AWTRIX mini version main control board

Author Github: Click me, click me, click me

Author website: click me click me click me

LED light panel is here

Some purchase links and instructions:

mini MP3 module (chip removed)

Light-diffusion film (A4 specification (210MM*300MM) color classification: LGT075J diffusion film) , you can choose the model you like according to the baby's details.

The acrylic board is customized (black translucent, thickness 4mm) , the dxf file is in the attachment, there are 4 fixing holes and 6 fixing holes.

Screws (4 fixing holes, 2*25 on the left, 2*20 on the right, 2*18 on the right, 6 fixing holes, 2*25 on the left, 2*18 on the right) , the length is calculated and may not be accurate. I used long screws to cut them short.

Small fans and LED light panels will generate heat. In summer, 50% brightness will be around 40 to 50 degrees Celsius. There is a simple temperature control circuit control, which starts when the light panel is fixed at 40 degrees. The adjustable resistor is used to turn off the fan. Pay attention to the selection of the mos tube. Vgs needs to be less than or equal to 0.8V.

LED lamp beads: Xbaosou ws2812-2020. If you find that red and green are displayed in reverse after installation, flash the firmware in the attachment.

Temperature and humidity sensor: It is recommended not to install it. It is affected by the temperature of the LED light panel and the error is thousands of miles away.

Photoresistor: 5528

Small speaker: I can’t buy it anymore. There is a shell file without a speaker hole in the attachment, and the source file is also available in fusion360 format. If you want to install a speaker, just do it yourself.

The chip used to play the prompt tone has USB audio decoding function, so I used this function by the way. The typeC port can be plugged forward and backward to realize USB decoding and serial port switching. USB decoding priority is higher than the serial port control of ESP8266. Since the quality of the chip is very average, I can only listen to it.

As for opening screw holes in the panel, it's a matter of opinion. If you don't like it, just change it yourself. The shell source file is in the attachment.

Due to accuracy issues, the panel with four fixing holes may be curved and convex in the middle after installation. The diffusion film cannot adhere to the grating, and the edges of the middle grid become blurred, reducing the effect.

For panels with four fixing holes, you need to first glue the two internal support pillars on the left to the light panel with glue such as 703.

The original version used touch, but I changed it to buttons. Just pull down IO16 (it seems to be this one, I can’t remember clearly), otherwise the left and right buttons will fail.

To reset the clock, press the reset button and then press and hold the middle button.

You can find tutorials on how to build and set up a server on Baidu yourself. You can use a PC, any pie, or use a TV box, Wanke Cloud, etc. to flash the Linux system .

I am using Zeropi from Friendly House, the shell file is in the attachment. Heat sink link: high-quality heat sink 28.5*28.2*8MM pure aluminum silver chip heat sink power amplifier radiator , construction tutorial: build AWTRIX server at low cost

Some pictures: