So, I have tried searching the forum and the tutorials regarding a static noise coming from my new (came today) EZ-B4 without finding anything, and I hope someone that has been using it for some time can help me out.
The unit is a clean "DIY" EZ-B v4 Controller. It has the camera and the Ultrasonic sensor attached (but makes the noise without them also). I am powering the EZ-B with a 7.2v power supply (makes no noise on its own), that is attached to the EZ-B using the EZ-B alternate power source plug.
All seems to work well. Only thing is I havent been able to configure the microphone. When pressing the "settings"-icon in the Microphone-control-panel, I get an error message saying "Unhandled exeption has occurred in your application ... If you ... Object reference not set to an instance of an object"
Application works fine if I click "Continue".
Another error I get is when in RoboScratch and trying to play a "wait for Speech" The error is displayed in the "code output panel" at the bottom of the screen, and reads:
"WaitForSpeechCommand Error: System.InvalidOperationException: No audio input is supplied to this recognizer. Use the method SetInputToDefaultAudioDevice if a microphone is connected to the system, otherwise use SetInputToWaveFile, SetInputToWaveStream or SetInputToAudioStream to perform speech recognition from pre-recorded audio.
at System.Speech.Recognition.RecognizerBase.RecognizeAsync(RecognizeMode mode)
at System.Speech.Recognition.SpeechRecognitionEngine.RecognizeAsync(RecognizeMode mode)
at EZ_Builder.UCForms.FormWaitForSpeech.WaitForSpeechCommand(Int32 timeout, String phrases)"
I am thinking I will figure out how to set up and / or test the microphone If I really get into this. Just wanted to mention it if it could possibly be related to the noise-thing...
It is not a loud noise, just a half-rytmical static "chatter" or erratic "humming" that resembles some kind of voltage regulator or actually very similar to the noise an old analog AC automatic on / off timer would make as it spins / ticks through its timing cycle.
Does anyone else have this kind of humming static noise when EZ-B4 is powered by 7.2 - 7.4 vdc from alternate power source? Is it a voltage regulation thing that I can get rid of by using another power source or by lowering or increasing voltage to the EZ-B? Is this just the way it is supposed to be? Any chanse it could be related to Mic or speaker?
Thank you all in advance. I would love it if I did not have to experiment too much on the input power unless someone advices me to do so.
(Please be gentle. This is my first robo-anything ever, and I am finding it all very exiting and extremely confusing