#The7thLiChuangElectricityContest#USBPowerMeter

* 1. Project function introduction
Real-time acquisition of voltage and current of USB line, and calculation of power consumption.
The detection voltage range is the voltage range of the adopted AMS1117, and the current upper limit is 2A.
 
* 2. Project attributes
This project is an original project made public for the first time
 
Note: Please indicate whether the project is made public for the first time; whether the project is original; whether the project has won awards in other competitions, if so, please describe the details of the awards; whether the project has participated in the defense at school.
 
* 3. Open source agreement
The open source agreement is GPL3.0
Note: Altruism is self-interest, please read the following content carefully.
Embrace open source and give unlimited value to the project. It is recommended that more than 80% of the core functions of the project be open source;
if a part of the function is irreplaceable and the project cannot solve the corresponding problem after deleting it, then the function implemented by this part is the core function of the project; for example, if an electronic load is designed and a host computer software is designed to monitor power changes, the electronic load is the core function and the host computer software is an auxiliary function; for example, an isolated 485 module is used in the electronic load to communicate with the host computer, then the communication function implemented by this 485 module is an auxiliary function;
the project should choose an open source protocol that suits it. If the project references other open source projects, the source should be indicated and the original author's open source protocol should be followed; the original project is recommended to use the GPL3.0 open source protocol;
the functions directly referenced from the original circuit or original code of the open source project cannot be used as the core functions of your own project, and the functions directly implemented using the general modules on the market cannot be used as the core functions of your own project.
 
*4. The hardware part
is designed by Jiali Chuang EDA.
The main control adopts the national technology N32G430C8L7. The N32G430 series adopts the 32-bit ARM Cortex-M4F core, with a maximum operating frequency of 128MHz, supports floating-point operations and DSP instructions, integrates up to 64KB embedded encrypted Flash, 16KB SRAM, integrates rich high-performance analog devices, built-in 1 12bit 4.7Msps ADC, 3 high-speed comparators, and integrates multiple U(S)ART, I2C, SPI, CAN and other digital communication interfaces. USB to ttl burning is adopted, and the wiring method is R to R and T to T when in use. The power supply interface is reserved, and the power supply sampling ams1117 can be directly used to convert the voltage to 3.3v
using the burner +3.3v power supply. The current detection uses INA180A2IDBVR with a 100 milliohm sampling resistor to achieve low-side current detection, with a gain of 50v/v. The voltage detection uses 91k and 10k voltage division *5. The voltage has been calibrated in the software program, but the current has not been calibrated due to lack of equipment. The program can directly use the attachment. If the national technology download tool is used for burning, it must be 1.2.5 and above. Program and download tool download link: Attachment *6. The original parts in the BOM list can be purchased in the LiChuang Mall. The USB connector may be out of stock. It is recommended to purchase resistors with higher precision for R2 and R3. The screen can be purchased on other e-commerce platforms. ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price 1 10uf C2 C0603 1 2 100nf C7,C8,C9,C10 C0603 4 3 4.7uf C11 C0603 1 4 1uf C12 C0603 1 5 0.1uf C13 C0603 1 6 USB-CONN-AM90 CN1 USB-A-TH_AM90 1 USB-AM90 ValuePro LCSC C9739 0.4789 7 HDR-F-2.54_1x4 H1 HDR-F-2.54_1X4 1 LCSC C225501 0.5575 8 0Ω L2 L0603 1 CBG160808U000T FH LCSC C43163 0.0195 9 0.01Ω R1 R2512 1 LR2512DS-3W-10mR-1% Milliohm LCSC C500740 0.6356 10 91k R2 R0603 1 11 10k R3,R6,R7 R0603 3 12 N32G430C8L7 U1 ​​LQFP-48_L7.0-W7.0-P0.50-LS9.0-BL 1 N32G430C8L7 Nations(國家技術) LCSC
























 
 
 
 
 





 
 
 
 
 





 
 
 
 
 





 
 
 
 
 





 
 
 
 
 















 
 




























 
 
 
 
 





 
 
 
 
 








C3032170
5
13
INA180A2IDBVR
U2
SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR
1
INA180A2IDBVR
Texas Instruments
LCSC
C192764
1.6354
14
HDR-M-2.54_1x4
J1
HDR-M-2.54_1X4
1
 
 
LCSC
C124378
0.2484
15
U-A-24DS-W-1
USB1
USB-A-SMD_U-A-24DS-W-1.
1
U-A-24DS-W-1
Korean Hroparts Elec
LCSC
C530628
0.553
16
10uF
C3
CAP-SMD_L3.5-W2.8 -FD
1
CA45A-B-20V-10UF-K
CEC(Zhenhua Xinyun)
LCSC
C2976904
0.7275
17
10uf
C4
C0805
1
 
 
 
 
 
18
K2-1107ST-A4SW-06
RST,BOOT
KEY-SMD_L6.2-W3.6-LS8.0
2
K2 -1107ST-A4SW-06
Rectangular Connectors - Contacts
LCSC
C118141
0.4331
19
SC1117-3.3V
U4
SOT-223_L6.5-W3.5-P2.30-LS7.0-BR
1
SC1117-3.3V
FM
LCSC
C173386
0.4014
*7, Competition LOGO verification
 
* 8. Demonstrate your project and record it into a video and upload
it. See above
 
for more details: https://diy.szlcsc.com/posts/d76d9cb41705430e9a54e7a5feed07a5