BC337 and output voltage was 0,86V.
PS2. Nice and simple amp :)

]]> By: saqib http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-305965 saqib Mon, 30 Jan 2012 16:46:57 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-305965 hey, i was jus wondering if i can put the output from the amplifier into an arduino uno? hey, i was jus wondering if i can put the output from the amplifier into an arduino uno?

]]> By: Moritz http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-304313 Moritz Sun, 15 Jan 2012 14:26:48 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-304313 Sorry for the double post. It works just fine with a value of 800 now! My problem was, that I sent every single value to my console with printf and therefore the programm was to slow. Now it is really sensitiv, even to the sound of me writing on my keyboard! Again thank you for this real simple but great sound sensor! Sorry for the double post.
It works just fine with a value of 800 now!
My problem was, that I sent every single value to my console with printf and therefore the programm was to slow. Now it is really sensitiv, even to the sound of me writing on my keyboard!
Again thank you for this real simple but great sound sensor!

]]> By: Moritz http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-304310 Moritz Sun, 15 Jan 2012 13:54:50 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-304310 Hi, thank you for this great setup. We built a RGB-LED Controller in a project and I added the Sound Sensor. We used only SMDs, so I choose the MMBT3904 instead of the 2N3904. Well, it does work. But I have the same problem as Josh(#38). My ADC output value is allways around 800 (10bit). And it only varies about +/- 10 when I play some sounds, so it is very tricky to find the right trigger level. What is your difference between silence and sound? I used an MCE101 instead of the MCE 100 but the only difference should be the cable... Has anyone an idea what could cause my high level? Hi,
thank you for this great setup. We built a RGB-LED Controller in a project and I added the Sound Sensor. We used only SMDs, so I choose the MMBT3904 instead of the 2N3904. Well, it does work. But I have the same problem as Josh(#38). My ADC output value is allways around 800 (10bit). And it only varies about +/- 10 when I play some sounds, so it is very tricky to find the right trigger level. What is your difference between silence and sound? I used an MCE101 instead of the MCE 100 but the only difference should be the cable… Has anyone an idea what could cause my high level?

]]> By: Alex http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/comment-page-2/#comment-300279 Alex Sat, 24 Dec 2011 09:08:49 +0000 http://tinkerlog.com/2007/05/20/cheap-sound-sensor-for-avr/#comment-300279 It's only a couple of bucks. Only cents if you don't count the microcontroller. It’s only a couple of bucks. Only cents if you don’t count the microcontroller.

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