Making a WiFi Connected Audio Spectrum Analyzer with ESP32 -- Episode 570

Matt — Fri, 30 Sep 2022 07:24:00 GMT

Current Revision posted to Documents by Matt on 9/30/2022 7:24:00 AM

www.youtube.com/watch

This IoT/Web based Spectrum Analyzer uses a single ESP32 to create up to 64 channels to visualize the different audio bands.It uses only 6 external components to function .It has no LEDS or TFT screens but it uses a HTML webpage to display all the frequency bars. The ESP32 used is running on both processor cores. Core 1 is used to run the main loop of the program while core 0 is used to constantly update the webdata. Although the program itself makes it possible to run on a single core, using both cores will lead to better performance. This is so easy to build and program; you just have to try it! You won’t even have to install the ARDUINO software. Just use the web programmer to upload the precompiled binary file.

Supplemental Content:

Episode 570 Resources
Web Browser Programming: https://donnersm.github.io/WebSpecElement/flash.html
ESP32 Repository: : https://dl.espressif.com/dl/package_esp32_index.json

Layout	Schematic

Bill of Material:

Product Name	Manufacturer	Quantity	Buy Kit
Resistor	Te Connectivity	4	Buy Now
Capacitor	TDK	1	Buy Now
Switch Tactil	Te Connectivity	1	Buy Now

Additional Parts:

ESP32 DOIT DEVKIT V1.0. You can use other ESP32 but you will have to adjust the wiring accordingly

A breadboard or experimantal PCB to build the circuit on.

element14 presents | About Mark Donners | Project Videos

Tags: esp32, webserver, devkit, spectrum analyzer, DOIT, e14p_MD, Audio Visualizer, iot, arduino, friday_release

Episode 570: Making a WiFi Connected Audio Spectrum Analyzer with ESP32

pchan — Fri, 30 Sep 2022 13:41:34 GMT

Revision 5 posted to Documents by pchan on 9/30/2022 1:41:34 PM

www.youtube.com/watch

Supplemental Content:

Episode 570 Resources
Web Browser Programming: https://donnersm.github.io/WebSpecElement/flash.html
ESP32 Repository: : https://dl.espressif.com/dl/package_esp32_index.json

Layout	Schematic

Bill of Material:

Product Name	Manufacturer	Quantity	Buy Kit
Resistor	Te Connectivity	4	Buy Now
Capacitor	TDK	1	Buy Now
Switch Tactil	Te Connectivity	1	Buy Now

Additional Parts:

ESP32 DOIT DEVKIT V1.0. You can use other ESP32 but you will have to adjust the wiring accordingly

A breadboard or experimantal PCB to build the circuit on.

element14 presents | About Mark Donners | Project Videos

Tags: esp32, webserver, devkit, spectrum analyzer, DOIT, e14p_MD, Audio Visualizer, iot, arduino, friday_release

Episode 570: Making a WiFi Connected Audio Spectrum Analyzer with ESP32

pchan — Fri, 30 Sep 2022 13:41:34 GMT

Revision 6 posted to Documents by pchan on 9/30/2022 1:41:34 PM

www.youtube.com/watch

Supplemental Content:

Episode 570 Resources
Web Browser Programming: https://donnersm.github.io/WebSpecElement/flash.html
ESP32 Repository: : https://dl.espressif.com/dl/package_esp32_index.json

Layout	Schematic

Bill of Material:

Product Name	Manufacturer	Quantity	Buy Kit
Resistor	Te Connectivity	4	Buy Now
Capacitor	TDK	1	Buy Now
Switch Tactil	Te Connectivity	1	Buy Now

Additional Parts:

ESP32 DOIT DEVKIT V1.0. You can use other ESP32 but you will have to adjust the wiring accordingly

A breadboard or experimantal PCB to build the circuit on.

element14 presents | About Mark Donners | Project Videos

Tags: esp32, webserver, devkit, spectrum analyzer, DOIT, e14p_MD, Audio Visualizer, iot, arduino, friday_release

Episode 570: Making a WiFi Connected Audio Spectrum Analyzer with ESP32

tariq.ahmad — Tue, 20 Sep 2022 19:44:44 GMT

Revision 4 posted to Documents by tariq.ahmad on 9/20/2022 7:44:44 PM

www.youtube.com/watch

Supplemental Content:

Episode 570 Resources
Web Browser Programming: https://donnersm.github.io/WebSpecElement/flash.html
ESP32 Repository: : https://dl.espressif.com/dl/package_esp32_index.json

