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skyone

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Posts posted by skyone

  1. would be good if you added some code so you could hold the selector button down for a few seconds to start back at the beginning. 

     

    Awesome stuff !!!   :jc_doublethumbup:

    i  remember i tried to add this feature but i couldn't find the correct code .. :/

     

     

    Hi Chivo

     

    that's a good idea pressing the button longer to get the first sound.

    I implemented this feature to switch the LED in may scope on and off with the sound selector button.

    So i will implement this on my realod button. Press it short < 2 sec then reload press lond >3 Sec go to the first sound. Thanks for the idea

     

    if you like you can share your code here to make this project go further and better :)

  2. i just discovered another mp3 sound module even cheaper and smaller that might fit this project

    just ordered for a test ;)

     

    http://www.aliexpress.com/item/Free-Shipping-1pc-MP3-module-U-disk-TF-card-serial-sound-card-card-reader-module/1404739474.html

     

    822547948_401.jpg

     

    822547956_538.jpg

     

    this module is similar to this but it's not the same,  it is better because does support the serial communications with arduino

     

    it also has a LM4871 build in amplifier (3w@3ohm or 2,5w@4ohm)

     

    pdf datasheet and serial commands manual

    http://www.dfrobot.com/image/data/DFR0299/DFPlayer%20Mini%20Manul.pdf

     

    as stated on the manual, it is important to add a 100ohm resistor between the RX of the mp3 and TX of the arduino because of different TTL voltage (3.3 vs. 5v)

     

    edit:

    i also found a support page with library and code

    http://www.dfrobot.com/wiki/index.php/DFPlayer_Mini_SKU:DFR0299

     

    edit2

    fully tested

    not reliable:

    many problems with coding (needs its library because the serial string not only needs conversion to hexadecimal but also to calculate the checksum; the libraty code often doesn't do what requested; also, it needs to unplug power everytime the code is uploaded)

    audio loud but some background noise

  3. Looks great, really nice photos. A one inch wide elastic band enclosing the bottom of each bell will give the joined biceps and forearms a place to hang from and help keep them tight and forward facing.

     

    Sent from my SM-N900V using Tapatalk

    well actually they are there, but not much visible. I had a problem with the left elastic bell because the bicep touch the snap button everytime and make it release

  4. wow great work! it is always awesome to watch a scratch build/work, in your case electronic included :)

     

    can u tell us what batteries are u using in your project?

     

    also i didnt see but i guess that u are using just one speaker, isn't it?

  5. i worked this days on the project, that is almos finished but now i have another problem to fix

     - i can't use the same microphone of the audio sensor because it hasn't enought gain

    -  there is a background noise produced by the fans engines: EMI (Electro Magnetic Interference)

     

    so i have to:

    - add an external microphone with a pre-amp

    - probably add a capacitor to avoid the noise [edit: added 2x 1800uF 6.4v capacitors at fans terminals and noise is gone - i finally used those capacitors that a chinese seller sent me in error instead of leds that i ordered some time ago haha]

     

    actual wip

    21479370_helmet_kit_arduino_proto.jpg

  6. i am working on a new project using the arduino microcontroller to give to the stormtrooper helmet new features:

     

    - 2x fan brushless cooling blower fan with themperature sensor control

     

    - voice amplifier 3w+3w

     

    - static burst effect added at the end of talking

     

    - loop stormtroopers random talking when idle

     

     

    the set includes:

    Arduino Nano 328
    http://www.ebay.it/itm/200964325858?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
     

    DHT 11 temperature sensor

    http://www.ebay.it/itm/DHT11-DHT-11-Digital-Temperature-and-Humidity-Sensor-Temperature-sensor-Arduino-/400489574221?pt=LH_DefaultDomain_0&hash=item5d3f09ef4d
    http://learn.adafruit.com/dht/overview

    WT5001M02-28P Mp3 sound module

    http://www.aliexpress.com/item/WT5001M02-28P-MP3-Voice-Module-SD-Card-Module/2050529179.html
    http://www.microelectronicos.com/datasheets/WT5001.pdf

    LM393 Sound sensor
    http://www.ebay.it/itm/171219012684?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

    d.s. http://www.ti.com.cn/cn/lit/ds/symlink/lm393-n.pdf

    (but i think this is better http://www.ebay.it/itm/161245499808?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649  because support the analog reading of sound so i might change to it)

     

    2x fans 5volts 0,10 Amp

    http://www.aliexpress.com/item/5015S-5V-0-1-0-3A-Black-Brushless-DC-Cooling-Blower-Fan-50x15mm-hv3n/1244855982.html

     

    2x NPN transistors 2N2222A (40V 0,8A)

    http://www.ebay.it/itm/SALE-New-20-pcs-X-2N2222-2N2222A-NPN-40V-0-8A-Transistor-TO-92-/200964739171?pt=LH_DefaultDomain_0&hash=item2eca6e9063

     

    mini amp 3w + 3w
    http://www.ebay.it/itm/181303482967?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
    d. s. http://diodes.com/datasheets/PAM8403.pdf

     

    voltage regulator 5volts 1A

    http://cgi.ebay.it/ws/eBayISAPI.dll?ViewItem&item=171178535811

     

    the power supply is based on 6xAAA rechargeable batteries (2 boxes linked in serie) for a total of 7.2v (800mAh). I prefer to have the safer nickel–metal hydride (NiMH) batteries inside the helmet rather than lithium ones.

     

    this is the actual scheme (not final and not 100% tested)

    21200842_helmet_set2_schem.png

     

     

    the end project should include 4 small boxes: 2 batteries boxes, 1 box for arduino, 1 box for mp3/amp modules, plus microphone and themp sensor.

     

    today i had to stop the work because i realized that i need an external 5v voltage regulator to give enought power to all the components. So i must wait around a month the delivery from china of that component to start again working on it.

     

    See you on the next stage (maybe final :) )

     

     

    in this picture u can see the themperature sensor (blue) and the fan activated by transistor and arduino

    20140326_232951_1.jpg

     

     

    the actual stage (arduino nano linked to mini-usb)

    20140402_200036_1.jpg

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