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Sound Sensors

Hey Everyone!

I am currently stuck on how to code these 2 sound sensors (1 on left, 1 on the right)(picture below) on the head of my robot. I have a servo (D18) that goes up to 180 degrees and I want the head to turn towards the loudest noise level. I have looked at some examples and I still dont have any progress.

Any help would be appreciated

Thanks,

Cameron
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#21  
uncomment out the 3rd and 4th line and then comment out the 5th and 6th line in the second script listed above.

What are the values that are being seen in the variable watcher when this runs?
#22  
Just saw a mistake in the script and fixed it. You might have to change the servo value for left and right in the first script, and then also adjust the values in the if($LevelLeft>500 or $LevelRight>500) to be lower, but you will have to test and see what values you are getting in the Variable Watcher.
#23  
I put those you posted in 2 seperate ones. And only one will last a few seconds. Is that right? Or shoupd they both stay on? Both values are over 12,000
#24  
1 will just run for 3 seconds to move the servo. The other one will run in the loop to read the sensor. The sensor one will stay running.

Now you just need to modify the multipliers and the 500's to be what works for you.

Why do I do it this way? I am glad you asked:)

This will let you test the motor movement by itself. Once you know the motors move like you want it to, you can quit messing with it and know it will work. You can also reuse this script for other sensors added later if you want to.

The sensor reading script can be tested without calling the servo script. Once that one works as you expect, you dont have to worry about it anymore and can reuse it if you want to.

I try to make my scripts do one thing only to eliminate extra stuff in a script that makes it difficult to change or modify in the future.
#25  
@CochranRobotics

I adjusted the values a few times and it still goes to one side and not the other. Here is the script I am using:

Code:



Servo(D18,90)
$Direction=0
$L=0
$R=0

:loop

repeat($x,0,2,1)


$Left=GetADC(adc0)*100
$Left_T=$Left+$L
$L=$Left_T

$Right=GetADC(adc1)*100
$Right_T=$Right+$R
$R=$Right_T

Sleep(1000)

endrepeat

$Direction=$Left_T-$Right_T

if($Direction>-100)
Servo(D18,180)
Sleep(1800)
$Direction=0
$Left_T=0
$L=0

Elseif($Direction<-100)
Servo(D18,1)
Sleep(1800)
$Direction=0
$Right_T=0
$R=0

endif

$Left_T=0
$Right_T=0
$L=0
$R=0

Goto(loop)



I even tried the 2 put together you posted and it still did the same thing. I know I am missing something here just not seeing it...
#26  
Hi Cameron, I posted that script. Have you ran the script in the RUN window to see if you are getting the <-100 and/or >-100 values for each sensor, if so, are you? If not, perhaps there is something wrong with a sensor. Try switching the sensors around and see what happens
#27  
@bhouston

Yeah im sorry i meant to add you to the thread as well. I have ran the script multiple times and it does show 1 having a bigger value in the variable list. But at another time they are both over 100. I'll try again and even switch them like you said.

Thank you
#28  
Run it in this window and you can see exactly what the script and the sensors are doing as you run the script.
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#29  
I see that you have - if($Direction>-100) - I think it should be >100.
#30  
What is the "*100" in the following part of the script:

Code:


$Left=GetADC(adc0)*100
$Left_T=$Left+$L
$L=$Left_T

$Right=GetADC(adc1)*100
$Right_T=$Right+$R
$R=$Right_T


Are you trying to comment out the 100 for your reference? Unless I was not aware of this being OK, I don't think you can use a * to comment out something. I've always used this character: #
#31  
it was to make the value obviously high.

I think he has a sensor that os messing up or reporting much lower than the other but that is just a guess.
#32  

Code:


it was to make the value obviously high.


So this * forces the ACD reading to a wanted value? I'm not understanding this. Sorry. Can't find this in the EZ Script manual. *confused*
#33  
if the value is 50 from the adc reading, it makes it 5000. if it is 51, it makes it 5100. it was an attempt to get the values high enough as I didnt know what he was getting at the time. It could gave been *10 but I just set it to something in his script to see what he was getting for a value.

