‫Welcome to the microphone interface demonstration with the RTC 7 development board first demonstration.
‫We have added fruit's microphone breakout board that we're connecting into an external breadboard where
‫the breakup board has three different outputs an out which is the analog signal output and we're feeding
‫that into a zero and all input on the Arties the seven develop inboard of the chip kit slash Arduino
‫Hetter.
‫We're taking the ground and tying it to the ground which is then fed into the ground on the JVP made
‫port and our VCC.
‫We're doing the same thing we're tying that to 3.3 volt supply on the Jaymee p.m.-I port.
‫It is microform works as it takes the sound waves are generated from a human you talk or any any sound
‫waves and turn them into vibrations a little output a wave form that then gets sent into the zinc chip
‫on RTC 7 board where we have the CDC core that is sampling this at a very high rate at approximately
‫200 thousand samples per second.
‫And then we have the delay we created that sits there and every and 40000 times a second samples that
‫input.
‫And so what that means is this will only pick up or will only display sounds that any humans can hear.
‫So if we can't hear any sound we should see no lights light up.
‫But if any sound we can hear from my voice your voice or music anything you'll see all the ladies light
‫up.
‫And so I'm going to go ahead and we're going to enable the switch pull it down and just see how this
‫house works.
‫Posts down so you can see as I talk you can see the one Elodie kind of sort of light up or fades away.
‫If I start talking
‫it's very faintly there like it's almost barely not even there.
‫But if I talk louder talk a little more directly into the microphone.
‫You can see yellow light up.
‫And also if I would do something like clap my hands you'll notice all the ladies should light up some
‫or do a couple claps
‫and you'll see as I caught my hands.
‫All the ladies light up.
‫Now what's really cool about this what you can use it for is you can use this to synthesize the music.
‫So I'm going to place a music directly into the microphone and you'll see as I'm playing the music the
‫melody is a light up and dance and it's really cool.
‫So
‫and So this is a really cool thing you can do with this type of project where if you have a whole strand
‫of ladies you can use the microphone analog input such as the ADC core on your Develin board to take
‫those analog inputs turn them to digital and display them on Ltds which is pretty cool because it makes
‫it look like the lights are dancing to the sound of the music and really they are.
‫But this is a really cool thing to do.
‫And this is just one small thing of what you can do with say a microphone in your FPGA.
‫But now that you have the tools and the know how to take a microphone output and feed it into your FPGA
‫you can do whatever you want with it at this point.
‫That is an example of the microphone interface running on the RTG 7 development board.