newrudeman

#The7thLiChuangElectricityContest#Standard USB power meter

Overview

The design idea is based on the LiChuang summer training camp case: National N32G430C8L7 standard USB power meter engineering
MCU: N32G430C8L7 48P. The

external crystal oscillator was removed from the original design idea, and CH340C was added so that the voltage, current and power data can be directly obtained through USB, which is convenient for data collection.
Refer to the SW pin header of C8T6. The SW/UART of this design uses an inward bend plug, which is hidden just below the 0.91OLED, which is convenient for printing the aesthetics of the shell.

The main functions are
1. Load voltage/current/power acquisition and calculation
2. OLED displays the voltage/current/power of the load
3. Serial port transmission of the voltage/current/power of the load

. CH340C and IN199A have not been welded yet, and will be done in the next two days.

2022/9/7: CH340C and INA199 have been welded, and current sampling has been realized. The homework will be handed in first. There are too many courses for the camp, and the serial port function will be developed on the weekend, and the code has not been updated yet.

Design Files

Related Devices

Devices	Class	introduce	Datasheet
N32G430C8L7			Download
0805F475M500NT	Passive components;The patch capacitance	Accuracy: ±20% Capacitance: 4.7uF Rated voltage: 50V Temperature drift coefficient (dielectric material): Y5V. Material: Y5V	Download
YJ-USB-AF-SMT-01	The connector;The USB connector	Male and Female: Female Connector Type: USB - Type A Number of Contacts: 4 Standard: USB 2 High Temperature Resistant	Download
AMS1117-3.3	Power/power management;Low dropout linear regulator (they)	Output type: Fixed Maximum input voltage: 18V Output current: 1A Output voltage (minimum/fixed): 3.235V	Download
USB公头插座	The connector;The USB connector	Male and Female: Male Connector Type: USB - Type A Number of Contacts: 4 Standard: USB 2 Not High Temperature Resistant	Download
INA199A1DCKR		SP Amp Current Sense Amp Single 26V 6-Pin SC-70 T/R	Download
FN21N120J500PAG			Download
2.54-1*4P母			Download
PZ254R-11-03P		Pitch: 2.54mm Total number of PINs: 3 Number of rows: 1 Installation type: Bend contact material: Brass Color: Black	Download
RTT054700FTP	Passive components;SMD resistor	Resistance (Ohm): 470 Accuracy: ±1% Power: 1/8W Temperature Coefficient: ±100ppm/°C	Download
PZ254R-11-06P		Pitch: 2.54mm Total number of PINs: 6 Number of rows: 1 Installation type: Bend contact material: Brass Color: Black	Download

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Update:2024-11-22 18:58:38

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