# Fifth Lichuang Electronic Design Competition #LCzsx SMD inductance and capacitance meter

Note: * is required.

[Please fill in during the registration stage↓]   1. Self-introduction I am a college student in the Department of Electrical Engineering, and I am about to face a severe beating from the society. I have nearly 4 years of superficial experience in microcontroller development. I have learned about STC, STM32F1/F4/F7, MSP430 and other microcontrollers. Have a little understanding of C language, python, PHP, and web design. Before learning about microcontrollers, I mainly came into contact with analogue electronics, and preferred switching power supplies. After entering college, I began to slowly get in touch with microcontrollers and computer languages. He has participated in various national competitions and has practical experience, such as the National College Student Electronic Design Competition, Internet+, and the National College Student Engineering Training Competition.   2. Briefly introduce the project. This project is to design and produce a simple, economical and practical frequency meter, inductance and capacitance measuring instrument, let’s name it FLC meter. Measurement principle: Measurement using resonance method. Speaking of which, some friends may have guessed what components are in the circuit diagram. But it may surprise you. The core component of this watch is only a main control STC15W408AS microcontroller.

[Please fill in during the competition stage↓] * 1. Describe the project details Features of this watch: Comes with PCB tweezers, measurement gear can be switched between automatic or manual, soft power on and off, ultra-low power consumption, smart charging. Performance: Inductance measurement range is 0.01uH~100mH, capacitance measurement range is 0.01pF~10uF. The measurement accuracy is about 5%. Meet general measurement requirements. Usage: The right button is a multi-function button. Press and hold the right button to turn on and off the machine. After entering the system, use it as a normal button in conjunction with the left button. The original design aims at small size, ultra-low cost, low power consumption and ultra-long standby time. The motherboard size is 23x45x0.8mm, the PCB tweezers length is 98x8x0.8mm, and the finished product size is 25x125x11mm. Weight without casing is 13g. The material cost is about 30. The main control uses STC15W408AS, and the display uses OLED12832 dot matrix screen. The battery uses model 602040, 600mAh lithium battery. The system operating voltage is 3.3v, the switchboard power consumption is about 30mW, and the standby current is 12uA.

* 2. Describe the challenges faced by the project and the problems solved

< br> * 3. Describe the key points involved in the hardware and software parts of the project

< br>   4. Project material list display   5. Project picture upload 5.1. Print the competition logo picture on the PCB, if not, it will be deemed as giving up the competition           5.2. Other pictures of the project * 6. Demonstrate your project and record it as a video for upload 6.1. Video upload Competition official website 6.2, B station video title and link

< span class="colour" style="color:rgb(170, 170, 170)">< span class="size" style="font-size:12px">Notes: ①: Video requirements: Please horizontal screen Shoot, the resolution is no less than 1280×720, the format is Mp4/Mov, the size of a single video is limited to 100M; ②: Video upload: please upload to the official website of the competition and B station ( www.bilibili.com ) simultaneously, B station’s top 10 most popular projects You will receive a cash reward of 1,000-5,000 yuan, and other uploaded projects will receive a 100-yuan Lichuang Mall no-threshold coupon; ③: Video title: The 5th Lichuang Electronic Design Competition: {Project Name}-{Video Module Name}; such as the fifth 2018 Lichuang Electronic Design Competition: "Autonomous Driving" Project - Team Introduction. < /span>< /span>< br> < br>   7. Whether it is published to the public for the first time 7.1. Whether the project has been published or won awards before, please indicate that this project is published for the first time and has not been published or won awards. 7.2. If the project is optimized on the original basis, please explain the optimization part. The measurement principle of this project adopts the resonance method. Although there are similar products, we only use its measurement principle for reference. This project is not optimized based on the original one.   8. Open source documents* 9. References

Click the link for more details: https://www.szlcsc.com/go/dsxq