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Author Topic: Need guidance on implementing a baby monitor using arduino  (Read 1968 times)
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Attached is a block diagram of the basic idea of the project.

1) I want to know if I can use arduino as the micro controller in the project?
2) Do I need to amplify the sound from mic and filter to minimize background noise?
3) Also whether I can connect a transmitter to arduino to transmit the sound from mic and receive it at the receiver?
4) Also I want to know whether arduino has its own program syntax/language? Or whether PicBasic can be applied?

Anyone with knowledge please give me some guidance. It will be truly appreciated.
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WARNING: Monitoring babies is serious business, you should at least think twice (and more) before doing this with Arduino yourself. Although commercial stuff can fail to it is at least tested (I assume).

Please describe the goal of your project
- what should it do
- how shuld it work
- what output do you expect given defined inputs (and undefined inputs)
- etc.

Back to the questions:
0) nothing attached
1) Yes
2) Possibly, Arduino cannot do sound processing, detecting amplitude can be done
3) Possibly, see 2. will be very low quality at best I think.
4) Own language, C/C++ alike, definitely no basic, but if you have programmed some time it should not be too difficult to pic up

More questions?

Warning still applies ! smiley-wink
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Rob Tillaart

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Please describe the goal of your project
- what should it do
- how shuld it work
- what output do you expect given defined inputs (and undefined inputs)
- etc.

- Alarm parent when any of 3 sensors detect anything. Mic detects baby crying.
- Sensors detect (temp, moisture, movement) and mic detects baby crying voice and cancels off as much background noise as possible. Then transmit the crying voice to the receiver. Or when sensors detect light up LED on receiver since each sensor has a LED attached to it to alarm.
- Mic is input for baby voice and output loud speaker on receiver.
- Sensors are input and outputs are respective LED's on receiver.

Also, can you explain to me your warning on doing the project. Is it that its hard to implement. I tried but cudn't attach the image.


* Block Diagram.png (8.01 KB, 501x267 - viewed 55 times.)
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Also, can you explain to me your warning on doing the project.

The warning is not that it is difficult but that it is about a living baby. From ethical point of view it is completely different than a weatherstation or an automatic garage opener of a fridge is not closed detector etc.

BTW: a weatherstation has partly similar complexity,  so searching for them will give you lots of info about how to do your project.

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Rob Tillaart

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This will make the Mic preamp, noise reduction, compression part of your project easier.  It is a free sample:
http://www.datasheetcatalog.org/datasheet/analogdevices/SSM2166S.pdf

I've been able to sample audio using no additional hardware besides the Uno.
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I've been able to sample audio using no additional hardware besides the Uno.

If so, why do I need to make the circuit you proporse?

This will make the Mic preamp, noise reduction, compression part of your project easier.  It is a free sample:
http://www.datasheetcatalog.org/datasheet/analogdevices/SSM2166S.pdf[/font]
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Sorry for the confusion.  None in addition to my link.  I meant you do not need any filters or other IC's.  You need to make a Mic preamp before the A/D.  You can use my idea, or make a simple one with an Opamp.  I disagree with Rob the quality is quite good for voice!
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It is also important to consider on how to put baby monitor on the bed room of your baby and of course you should set up the proper wiring and transmitter that you put on your baby monitor.
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