【RA】Touch light bar based on Renesas RA2E1 microprocessor controller expansion

BOM download

PCB_Touch light strip board.Pcb_2022-09-24.pdf

PCB_Touch light strip board.Pcb_2022-09-24.json

Schematic_[RA] Touch light strip based on Renesas RA2E1 microprocessor controller expansion_2022-09-24.pdf

SCH_[RA] Touch light strip based on Renesas RA2E1 microprocessor controller expansion_2022-09-24.json

Light strip control panel.Sch_2022-09-24.schdoc

Touch light strip board.Pcb_2022-09-24.pcbdoc

Gerber_Touch light strip board.Pcb.zip

61309

Bluetooth power amplifier audio based on NS4251AB/D class power amplifier chip expansion

Introduction: Bluetooth amplifier audio based on NS4251AB/D class amplifier chip expansion

Battery management part:
       A multi-functional power management SOC using IP5306 voltage-to-voltage conversion, lithium battery charging management, and battery power indication. The conversion efficiency is as high as 92%. It can be expanded according to the simplified application provided in the data sheet. It can be powered by common Micro-B female sockets and type interfaces, or it can be powered by lithium batteries, making it easy to carry. The battery input range is 3.7V-4.2V.
-------------------------------------------------- -------------------------------------------------- ----------------------------------------
      Update log: 2022/6/29, add dialing code The switch seat, battery rest base, and Bluetooth part seat can be facing inward, and you can see the LED covered by Bluetooth.
-------------------------------------------------- -------------------------------------------------- -----------------------------------------------
 
Bluetooth module and audio input part:
   using MH-M18 Bluetooth The module supports the latest Bluetooth 4.2 transmission and two-channel stereo lossless playback. After the module is connected to Bluetooth, Bluetooth wireless transmission can be quickly realized, which is very convenient. In an open environment, the Bluetooth connection distance can reach 20 meters. 
Bluetooth V4.2 version, supports Bluetooth automatic reconnection technology, supports WAV/WMA/FLAC/APE/MP3 lossless decoding, and stereo two-channel output.
After the module is powered on, the mobile phone searches for the Bluetooth name MH-M18/MH-M28/MH-M38, and music can be played after connecting to Bluetooth;
module blue indicator light:
when Bluetooth is not connected, the indicator light flashes quickly;
Bluetooth is connected When Bluetooth is playing, the indicator light is always on;
when Bluetooth is playing, the indicator light flashes slowly.
Pin diagram:
Main control part:
       Add a few capacitors to the audio input and Bluetooth input to filter interference to make the sound quality cleaner.
What you need to pay attention to are the several working modes of the main control chip:
Status indicator light part:
       You can switch the working mode by referring to the data manual, and read the data manual carefully.
 

Demo video.mp4

IP5306.pdf

NS4251 data sheet.pdf

PCB_PCB_I love speakers_2022-09-24.pdf

PCB_PCB_I love speakers_2022-09-24.json

PCB_I love speakers_2022-09-24.pcbdoc

Gerber_PCB_I love speakers.zip

Schematic_Bluetooth power amplifier audio based on NS4251AB_Class D power amplifier chip expansion_2022-09-24.pdf

SCH_Bluetooth power amplifier sound based on NS4251AB Class D power amplifier chip expansion_2022-09-24.json

I love speakers.SCH_2022-09-24.schdoc

61310

Offline voice night light

Introduction: Offline voice night light based on Qiyingtailun C1122 main control design

Original link: https://oshwhub.com/course-examples/zhi-neng-jia-ju-zhi-nengai-yu-yin-xiao-ye-deng
      Schematic diagram:
       using typeC5V DC input for the module and four-way RGB The lantern is powered by the AMS11175 voltage regulator chip that converts to 3.3V stable DC output. 22uf and 10uf chip capacitors are added to both ends for filtering to ensure the stability of the medium input power supply. When choosing a model, it is recommended to choose a horizontal interface. Because the wrong model was selected, I did not pay attention to welding it when I bought it and later found that the interface was standing upright, which was inconvenient for power input.
      The module uses Qiyingtailun C1122 as the main control. The module has its own LDO output of 3.3V. One end of the resistor R3 is connected to the ninth pin, and one end is connected to the 3.3V pull-up generated by itself to enter the download mode. RXD and TXD are serial port downloads. , the four RBGs are driven by NPN type transistors. When the module outputs a high level, the transistors are turned on. By controlling the duty cycle and time of the PWM, the effect of colored lights can be modulated. The output speaker is 4W3Ω, which can be purchased on Taobao. Plus four copper post holes for easy fixing.
     PCB:
     The layout places the four RBGs at the four corners, the microphone in the center, and the speaker interface on the right.
     Power supply part: In order to ensure the circulation of the power supply and the return of the ground, the power line should be more than 20 mils, and the GND should be connected with copper. The placement of vias will help the heat dissipation of the power supply and the return of the ground. Pay attention to the bottom of the module when laying copper. Do not lay copper to prevent signal interference. Logos and pictures added by yourself.
     For the code and software debugging part, please refer to the original link. Upload the above to the attachment.
 

Demo video.mp4

BOM_PCB_Offline Night Light_2022-03-20.csv

[Lichuang Classroom] Intelligent AI offline voice night light.pdf

Qiyingtailun-offline speech recognition chip-AI voice pet lamp development.pdf

Qiyingtailun-offline speech recognition chip-GPIO.pdf

Qiyingtailun-offline speech recognition chip-PWM.pdf

Qiyingtailun-offline speech recognition chip-serial protocol and LOG printing.pdf

BOM download

PCB_PCB_Offline Night Light_2022-09-24.pdf

PCB_PCB_Offline Night Light_2022-09-24.json

PCB_offline night light_2022-09-24.pcbdoc

Gerber_PCB_offline night light.zip

Schematic_Offline Voice Night Light_2022-09-24.pdf

SCH_Offline Voice Night Light_2022-09-24.json

Night light schematic diagram.SCH_2022-09-24.schdoc

61311

[Internet of Things] Hongmeng Smart WiFi Switch 985502A

Introduction: The wifi module developed based on HiSilicon HI3861 chip realizes the need to turn off the lights manually in the dormitory

Overall design block diagram
![image.png] 

## Schematic design description

![image.png] Power supply The module uses the AMs117 voltage stabilizing module to provide a stable output voltage for the module. Due to the wrong model selection of the interface, the charging direction is vertical.

## PCB design description

![image.png]
## Software description

code attachment has been uploaded

## Physical display description

demonstration video has been uploaded

## logo verification

![image.png]