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Replies （6）
  • Topic: Audio Shield
    You Reply: Hector,

    I should have been more clear.

    I am referring to the DFR0064, 386AMP audio amplifier Module (Arduino compatible).

    Do you have a schematic for this?  I'm using a PWM audio input to this device but I'm not getting any amplification.  The audio from the speaker is the same as using a simple resistor between PWM and speaker itself.  I must be doing something wrong and a schematic might help me troubleshoot.

    Thanks,

    Jim
  • Topic: Arduino Power Question
    You Reply: Hector,

    I have one more followup question in regards to I/O Expansion Shield Power.

    It appears that most servo devices have an operating voltage range of 4.8-6V.  This is a rather limited range for use of attaching a battery to the J17 VCC connector for servo power.  There is no regulator on the I/O Expansion Shield.

    What do you recommend for battery power to I/O Expansion Shield J17 VCC connector?

    Thanks,

    Jim
  • Topic: Servo DF05SR
    You Reply: Hello Hector,

    Thank you for the suggestion on servo selection for 180 degree operation.

    Can you describe for me then how to control the DFR05SR when considering it to be a motor with speed control? 
    How do I then control speed and rotation direction?  This is obviously different than the Motor Control shields which have separate DIR and PWM controls. 

    I must be able to control direction somehow since using the example application in arduino/libraries/Servo makes the DFR05SR rotate in both directions.  I just don't understand what to do with the one Control Signal on DFR05SR.

    Thanks,

    Jim
  • Topic: Arduino Power Question
    You Reply: Hello Hector,

    Thank you very much for the schematic and advice.

    Jim
  • Topic: Servo DF05SR
    You Reply: Hector,

    Okay, I didn't realize that a 360 "servo" isn't really a "servo".  How do I differentiate the two types from the web site description?  I want a servo to pivot a Ping Sensor in a 180 degree range.  What do you suggest?

    Thanks,

    Jim
  • Topic: Arduino Power Question
    You Reply: I have found that if I attach my 7.5 volt battery pack or 12V wall wart to the 2A motor shield power input, I can operate my motors, arduino, and servos on I/O expansion shield.

    Since I don't have the schematic for the 2A motor shield, I'm not quite sure how this works.  Can we get a schematic posted for the 2A motor shield?

    I figured out that the I/O expansion shield has a diode from +5V to VCC, which explains why the servos work without power on the VIN connector.  The servo is getting power from +5V, which I realize is not good.

    My I/O expansion will have 1 Servo, 1 Ping Sensor, 2 Wheel Decoders, Microphone Input. 

    If I limit myself to only 1 Servo on the I/O expansion shield, do you think it's okay to draw from the 5V arduino regulator?