Learn Arduino?

vk3vsm

New member
I have an ESP32 sitting here on the bench , have been trying to work out for a while what to do with it
 

VK3ZYZ

Moderator
Staff member
I have been playing with this led matrix code uploads fine but this is all I get any ideas??
Are you using the specified pins? It does make use of the SPI hardware I believe.
Looking at the picture, I'm unsure of your power connections.
The LED panels I have run on 5V only and it does look like you have maybe 12V connected as the Arduino barrel jack power seems to be the same as the panels. And the Arduino barrel jack needs to be at least 7V, not 5V.
Your Arduino will run ok on the laptop USB power but the LED panels will not.
Can you please clear up the connections?
 
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VK3ZYZ

Moderator
Staff member
For the next meeting 4th Nov. I will have a play with addressable LEDs.
They come in different packages. This is an example.
1698913669487.png

As is this...
1698913740522.png


Here are some libraries to add if you do not have them already.

See the postings about Josh's 5x8 matrix too.
 

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VK3ZYZ

Moderator
Staff member
These may be a good board to play with.
1699218293175.png

Aliexpress price $13 +$8 postage.

Have a look at this video. The guy in it has put a lot of work into getting a community going and has produced docs and code examples for this board. He does make a comment that there are other similar boards around so if you get one, check it is the correct one to suit the info.


I think it could be a very fun board to play with. Maybe even run a radio synthesizer?
 

VK3ZYZ

Moderator
Staff member
One of the useful devices to use in an Arduino installation is a rotary encoder. You will se them in almost all my VFO designs for instance.
Here is a pretty good video explaining a couple of versions.

 
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