Layout	Schematic

Bill of Material:

Product Name	Manufacturer	Quantity	Buy Kit
Resistor	Te Connectivity	4	Buy Now
Capacitor	TDK	1	Buy Now
Switch Tactil	Te Connectivity	1	Buy Now

Additional Parts:

ESP32 DOIT DEVKIT V1.0. You can use other ESP32 but you will have to adjust the wiring accordingly

A breadboard or experimantal PCB to build the circuit on.

element14 presents | About Mark Donners | Project Videos

Tags: esp32, webserver, devkit, spectrum analyzer, DOIT, e14p_MD, Audio Visualizer, iot, arduino, friday_release

Episode 570: Making a WiFi Connected Audio Spectrum Analyzer with ESP32

tariq.ahmad — Tue, 20 Sep 2022 18:04:36 GMT

Revision 3 posted to Documents by tariq.ahmad on 9/20/2022 6:04:36 PM

www.youtube.com/watch

Supplemental Content:

Episode 570 Resources

Bill of Material:

Product Name	Manufacturer	Quantity	Buy Kit
Resistor	Te Connectivity	4	Buy Now
Capacitor	TDK	1	Buy Now
Switch Tactil	Te Connectivity	1	Buy Now

Additional Parts:

ESP32 DOIT DEVKIT V1.0. You can use other ESP32 but you will have to adjust the wiring accordingly

A breadboard or experimantal PCB to build the circuit on.

element14 presents | About Mark Donners | Project Videos

Tags: esp32, webserver, devkit, spectrum analyzer, DOIT, e14p_MD, Audio Visualizer, iot, arduino, friday_release

Episode 570: Making a WiFi Connected Audio Spectrum Analyzer with ESP32

tariq.ahmad — Tue, 20 Sep 2022 16:55:42 GMT

Revision 2 posted to Documents by tariq.ahmad on 9/20/2022 4:55:42 PM

www.youtube.com/watch

Imagine you could build your own audio visualizer using Nixie Tubes without having to worry about the hard to find nixie tubes, the high voltage that would involve, and the price you have to pay when you do find a way to purchase them. It’s easier than you think! Using Pixel Leds, you can create your own look-a-like Nixie Tubes that you can use to build a Stereo VU meter. In this video, we are going to show you how to do just that.

Supplemental Content:

Link to GitHub: https://github.com/donnersm/PixieVU
link to my tindiestore to buy the pcb ( optional): https://www.tindie.com/products/markdonners/pcb-tubebar-set/
links related to installing the esp32 board manager ( as mentioned in the video): https://dl.espressif.com/dl/package_esp32_index.json
Episode 564 Resources

Bill of Material:

Product Name	Manufacturer	Quantity	Buy Kit
R13-24B-05-BB Push Button Switch	Multicomp	2	Buy Now
P231-QC20BR10K Potentiometer Linear 10K	TT Electronics	2	Buy Now
MAS70S DIN Audio Connector 7 contacts plug	Hirschmann	2	Buy Now
PS000058 DIN Audio Video Connector 7 Contacts Panel mount	Multicomp	2	Buy Now
PSG08664 Power connector	Pro-signal	1	Buy Now
Power switch	Multicomb	1	Buy Now
Resistor 10K	Multicomp	4	Buy Now
Capacitor 100nF	kyocera	2	Buy Now

Additional Parts:

ESP32 DOIT DEVKIT V1.0. You can use other ESP32 but you will have to adjust the wiring accordingly

2 Glass Test Tubes 150 x 15 mm

PCB: https://www.tindie.com/products/markdonners/pcb-tubebar-set/

PIXELLED Chips WS2812B

Or use ledstrip ( in that case no need for above pcb and pixelleds)

Power supply 5V 1,2A

Piece of plastic Screen MEsh from (fly) screendoor

wood panel 6mm thick ( of different thickness, but you will have to adjust the lasercutter file)

Glue for wood

Optional: Paint in whatever color you like

Glue for plastic/glass ( 2-component glue not super glue)

Wires, any will do, no high currents involved

element14 presents | About Mark Donners | Project Videos

Episode 570: Making a WiFi Connected Audio Spectrum Analyzer with ESP32

tariq.ahmad — Thu, 08 Sep 2022 20:27:13 GMT

Revision 1 posted to Documents by tariq.ahmad on 9/8/2022 8:27:13 PM

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