YAGI Antena For CDMA Modem

Posted by doctor on 11.10 0 komentar

Yagi antenna can be used as a reinforcement signal from the modem usb / wifi.
This picture scheme yagi antenna for the modem / wifi


Additional Power Supply For USB

Posted by doctor on 10.37 0 komentar

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.