#第七届立创电赛#USB电流测量 - 立创电子设计大赛

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<h2>国民技术N32单片机</h2> USB功率计 立创暑假训练营 电源指示灯 <img src="//image.lceda.cn/pullimage/u9L3ZIQBjLYnZcaFsXZ0V8Dk2hAkfVe9vlgA9u3C.png" alt="u9L3ZIQBjLYnZcaFsXZ0V8Dk2hAkfVe9vlgA9u3C.png"> <img src="//image.lceda.cn/pullimage/BmOO5E5hLfL1lrJpLcFPECnM0SIhTwVX0LYjyMWk.jpeg" width="595" height="446" alt="BmOO5E5hLfL1lrJpLcFPECnM0SIhTwVX0LYjyMWk.jpeg"> 就两个LED，一个3.3V，一个5V 电压转换 <img src="//image.lceda.cn/pullimage/6LqUmuARbJdkZ4A5XTpbsyApBXlN7iHIX2fX1lWj.png" alt="6LqUmuARbJdkZ4A5XTpbsyApBXlN7iHIX2fX1lWj.png"> 通过XC6220B331MR-G将输入的5V电压降压到3.3V给单片机和电流检测芯片供电 <h2>电流检测</h2> <ul><li>INA199</li> </ul><img src="//image.lceda.cn/pullimage/Rv8D7xkfyEkuGmejK5N8a0Aeg5g9y0iSJaGnfyVp.png" width="624" height="306" alt="Rv8D7xkfyEkuGmejK5N8a0Aeg5g9y0iSJaGnfyVp.png"> <img src="//" width="759" height="313" alt="watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpbnhpYW9jaQ==,size_16,color_FFFFFF,t_70"> <img src="//" width="693" height="623" alt="watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpbnhpYW9jaQ==,size_16,color_FFFFFF,t_70"> <h2>电压检测</h2> <ul><li>简单的电阻分压</li> </ul>分压一定要注意的是电压一定要小于3.3V（VADC） <img src="//image.lceda.cn/pullimage/mmjK5qAZAYuCiezLBeqp5gdHBzoKlSIsT6Kuad17.png" alt="mmjK5qAZAYuCiezLBeqp5gdHBzoKlSIsT6Kuad17.png"> <h2>扩展了UART口可以用来传输数据</h2> <img src="//image.lceda.cn/pullimage/uGjIKBjaXO7WvbGNJzOfh29nrxfN25V6vFk1Y3cX.jpeg" width="435" height="326" alt="uGjIKBjaXO7WvbGNJzOfh29nrxfN25V6vFk1Y3cX.jpeg"> 原理图里有一个0Ω的电阻作用是隔离GND。 下面的链接讲了0Ω电阻的作用 <a href="https://www.bilibili.com/read/cv15681591/" target="_blank">https://www.bilibili.com/read/cv15681591/</a>

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Sheet_1

PCB_#第七届立创电赛#USB电流测量

BOM

ID	Name	Designator	Footprint	Quantity	BOM_Supplier	BOM_Supplier Part
1	100nF	C1,C2,C3,C4,C5,C6,C7,C8	C0603	8	LCSC	C385971
2	22uF	C9,C10	C0603	2	LCSC	C237460
3	4.7uF	C11	C0603	1	LCSC	C412628
4	USB-CONN-AM90	CN1	USB-A-TH_AM90	1	LCSC	C9739
5	HDR-M-2.54_1x2	J1	HDR-M-2.54_1X2	1	LCSC	C124375
6	HDR-M-2.54_1x4	J2,J7,J8	HDR-M-2.54_1X4	3	LCSC	C124378
7	HDR-M-2.54_1x1	J3,J4,J5,J6	HDR-M-2.54_1X1	4	LCSC	C81276
8	FC-D1608UGK-520D10	LED1	LED0603-RD	1	LCSC	C84267
9	XL-1608UWC-04	LED2	LED0603-RD_WHITE	1	LCSC	C965808
10	XC6220B331MR-G	Q1	SOT-25-5_L3.0-W1.8-P0.95-LS3.0-BR	1	LCSC	C86534
11	10kΩ	R1,R2,R3,R7,R8	R0603	5	LCSC	C491175
12	0Ω	R4	R0603	1	LCSC	C713447
13	0.01Ω	R5	R2512	1	LCSC	C241862
14	91kΩ	R6	R0805	1	LCSC	C413316
15	K2-1107ST-A4SW-06	SW1	KEY-SMD_L6.2-W3.6-LS8.0	1	LCSC	C118141
16	INA199A1DCKR	U1	SC-70-6_L2.2-W1.3-P0.65-LS2.1-BR	1	LCSC	C59135
17	N32G430C8L7	U2	LQFP-48_L7.0-W7.0-P0.50-LS9.0-BL	1	LCSC	C3032170
18	U-A-24DS-W-1	USB1	USB-A-SMD_U-A-24DS-W-1.	1	LCSC	C530628