Tool Man's Cat

2020.07.18 -------------------------------------------------- ----------------------------------------//Gorgeous segmentation Thread I have always wanted to make a pendant to give to a friend, but I am such a procrastinator. . . . . Into the title:

Project Controller: It is planned to use Corecon’s little bee (EFM8SB10F8G-8bit-8k) because it is petite (3*3mm qfn package), can see and touch (with capacitive touch), sleeps and is light (low power consumption). She is so popular that it would be unreasonable not to check out her brand today.

Power supply part: Monocrystalline silicon solar energy is used here. Due to the limited size, there are not many options to choose from. Here are three examples: Option 1: Direct charging with a string of BPW34 (silicon photovoltaic cells); Option 2: Low-voltage solar energy The battery is boosted by TPS61220 to charge the lithium battery; Option 3: Use TI's specialized energy harvesting chip BQ25504. Each of the above three solutions has its advantages and disadvantages. Which one should be integrated? . . . . Of course, all are accepted, and only the children make the choice!

Lamp bead selection: It seems that there is no choice except the single-bus WS2812.

Key points: strange shapes, strange totems, strange names. And my name is "weird".

Finally: happiness is the most important thing!

Please forgive me for my antique computer’s blue screen from time to time + the inability to upload files (I’m exhausted mentally and physically). To be continued. . . . The design process is as follows: The design process of Lichuang eda has been organized to Station B: https://www.bilibili.com/video/BV1Si4y137MG/ The welding and debugging process has also been uploaded to Station B: https://www.bilibili. com/video/BV1Za4y1E7J7/ Cut a battery piece and cover the pot: https://www.bilibili.com/video/BV1Tp4y1i76Y 2020.08.16----------------- -------------------------------------------------- --------------------//Gorgeous dividing line. First, the picture of the first-generation cat: The above is a sharing of all the information and production process of the first-generation cat. The interactions and colors are a bit monotonous. (It’s too monotonous). The following is a brief summary and a list of follow-up plans: Hardware: The first-generation version integrated three solar charging circuits, and after testing, the last one (that is, the BQ25504 solution, don’t ask why, just because it is professional). (1) Optimization will be carried out in the later stage (unnecessary devices will be cut off), and theoretically the sleep current can be reduced to less than 2ua; (2) A TF card socket is planned to be introduced to facilitate disassembly and assembly; Firmware: A touch ring is integrated on the front, but it is advanced The touch function needs to be debugged again. Finally, here is a close-up of the first-generation cat: