we get the problem on a PC or laptop in reading the USB device.
problem that often arises is unable to read the usb device. This is caused by a lack of supply voltage. to solve this problem let's try to make additional power supply.
see scheme below :
list the components needed :
Electrolit Condensator 47Uf/25V
Electrolit Condensator 47Uf/16V
IC AN 7805 with heatsink
Additional Power Supply USB can be used for extension cable USB 10 - 20m. to get a good power supply use a quality cable.