Hello.
Where can I buy a shielded audio cable?
The problem is that two Oberton B1200 amplifiers - at minimum amplification have Brum in the outputs + very quiet music.
When I gave up after all the measurements - I slightly moved part of the cables to a different position (now to the toroid...
I got nervous
initially, one channel of the speakers hummed very weakly and was almost inaudible, but directly through headphones at the output, a hum is heard
the problem turned out to be in the amplifier. I found where the input signal of the amplifier is. Even if I short the input of the...
I tried the following today.
It is difficult to test the speakers and I collected test cables (audio headphones connected in series through a small capacitor and resistor) and I was able to hear that the sound from the preamplifier was clear. And when I adjust the output level of the preamp -...
Hello
I have two amplifiers, one of which had a problem with the output relay and I changed it. But I noticed that one channel hums weakly, and the other more loudly.
After swapping the terminals to the preamp, the hum moved to the other channel.
When I tested with an audio signal, the hum...
Hello .
Have a new problem with my motor who have 2 speed ( use in dehumidifier )
Why is there no information on the Internet how to calculate the thickness of a wire and the number of turns and power.
I found the problem quite by accident
When the problem came, I measured the voltage of the lm7812 - input and output = 0 volts.
I started measuring with a multimeter and pushed the electrolytic capacitors and other elements - and when I pushed the fuse housing that is mounted on the circuit...
Hello
There is no one to help in my town.
I have a demo stand for car players and speakers.
After it turns on and works after hours or minutes - it blocks.
There are several boards mounted in the rear end and with the help of non-retentive buttons I select a player and a speaker. The...
no.
In this file ( who i downloaded before days ) i do not see how this 8 x 6 V Batteryes will be conected with cable and 9 pin connector . .
In my case i have 9 wire on this connector .
3 from them - connected to Positive end from Battery pack
3 from them - connected to Minus from...
Hello
I have this UPS - without battery pack and external cabble with 9 pin molex mlx.
I need the circuit to know how to connect the batteries. Because with this connector I have cables from the battery (I suppose is for 48 volts) I have the power cables to the transistor switches but I have 2...
After I did not see the board name (usually write the PCB model), I removed the front panel. But obviously this is a super new version of a PCB and there is no information.
If the connector ( sck sda rst vcc gnd ) ... I now see that some of the captions are used in the oled displays.
And...
Hello guys
I have one request.
I bought a hot air station .This device - at a low price - where the main role for the job is using a microcontroller HR7P169
There is a connector option on the PCB and I suppose it is for reading and overwriting. After the station for me was 30 euros and the...
Ls mecapion apm-sc06ddn-kx
3 phase , 200 V , 3.82 A , 550 W , 200 Hz max , 2000 rpm
Hello .
I have this electric motor, but I have no control.
Can you help me with a scheme to manage it