Directional antenna and down converter to power the modem with your own hands

What to do when the provider cannot solve the problem with access to the network of your beloved granny? But the older generation also wants to be in touch and comprehend the world without leaving home. Our reader shared his recipe. Under the cut a short story about how to assemble a wi-fi transmitter from improvised means.



I have DSL-Internet at home, and my grandmother, who lives in a kilometer of direct visibility from me, does not have the ability to connect it. The provider simply does not have free resources. Therefore, it was decided to assemble a wi-fi transmitter by own efforts, fixing it on the trick of the house.



An electric shield was used as the body. It was installed DSL modem TP Link and wi-fi access point D-Link dwl-2100ap.

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The power was increased to 1 W using the engineering menu. He built a directional antenna with the help of an ordinary beer can. The main problem was caused by power supply, since it is dangerous to drive a 220V cable directly through the roof. In winter there is humid, and in addition to this wire can gnaw mice. It is close to the circuit and fire.



As a result, it was decided to stretch the roof 12 in from a reliable bespereboynika to 8 amps, which can save from short circuits. It is installed inside the system unit. But the modem and the access point require a power supply of 5 volts, and the total current of 1.5 amperes. I tried to make DVRs from standard charging, where 2 amps are indicated, but it overheated terribly.



The solution was found on the Internet. Thanks to this scheme:







From the elements of the computer unit I managed to assemble this:















The circuit works reliably for several years and does not heat up. And granny has a stable signal.