aapicella

Good question. We know the height and the radius of the cone. The angle would be equal to the acos of radius/hypotenuse. So then we could pick a random x (0 to radius) and go straight up to the Z value by similar method we did before. the only way i found to get the random angle was to rotate the base on the y axis a random (1-360) degrees after I determine the points for x and z

It is very fun programming Arduinos. I am glad you enjoyed it.

I am totally guessing but there are two things I would look at. 1) that the processors speed is set correctly for your ESP32 module and that your libraries are all updated. The video above is what you would expect the speed to be. One easy way to test the CPU speed is to set an led to blink for 1 second and delay for 1 second( Blink.ino). i found on some of my Attiny they would either be very slow or very fast if i messed up the cpu speed. To test the library run an example and make sure it scrolls smoothly.I really hope that helps.

Hi, to get the arduino software you to here: https://www.arduino.cc/you can get the code from this link. https://github.com/aapicella/wordClock/blob/master/Word_Clock_LED_NTP_final_.inoonce you install the arduino software follow the directions in the above instructable and load the code from the github link. You may also just cut and paste the link from the github site into the arduino software.

They look awesome.

Thanks I appreciate the comment. Please remember to vote on the contest

Thanks I appreciate the comment. Please remember to vote on the contest

I like your projects as well.

I was thinking about posting how to hook up the nema17 stepper motors to an arduino based GRBL.

Thanks

Thanks much, don't forget to vote and click favorite :)

7 is in list a,b and c. My first version I typo'ed it. If you don't see it there try refreshing your brower. Thanks,

Thanks much, please vote if you liked it.

I thought about what you asked. Since you can't rely on the ESP32 to be always powered on and connected. What I would do is have your local web server create a counter in an html doc (php/cgi), then have the esp32 get that file and post the counter to the leds. You could also look at doing an API call to the web server to retrieve that value. seems like a fun project please keep me posted.

I googled the message and it seems the code may not work on the new version of the library. If I have time I will rebuild it with a more recent version.

Glad you liked it.

This build had a slight delay while the form was getting the data and it was parsed into an array fof bits. The delay was maybe half a second:https://www.instructables.com/ESP8266-To-LED-Matrix-Look-Ma-No-Arduino/The end of the instructable I have a loop that will keep checking the web form but scroll the text too. That is the limit of that processor.

I added a video. The time in the video is 7:27-7:28. I did it over the minute change so you could see the minute hand move. The hour hand moves 5 LEDs at a time, and the minute hand and second moves one LED at a time.

I added a video. The time in the video is 7:27-7:28. I did it over the minute change so you could see the minute hand move. The hour hand moves 5 LEDs at a time, and the minute hand and second moves one LED at a time.

basically you want to rotate the font bits so instead of taking colums you take rows.I would think you could accomplish that in drawSprite function by swapping x and y. If I get some time this week I will test it.

Awesome thanks so much.

I like the instructable and was going to try it but the link to the source code took me to another blog but no source code. Could you make the source available It looks like you are very successful with this bot.

In the code you would change the linesconst int LEDMATRIX_WIDTH = 31; const int LEDMATRIX_HEIGHT = 7;const int LEDMATRIX_SEGMENTS = 4;to (assuming straight line) const int LEDMATRIX_WIDTH = 63; const int LEDMATRIX_HEIGHT = 7;const int LEDMATRIX_SEGMENTS = 8;I hope that helps, Good luck.

Currently I set it to 52 characters. Can modify the HTML in the arduino script.if you search for maxlenght='52' you may change that. I hope that answers your question.

http://www.esp8266.com/wiki/doku.php?id=esp8266-de...the esp8266 site called out the typos on the dev board labels. That's what caused the confusion.

I updated the doc, but this board has RX/TX mislabeled so it looks like rx/rx when its really rx/tx

I should explain that. The development board has them reversed. Apparently they were mislabeled. I didn't find that out until I read an article after this post. You are absolutely correct that is should be Rx-> Tx and Tx-> Rx.

I went ahead and rebuilt it as you said. I think there is value in using this build because it limits the complexity of the ESP8266 programming. you can just serial print when you want to display something. Here is the ESP8266 Only version: www.instructables.com/ESP8266-To-LED-Matrix-Look-Ma-No-Arduino/

I took your advice and built this out without the Arduino. This build does have its advantages in lowering the complexity of the ESP8266 programming. Just Serial print and see the results. I put an Instructable up for the ESP8266 without the Arduino here: https://www.instructables.com/ESP8266-To-LED-Matrix-Look-Ma-No-Arduino

Fixed the typo thanks.

No but i will. The datasheet said the min was 3.5 so it may work.

The LED matrix I have runs on 5v. When given 3.3v it stops working properly. The letters scroll through the first part then the display starts flickering. There are 256 leds so maybe once a certain number are lit it stops working properly. In any case the MAX7219 is rated for 5v and there is a different low voltage chip available called MAX6951 which sparkfun recommends for low voltage projects. I will rebuild this project without the arduino to verify.

That sounds like a good idea to me.