The Electro-Voice RE27N/D mic needs a control interface to make it work with your PC and recording software. After checking out two different interfaces, I selected the Elgato Wave XLR. The Wave XLR amplifies the small signal of the microphone, makes it easy to mix different audio signals, and has enough boast for monitoring with headphones.

The NotHans Podcast

If you are open to a little silliness, contagious giggles, and math lessons, check out the latest episodes of The NotHans Podcast. George has been the co-host and sounds great with the new microphone. Check out the last three episodes: Episode 33: Basketball Jones, Episode 32: Happy New Year, and Episode 31: The ABC Song.

Thanks, Dad! The torch has passed.

Along with the rest of the world, I have been working at home for the past couple of weeks. All of my meetings are now online/virtual ones and we use Microsoft Teams and Zoom. We also use video to better facilitate a connection and help us focus on the meeting. The camera that I have doesn’t have a light indicator showing whether it is in use. So, I put two and two together and come up with a remote controllable ‘On Air’ light for online meetings. It was the perfect project to entertain my three-year-old for a few hours. He was delighted every time the light turned on.

George and I ripped apart a Sunbeam Touch Light that I got for $1 in a surplus sale (you can use a Wi-Fi LED Strip). This light had a strip of LEDs, a controller, and a power supply. I just added an ESP8266 module and connected it to ThingSpeak using my tutorial that I published a few years ago. I wrote a little Visual Basic.NET script based on a project that I found on CodeGuru to detect whether or not the webcam was in use or not. If it’s in use, the script sends a signal to ThingSpeak to turn on the light.

Update – February 2021 – Python Script for Webcam State Detection

I have been getting requests for the code to detect my webcam usage. I did have a cobbled-together Visual Basic script that detected if my camera is in use or not and set the state of my On Air light accordingly. This approach was not very accessible, so I rewrote this in Python using OpenCV. Just run this code on a periodic basis to track the state of your webcam.

The code to track my webcam state and upload the state to ThingSpeak is now available on GitHub.

Most of the magic is here:

def returnWebcamStatus(webcamIndex):

    webcam = cv2.VideoCapture(webcamIndex, cv2.CAP_DSHOW)

    if webcam.isOpened():
        webcam.release()
        return True #Webcam not in use
    else:
        return False #Webcam in use

Update – August 2021 – No Code On-Air Light

I have been getting requests for a no-code version of my On Air light. Well, I have created a new tutorial that only requires some configuration instead of programming. This option uses a Wi-Fi LED Strip and a Stream Deck controller.

Check out the tutorial: No Code: On Air Light Controller For Live Streaming and Online Meetings.

Update – January 2023 – Easier DIY On Air Light

I got lots of comments on questions about my On Air light project. I realize that it was a little too DIY. I used parts that I had and it was not easy for others to reproduce. I just updated the project to be based on parts that you can get from Amazon or somewhere else pretty easily. I also took away the need for soldering by using a screw terminal board. I think more people will be able to build their own On Air Status Light for Teams or Zoom.