Bandpass filter (300-3kHz) based on LM358

ca9eb02462fb42efe1091242c69771ed.mp4

PDF_Outdoor Multi-Port USB Extender.zip

Altium Outdoor Multi-Port USB Extender.zip

PADS Outdoor Multi-Port USB Extender.zip

BOM_Outdoor Multi-Port USB Extender.xlsx

94278

Electronic Pet Xiaodai

This mini electronic desktop pet, based on the STM32C8T6, features two control methods: Bluetooth remote control and voice recognition. It offers three output formats: body movements, facial expressions, and sound, and includes a built-in happiness and stamina calculation and reporting system. It also comes with a detachable ultrasonic obstacle avoidance module and an infrared cliff detection module.

Physical parameters: Body width approximately 7cm, length approximately 10cm (11.2cm including ultrasound), height approximately 9cm when standing upright, and approximately 6cm when lying down. This product has passed a drop test (actually, it was an accident), and dropping it from a 1m high table will not affect the pet's appearance or function.
It has a main power switch, is battery powered, and integrates charging and discharging.
Regarding the PCB design: Except for the main power switch, which is fixedly soldered, all other modules are directly plugged in via female or male headers. Areas for improvement:
1. The charging and discharging module used in this design does not have a boost function, but in practice, it has little impact on use, only affecting voice recognition wake-up when the voltage is low.
2. The four servos and the voice recognition module are connected to the same 5V power supply. When the servos operate continuously and significantly, it will affect the use of voice recognition.
For a detailed introduction, please refer to the video "[After 80 Days, We Made Our Own Electronic Pet]" https://www.bilibili.com/video/BV1kZ421p7S5/?share_source=copy_web&vd_source=c3e2fc68aa51e67bd3f2be57434d3d1c and the article on Bilibili.

misgon_cyberdog project code.zip

cyberdog-LD3320 speech recognition module project code.zip

Electronic Pet Xiaodai's Body.STL

Electronic Pet Little Dumblegs.STL

ourdog.aia

ourdog.apk

cyberdog electronic components materials.docx

PDF_Electronic Pet Xiaodai.zip

Altium_Electronic Pet Xiaodai.zip

PADS_Electronic Pet Xiaodai.zip

BOM_Electronic Pet Xiaodai.xlsx

94279

PD100W IP5389BZ A3 version

PD100W multi-protocol fast charging module, power bank

This is my first time designing a PCB for a small PD 100W multi-protocol power bank . Please provide feedback.
There are three PCB designs to suit different needs and assembly methods; you can choose whichever suits your needs. The circuitry is based on open-source solutions from the open-source forum, with some modifications. You can search for open-source solutions there. Commercial use is prohibited! The front panel is not designed; you will need to design and update it yourself. The connector is incompatible with the physical product. Surge protection circuitry has been added, and the LDO model has been changed to 5.27 for circuit optimization. It has been updated to 6.12. This is my first time designing a PCB, so please provide guidance if needed.


 
 

PDF_PD100W IP5389BZ A3 version.zip

Altium_PD100W IP5389BZ A3 version.zip

PADS_PD100W IP5389BZ A3 version.zip

BOM_PD100W IP5389BZ A3 version.xlsx

94280

electronic