How does the drawing of the cableboard of the design institute draw
The appearance of a good copper wire is brassy, bright and bright, poor copper appearance is dark, dull
4v to 5v? This is not much trouble, just buy a mobile phone charger is 5V output, the direct use on the line. Line is too long, then the other power supply, or should add a 16v / 2200uf above the large capacitor filter. USB cable directly more than 10 meters of finished products for sale. If you want to use a wireless card, it is best to find a shielded USB cable, if not, with the cable is no problem, the connection is recommended to use a twisted pair as a signal, the other as a power supply, then the different power and Even so that the power cord can reduce interference for the signal.
First look at the skin, good general fold many times constantly, then look at the copper wire thickness, the same specifications of the wire, the more thick copper wire the better
