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EMIC volume — Parallax Forums

EMIC volume

jcbarberjcbarber Posts: 37
edited 2006-11-24 22:08 in BASIC Stamp
Hi
I have a EMIC modual that I have retrofit to the BOE and have noticed when running the EMIC_demo program downloaded from Parallax that it resets at volume values above 5. I have it hooked up to a 8 ohm .3w speaker and it works great at volume values 5 - 0. Any ideas?

JCB

Comments

  • boeboyboeboy Posts: 301
    edited 2006-11-24 18:09
    Does every thing else work?
  • Tracy AllenTracy Allen Posts: 6,664
    edited 2006-11-24 18:37
    It is probaby overloading the power supply on the sound peaks. I have seen that too. You need a more capable 5v power supply and/or a good bypass capacitor.

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    Tracy Allen
    www.emesystems.com
  • Tracy AllenTracy Allen Posts: 6,664
    edited 2006-11-24 22:08
    The 5 volts provided by the BOE voltage regulator should be able to provide enough current. Connect a big capacitor across the EMIC power supply right at its pins. I think there is a 3000uf electrollytic capactor that comes with the WAM book or others that use the servos. That would be a good one to use. Is the EMIC mounted right on the BOE? Connect the EMIC power as directly as possible to Vss and Vdd.

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    Tracy Allen
    www.emesystems.com
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