emails and help

[DrokKeymaster June 7, 2016 at 7:02 am Post count: 2971]

#5308 Reply |

Hello snehal carneiro,
Thank you for writing in.
Here is the Datasheet of the product:
DATASHEET_200142
Hope this can help you.
Best regards

[snehal carneiro June 7, 2016 at 10:26 am Post count: 0]

#5311 Reply |

Will this amplifier work good with a supply of 12v 5amp, 120w dc adapter. Looking forward for your reply.
Thank you!
Product: Micro tda 7377 35w+35w dual channel.

[snehal carneiro June 7, 2016 at 12:11 pm Post count: 0]

#5312 Reply |

Let me know the best configuration of power supply for micro tda7377 35+35w amplifier
1 12volt 5amp
2 15volt 5amp

[DrokKeymaster June 8, 2016 at 2:59 am Post count: 2971]

#5325 Reply |

Hello snehal carneiro,
Thank you for writing in.
The 12V 5A 120W DC adapter is suitable for the amplifier.
And the power supply of 12V 5A would be the best configuration for this product.
Hope this can help you.
Best regards

[Al July 5, 2016 at 5:52 pm Post count: 0]

#6151 Reply |

I’d like to combine two of your products in to one device. If there was an off the shelf solution it would save me a lot of work and I would buy hundreds. The two products are your FET load and your USB meter Let me know if this is something that you already have or if you would be interested in developing.

[DrokKeymaster July 6, 2016 at 2:38 am Post count: 2971]

#6173 Reply |

Hello Al,
Thank you for writing in.
Here is a recommendation for you:
Part number: 200186
DROK® DC 3-21V Load Battery Tester, 35W 3A Portable USB Monitor, Intelligent Constant Current Electric Discharge Resistance Power Resistor Kit for Power Bank Capacity Testing Support QC2.0/3.0

TECHNICAL PARAMETERS:
Voltage Range: DC 3-21V (compatible with quick charging such as the Qualcomm QC2.0, 5V/9V/12V/20V, Qualcomm QC3.0, BC 1.2, MTK-PE and Apple 2.4A etc.)
Current Range: 0-3A continuously adjustable (roughly adjust 0-3A by per 0.1A , precisely adjust by per 0.01A)
Accumulative Capacitance Range: 0-99999mAH
Accumulative Electric Energy Range: 0-999.99Wh
Power Range: 0-35W( the continuous discharging power is less than 35W)
Accumulative Time Counting: 0-1000h
Voltage Testing Deviation: 0.01V
Threshold of Smart Temperature Control: when the temperature﹥55℃（131℉), the fan would automatically work; when﹤45℃(113℉), the fan would automatically turn back off
Detector of Smart Temperature Control: premium NTC thermistor
Switching Regulator IC Frequency for Fan: 1.2MHZ
Power Supply Indicator: blue light when powering on
Fan Speed: 6000/min, 40×40×20mm
Controlling Chip: constant current chip
Radiator: 6063 aerospace aluminum radiator, 40×40×10mm
Adjustment Potentiometer: durable metal potentiometer
Discharging Power Tube: voltage-controlled low-impedance MOSFET (more stable constant current when is on high voltage, high temperature)
Operating Temperature: ﹣10 ~﹢65℃ (14-149℉)
Product Dimensions: 100mm×48mm×30mm

WARM TIPS
When operating a burn-in test discharging, the resistor would get hot, about at 80-85℃, so please note not to be hurt by the heat.

Hope this can help you.
Best regards

[Frank Palm July 7, 2016 at 9:34 pm Post count: 0]

#6212 Reply |

Can I use a Drok DC/DC 12V to 9V transformer in my high end audio system?
The 12VDC supply is from a regulated, filtered power supply but I need 9 Volts for another component without adding any switching noise either up or down the power lines.
Thanks….Frank

[DrokKeymaster July 8, 2016 at 2:41 am Post count: 2971]

#6234 Reply |

Hello Frank Palm,
Thank you for writing in.
Since many products are with similar titles, it is hard for us to ensure which product you are referring to.
Could you please tell us your order ID or the link of the product?
It is better that you can tell us more details of your application, such as the load, the working environment.
As you have said that “without adding any switching noise either up or down the power lines”, does the power supply will always provide 12V steady DC power or does the voltage will go down even lower than 9V?
With your help, we can find a solution more quickly.
Waiting for your reply.
Best regards

[Don Oldfield September 8, 2016 at 2:30 am Post count: 0]

#8315 Reply |

I purchased drok J7-B/C/D 6-in-1 unit because it was rated up to 25vdc and 5.1 amps on input. I want to use it on the output of a solar panel array which can have as much as 18vdc (open circuit voltage) – then, after further reading, it looks like the DROK unit may have a problem after the voltage goes past 13.1 vdc. Please let me know if I can apply apply 18 vdc to this model DROK.

[Kai Kilian September 8, 2016 at 3:41 pm Post count: 0]

#8337 Reply |

Hi, I recently bought the Bluetooth Amp for my Renault Twizy. I wanted to aks, is there any chance to disable the “welcome melody”, because it is not in an area where I can regulate the volume while starting my vehicle, so the melody is blasting very loud every time I start the car.
Hope you can help because I like the device actually, but this feature is really annoying…
Thanks a lot.

[DrokKeymaster September 9, 2016 at 3:15 am Post count: 2971]

#8363 Reply |

Hello Don Oldfield,
Thank you for writing in.
Could you please tell us your order ID or the link of the product so that we can ensure which product you are referring to?
With your help, we can find a solution more quickly.
Best reagrds

[DrokKeymaster September 9, 2016 at 3:18 am Post count: 2971]

#8364 Reply |

Hello Kai Kilian,
Thank you you message.
So sorry that it is hard for us ensure which product you are referring to by the limited information.
Could you please tell us your order ID or the link of the product?
Waiting for your reply.
Best regards

[Angel September 9, 2016 at 2:27 pm Post count: 0]

#8386 Reply |

Hello DROK Support,
I have bought your product – https://www.amazon.co.uk/gp/product/B00GX3YWNE/ but unfortunately I didn’t get it to work.
The case – I have 5.0 V input and I need 12.0 V output. When the device is connected, I can see the input (4.9V) and the initial output 4.9V by pressing (IN), (OUT) button respectively. So far so good.
In case I press (set) button, the part before decimal point starts to flash however nevertheless how many times I press (+) button, the output value doesn’t increase. I can decrease it and then increase again but up to 3.9V only. So I started with 4.9 output and ended up with 3.9V.
If I press (set) button twice, the part after the decimal point starts to flash I can increase / decrease in 1/10 of V.
To summarize – with 4.9V input I have got 3.9V output and this is not what I actually need.
Please help,
Thanks!

[DrokKeymaster September 12, 2016 at 2:54 am Post count: 2971]

#8653 Reply |

Hello Angel,
Thank you for writing in.
We have checked the product link that the product is a buck converter, not a boost converter.
Therefore, it cannot make 5V input step up to 12V output.
Could you please check your order again that if you send a wrong product link to us?
Looking forward to hearing from you.
Best regards

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