How or what to power the LED strip?

Question

Electronics

Hello.
Such a problem, I hung a Wi-Fi RGB tape on the ceiling, the tape was a little less than 20 meters! When I turn on the tape, the speakers that are connected specifically to the computer begin to buzz strongly! The house has a common ground and only two wires in the sockets.
They said to buy a power supply unit like SUCH for the tape , they also said that if a substation is near the house, it's bad, but it's nearby!
Please tell me what can be done and / or what bpshnik to buy?
Here is a native bpshnik from the tape!

Answer 1

what is the power consumption of the tape, they usually give a number of W / m, a
weak bp can not draw.
at least it is worth taking a good electrolyte with a larger capacity somewhere and hanging it on the output. inside the bp, for the sake of the price, they put such lousy conders that you are amazed.

Answer 2

Such a problem, I hung a Wi-Fi RGB tape on the ceiling, the tape was a little less than 20 meters!

As a rule, LED strips are powered from one end. If this is exactly what you have done, then the length of 20 meters is a considerable problem! With such a length, the brightness of the diodes should be greatly weakened towards the end opposite from the power supply, since the full current flows through the printed tracks from the power end for the entire 20-meter tail , and then the voltage drops along the track.
Take a multimeter and measure the voltage between the negative track and the rest along the tape, starting from the end of the power supply and then moving away to the opposite end. You will see a significant voltage drop along the tape. To avoid this, there are two ways: firstly, it is necessary to divide a long tape into pieces 3 ... 5 m long, and feed each such piece through separate wires with a cross section of at least 1.0 square meters. mm (and preferably 1.5), or secondly, which is even better, feed each such piece from a separate PSU (then these PSUs can be placed directly near the fed pieces, and long thick wires are not needed).
I suppose this will also solve your problem with buzzing in the speakers, since many small PSUs will not be as overloaded as one general one.

Answer 3

Campaign bpshnyh defective caught!
On other bp does not buzz!
Which one is better to leave?