树莓派无线监控小车菜鸟教程!!!!（2013.7.9更新）

jady · 发表于 2014-9-19 21:21:58

brucehelen 发表于 2014-9-19 10:33
你这个没有驱动电路啊，直接接到芯片的GPIO上面？
小心烧板子

是的，我也刚发现这个问题，直流电机还需要驱动吗？我的理解有电压差电机就动了，还需要什么的要的驱动？望指教。还有楼主的原理图上电机只画了GPIO输入，输入的是电机的正极还是负极啊？

brucehelen · 发表于 2014-9-20 08:32:01

jady 发表于 2014-9-19 21:21
是的，我也刚发现这个问题，直流电机还需要驱动吗？我的理解有电压差电机就动了，还需要什么的要的驱动？ ...

直流电机，步进电机都需要驱动电路
芯片的GPIO提供毫安级的电流，带不动电机的，就算带动了也没劲。
一般的小电机都需要1A的驱动电流，所以必须加驱动电路。

jady · 发表于 2014-9-21 13:23:38

brucehelen 发表于 2014-9-20 08:32
直流电机，步进电机都需要驱动电路
芯片的GPIO提供毫安级的电流，带不动电机的，就算带动了也没劲。
一般 ...

多谢，了解了！

jady · 发表于 2014-10-16 22:14:03

root@raspberrypi:/home/pi/practise/camera/mjpg-streamer-code-182/mjpg-streamer# sudo ./start.sh
MJPG Streamer Version: svn rev: Unversioned directory
i: Using V4L2 device.: /dev/video0
i: Desired Resolution: 640 x 480
i: Frames Per Second.: 5
i: Format............: MJPEG
Adding control for Pan (relative)
UVCIOC_CTRL_ADD - Error: Inappropriate ioctl for device
Adding control for Tilt (relative)
UVCIOC_CTRL_ADD - Error: Inappropriate ioctl for device
Adding control for Pan Reset
UVCIOC_CTRL_ADD - Error: Inappropriate ioctl for device
Adding control for Tilt Reset
UVCIOC_CTRL_ADD - Error: Inappropriate ioctl for device
Adding control for Pan/tilt Reset
UVCIOC_CTRL_ADD - Error: Inappropriate ioctl for device
Adding control for Focus (absolute)
UVCIOC_CTRL_ADD - Error: Inappropriate ioctl for device
mapping control for Pan (relative)
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for Tilt (relative)
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for Pan Reset
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for Tilt Reset
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for Pan/tilt Reset
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for Focus (absolute)
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for LED1 Mode
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for LED1 Frequency
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for Disable video processing
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
mapping control for Raw bits per pixel
UVCIOC_CTRL_MAP - Error: Inappropriate ioctl for device
o: www-folder-path...: ./www/
o: HTTP TCP port.....: 8080
o: username:password.: disabled
o: commands..........: enabled

貌似不行噢，我的摄像头驱动是找到了，下载的软件里没有steam.sh脚本，make了一下然后执行。、start.sh就报了上面的错误，摄像头不兼容？