I would like to use the network cable to do an 18M USB-extension line, with the two lines in the network and into a line to use, filter to the line too long USB power shortage, I would like to add another USB in the end of a small switching power supply output 5V, and then to drive the wireless card, who can DC4V to DC5V small switching power supply circuit, brother Xianxie over the problem added: I would like to use the computer from the USB cable to lead the battery, after ten meters of cable attenuation only 4V Around, and then 4V to 5V for the network card, so you can save two lines. More
Very simple to buy a 7805 three-terminal regulator, plus a higher than 5V DC power to get
I also see. I also want to engage in this one. Eat rice.
Google library has a lot of public water and electricity cost of the detailed quotation you can refer to
, then the audio cable and video cable [audio line (red and white), and then use the audio cable and the video cable (red and white) , Video line (yellow)】 corresponding to the color connection set-top box with TV
