My Drops

# My little cat

all project files: link: https://pan.baidu.com/s/1hmqIEu-WVYtb0CCT-mbcRw?pwd=bn07 Extraction code: bn07
My little cat project files: link: https://pan.baidu.com/s/10vKm_aJXs5-gfyshYEcoRg?pwd=spru Extraction code: spru --Shared from Baidu Netdisk Super Member V8

A simple clock and temperature display.

![IMG_20220818_210816.jpg]

The current board has another tail: https://oshwhub.com/TXdodo/an-di-xiao-miao-wei-baThere
 
is another version: https://oshwhub.com/TXdodo/5-17quan-cai-dian-zhen-ws2812
 
# Start teaching you how to solder.

Prepare the necessary materials and find a suitable workbench.
![IMG_20220815_200351.jpg]
First, use a solder paste syringe to apply solder paste to the good plate of the lamp.
![IMG_20220815_201323.jpg]
Then stick the ws2812-5050 lamp beads. I used tweezers to stick them one by one.
![IMG_20220815_203414.jpg]
Then heat and weld. I use a heating plate here. The temperature is just right. When the temperature rises, the solder will melt and the lamp beads will be welded. Try to use low-temperature solder without toxic smoke. At the same time, pay attention to scalding and safe use of electricity. At this time, you can also check whether the welding is neat and make appropriate adjustments.
![IMG_20220815_203719.jpg]
After welding, the lamp beads are neat and clean.
![IMG_20220815_204012.jpg]
Take out the solder wire and the electric soldering iron, and then apply a lump of solder on the claw to make it look full. The appearance of the claws welded by different solders is also different. Try to use lead-free solder
![IMG_20220815_204337.jpg]
Next, we will solder the components of the bottom board. We need to use the electric soldering iron for hand soldering. First, we need to find a good position to burn the solder beads. I have the solder wire in my left hand and the electric soldering iron in my right hand.
![IMG_20220815_205625.jpg]
First solder the smaller components,
![IMG_20220815_212056.jpg]
Then solder the larger components,
![IMG_20220817_204256.jpg]
Then use a hot hair dryer to solder the sensor chip,
![IMG_20220817_204958.jpg]
Prepare the pin header and the mother header to connect the tail,
![IMG_20220817_205337.jpg]
Then solder the tail, and solder the mother and pin header like I did. The tail components are soldered in advance,
![IMG_20220817_205800.jpg]
Plug the tail in the direction, and my little cat is done soldering
![IMG_20220817_210114.jpg]
Finally, solder the battery. The battery must be greater than 3.7 volts, otherwise the computer cannot connect,
![IMG_20220817_211532.jpg]
# Next, upload the code