Electronic Pet Xiaodai

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.