一台健伍KR-V7080功放无声，显示正常，救助# KENWOOD建伍 KR-V7080 电路图
2025-03-30 20:21
我根据法罗力壁挂炉电路板实物绘制出了电路图，确实很复杂，请高手帮我分析一下，看看有啥问题吗？；
2025-03-30 20:09
Hi，大家好，我最近用hpm6e80评估板做winusb的速度测试，发现usb的读写速度只有大约的 3.2MB/s，比普通USB速度低了很多，后面我用USB Packet Viewer抓取USB 报文，发现OUT传输出现了大量的NYET握手包，而不是ACK，这个初步分析是hpm usb驱动OUT报文接收不过来，这个要怎么优化？
2025-03-30 15:03
在labview中调用media player控件播放视频，前面板的大小会根据分辨率的大小自动调节调用media player面板的大小，无法固定大小，应该怎么解决，我试着在后面板里更改过所调用的active控件的属性，将其放在循环里反复执行我想要的那个大小但是他无效，我放过一个显示控件他那个屏幕大小会跟边界大小同步但是不能写入
2025-03-30 13:46
我是想通过实验了解上拉电阻和下拉电阻的实际作用，上面的电压是5v,想问的是没有电流流过怎么导致的电位上升，使用的8051单片机
2025-03-30 13:07
求一个BLE低功耗蓝牙 ch592f新增seriver的例程
2025-03-30 02:04
在EVK上启用Spread Spectrum时遇到问题，求解答 EVKSpread
2025-03-30 01:26
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2025-03-30 01:24
如题，有单片机方面的内容需要请教一下 (先叠个甲)纯小白 我需要一个单片机控制模块，我现在的想法是：在一个单片机上，我要让他控制一个传感器和一个步进电机（运动系统，运动距离为13.5cm），同时单片机本身具有定时系统，当传感器检测到障碍物以后发出警报并停止运动系统运行，让步进电机自动回到初始位置，对于这个系统我还要依靠单片机本身的定时功能来进行每天一次的往返运动。 传感器目前暂定为红外传感器，监测范围为3cm；在单片机上还要有个单独的能控制步进电机随时运行的接口，保证能在任何时间使用步进电机而且定时系统不受影响
2025-03-29 18:35
芯片是STM32F407TGT6，灯的IO口是GPIOB6/7，使用的是通用定时器TIM4。代码烧录到板子led什么反应没有，调了好久了[捂脸]
2025-03-29 16:54
