In the software "Fritzing" I made a connection diagram of the elements on the board.
You can download the source file of this scheme from my repository on GitHub
(ссылка).
To solder all the elements on the breadboard, you need a regular electric soldering iron and one of the flux varieties (ordinary rosin is also suitable) to remove the oxide film during the soldering process, reduce surface tension and improve the spreading of liquid solder.
For more convenient soldering, I made a special "tubular" tip from the tip already available on the soldering iron (900M series), according to the following video instructions (link). All elements are on our table and we are ready for further assembly.
The result is such a compact printed circuit board with pre-prepared elements installed on it.
The blue pins at the top of the board is for two Data lines connected to the LED strip (in this assembly option, is used parallel multi-segment mode) and 5 V connections from the power supply to level shifter. The blue pins located on the left side of the board is for connecting to the Raspberry Pi (SPI bridge).
| Esp32 | - | Raspberry |
|---|---|---|
| GND | GND | GND |
| GPIO 18 | SCK | GPIO 11 |
| GPIO 23 | MOSI | GPIO 10 |
| GPIO 5 | CE0 | GPIO 8 |
This completes this stage of preparing the LED driver.