It may be that one mic has a lower return for some reason. He can use this multiplier to get both of them close to the same by setting one to *84 and the other one * 100 for example.
#34  
Going back to the reason that this should be in two scripts like before, the motor can be tested to work correctly, which it was. The other script can be used to test the sensors and adjust a multiplier as needed for each ADC sensor.

Use this script and then follow the directions recording the values of the left and right sensor after the value is stated by the robot. This should help you determine what is going on.

Code:


saywait("Say something in front of me")
Sleep(1000)
$LevelLeft = GetADC(adc0)
$LevelRight = GetADC(adc1)

saywait("My left sensor is reporting " + $LevelLeft)
saywait("My Right sensor is reporting " +$LevelRight)

Sleep(1000)

saywait("Say something in on my right side")

sleep(1000)

$LevelLeft = GetADC(adc0)
$LevelRight = GetADC(adc1)

saywait("My left sensor is reporting " + $LevelLeft)
saywait("My Right sensor is reporting " +$LevelRight)

Sleep(1000)

saywait("Say something in on my left side")

sleep(1000)

saywait("My left sensor is reporting " + $LevelLeft)
saywait("My Right sensor is reporting " +$LevelRight)

Sleep(1000)

#35  
There is a pot on the back of the sensor. You can turn this to increase or decrease the level that is reported if the sensors are not reporting similar values when you are speaking from the front, or if the left is reporting lower than the right when speaking on the corresponding side.
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#37  
Hey Everyone just wanted to touch base and say thank you for all that you guys have posted to help me. I really appreciate it.

The closest I got to set them to are:

Left Side 86
Right Side 78

I tried to adjust and made them as close as i could with the sound test script that @CochranRobotics put up and it did help. Now I just need to figure out how to adjust and multiply accordingly?

Here is the script I have been trying to still use: (Which I have messed around with numerous times and still nothing)

Code:


Servo(D18,90)
$Direction=0
$L=0
$R=0

:loop

repeat($x,0,2,1)

$Left=GetADC(adc0)*70 #adjust this value
$Left_T=$Left+$L
$L=$Left_T

$Right=GetADC(adc1)*70 #adjust this value
$Right_T=$Right+$R
$R=$Right_T

Sleep(1000)

endrepeat

$Direction=$Left_T-$Right_T

if($Direction>100)
Servo(D18,180)
Sleep(1800)
$Direction=0
$Left_T=0
$L=0

Elseif($Direction<-100)
Servo(D18,1)
Sleep(1800)
$Direction=0
$Right_T=0
$R=0

endif

$Left_T=0
$Right_T=0
$L=0
$R=0

Goto(loop)
PRO
USA
#38  
Maybe i'm wrong... I don't think the initial idea will work.

The OP hardware is this:
https://www.adafruit.com/product/1063

this is not a sound sensor, this is a microphone with an amplifier, if you read the documentation you will find:

Quote:


The output will have a DC bias of VCC/2 so when its perfectly quiet, the voltage will be a steady VCC/2 volts (it is DC coupled).


this means in a perfect scenario no sound will be 128 = VCC/2, also the value will oscillate below and above the DC Bias.

more info here:
http://www.instructables.com/id/Arduino-Audio-Input/

bhouston posted a thread:
https://www.ez-robot.com/Community/Forum/Thread?threadId=6814

The hardware used is different:
v2 version:
https://www.dfrobot.com/wiki/index.php/Analog_Sound_Sensor_SKU:_DFR0034
v1 version
https://www.dfrobot.com/wiki/index.php/Analog_Sound_Sensor_(SKU:_DFR0034)
I'm not 100% sure but the amplification (check the schematic) is different is a linear value.

In the same thread, Richard mentioned an ebay sound module similar to this one:
http://henrysbench.capnfatz.com/henrys-bench/arduino-sensors-and-input/arduino-sound-detection-sensor-tutorial-and-user-manual/

the sensor is different, you setup a set point, and the sensor will return a single value HIGH or LOW if the sound is above or below the set point.

If someone has a working solution, please share the hardware/script used.
#39  
@ptp... Good catch man.... That would explain why simple code isn't working with it... This one should work. It has both analog and digital output and it works with 3.3V
Sound sensor
#40  
@ptp

Thank you for your help with that. And thank you to everyone else as well.

@Richard R thank you as well. Ill get that sensor