this was very entertaining (and meaningfully informative). thank you!

salt not sugar, also .. yo unto patient enough you need concentrated solution a deep green color your one is pale. also put electrodes closer together also it help to do it in warm place where the solution starts at 30°C this will help to speed up the reaction, and you need more salt than a pinch . also the copper you need to polish to mirror finish and then clean any contamination, it is posible you contaminated the solution with lead and tin form those resistors as well. you should have concoated them or do this on bare board with no contaminates. also the solution needs to be stirred as forming bubbles will cause pit and groves to appear so you need the item to contently shake - to shake the bubbles off.

Thank you for the very informative video. I have a problem with a software I'm developing: I read an Audio file from SD and play it via i2s. The reading is 3072 bytes at a time. It happens every now and then that the reading takes 500/600 ms instead of the 15ms it normally does. This behavior is not periodic but random. This ruins the audio streaming. Have you ever encountered this problem? I use esp32s3

when they can do two-layer boards with vias easily, then I'll be impressed 😅

1:10 yah, thats why I searched for a video tutorial for how to do it. Like say... THIS ONE

Any chance you could explain how to use the plugin? I'm not sure why its not working for me, or if I set it up right.

Anyway, each voltage measure on a white Led will give 3V (approx), this is due to the Zener effect of Leds. Red is 1.4V, green 1.8V etc. What matters is the current, a 1W white Led needs 350mA. This is why you cannot dim a Led simply by changing the voltage, it doesn't work.

Cool! What's the minimum clearance between these traces?

How much cost ?

What maximum range did you get wh3n t3sting?

i am working on it and confused, on jupyter notebook there's an error message "module not found Error: no module named 'tensorflow' even i after I ve installed tensorflw

Do you need an wifi network in the middle between the ESP32 and the windows machine? Or is the ESP32 setup as a standalone access point?

Really interesting video! When I do a recursive clone, I get a warning that the github host cannot be authenticated. How do I solve this issue?

Can we use LM386 or PAM8403 Audio Amplifier instead of MAX98357A?

This isn't all that impressive considering the ESP32 runs at 240MHz. Someone accomplished this 13 years ago using a 32MHz AtXmega256 8-bit CPU core. If I remember correctly he used DMA to read and push a specially prepared video file to the LCD. The title of that video on UKposts is "DMA_Access.mp4.", but not much info about it, h I personally played a video on an STM32F429ZIT Discovery board back in 2014 when I just got it, which is already 10 years ago. Time really flies! 😮😁 And during my search for more info about ATxmega video info, I found on Hackaday from 2012, the classic Atmega 15fps video playback: "PLAYING VIDEO ON AN 8-BIT MICROCONTROLLER" And title of the related video on UKposts: "8 BIT AVR VIDEO PLAYER"

My SD Card works and is marked HC, I think memories larger than 16 GB fail

I like for any crazy idea I have, like I have an old Ipad, I have a raspbery pi, can I combine them? there is always someone out there who did it already.

Put these on my rim

Hello. The project is built in VC and Platformio, but shows an error: "Ignore unknown configuration option `c_build_flags` in section [env:esp32doit-devkit-v1]" There is probably a problem with the line "[env:esp32doit-devkit-v1]" in the platformio.ini file. After the firmware is installed, information is displayed in the terminal that ends with the lines: E (3306) SPIFFS: mount failed, -10025 E (3306) main: Failed to mount or format filesystem As far as I understand, the file system is not initialized and files cannot be loaded. I still don’t know ESP32 very well, please help. I use ESP32 WROVER with PSRAM.

Is it posible to reproduce UKposts online on esp32 without server?

Work of art! was thinking if you started with four strands of ribbon cable and soldered those to the naked USB micro pins while everything was straight and aligned then you could route those wires easily without needing the additional break out board. 20/20 hindsight and all.

Great. I'm waiting on some ESPs for some wireless speakers. This should help

LEDs (actually any diode) in parallel is not the best idea because there are no 2 identical ones. So each one will light differently. Rather 1 resistor for each LED. That is me thinking loudly ;-)

Than you for the great video! I was wondering about pin 29 the VDD_SPI. I currently have it set to +3.3V but I have seen some boards that don't have it connected to anything and some that have 2 decoupling capacitors and just label it VDD_SPI. So maybe this is an output?

Why most ESP32 modules contain a usb-serial chip if it was not required?

Love the light effects! ✨

Love your shiny balls, thanks for letting the world see them 😂

The Disc: "I'm going to make you regret not holding me down with stronger tape!"

Nice! But… Can you implement a couple of small motors so the globes rotate too? ;)

On the power circuit, can't D9 be omitted?

Chris - is there a way I can make this work with an existing LED light without creating a circuit board? It's a USB light similar to the one under the crystal balls. I'd like to control the light with the voice reactive software but making a PCVB is well beyond my skills. I could however solder in some wires and an esp32.

A stone effect filiment could look nice, or have a look at the chrome effect powder used for fingernails. Do you have a resin 3D printer? They don't have to be as messy as some make out, and cleaning prints can be as easy as a wipe with a paper towel. Prints look so much better, and are ideal for small shallow objects. You can print multiple objects without increasing print time, just as long as you can fit them on a small build plate. Also using solid infill doesn't increase print time.

always avoid mouting components on the antenna area

Looks like it was a really fun thing to do

The nickle plated one has a weird stoney look to it, which makes me think a concrete molded one might look cool :D

Two questions: Can you order a small pcb with a esp32 module already soldered on? Also, where can I purhcase a bare esp32 module? All I can seem to find are dev kits.

Nicely done! I like your explanation of the circuit design.

I like your balls!

You could do source switching by using 2 diodes - one on each input. This way your regulator is powered by the highest voltage source. You would drop a little on the battery diode but this would be minor with a Schottky diode. It is possible you would lose a bit of headroom on the regulator as the battery discharges but the simplicity might win out.

What you need to do now is create a two channel laser so that you can take clear balls and put your own pictures inside. Now that would be fun project, two CO2 lasers should do a nice job on glass balls.

This video is just balls!

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Look Mr silicon I have no wish nor desire to see you ball's shiny or otherwise. That said now I can sit down and watch the rest of the video with a smile in my face.

Looks like you bought the $150 galvo parts to do this. I am reminded of all the people posting videos on diy liquid nitrogen that did a) buy a cryo cooler b) hook up power supply.

terrible speech. get a speaking course. also learn how to use pauses.

🤣🤣

is it plausible for a ESP32 to operate on wifi with audio streamed (I2S) and control a neopixel strip simultaneously