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  • Drok
    Keymaster
    February 26, 2016 at 2:43 am
    Post count: 2971
    in reply to: Amplifier – connect power #3518

    Hello Jon Perryman,
    Thank you for writing in and your cooperation.
    You can try to solder the power wires to the underside of the board.
    Here is the picture to show you which pin is the +&-:
    Picture_B00C4LB57A
    Hope this will be helpful to you.
    Best regards

    Drok
    Keymaster
    February 26, 2016 at 2:38 am
    Post count: 2971
    in reply to: DROK DROK® 5PCS 3LEDS Handy USB Night Light 5V 150mA 6000k Pocket Nightlight #3516

    Hello Pete,
    Thank you for purchasing.
    Could you please send us an email (service at droking dot com) to tell us your order ID and it is better that you can send some photos of the product together?
    With your help, we can find a solution more effectively.
    Thanks

    Drok
    Keymaster
    February 26, 2016 at 2:12 am
    Post count: 2971
    in reply to: Broken Capacitor #3515

    Hello Don,
    Thank you for your purchasing.
    We are sorry for any trouble caused on you.
    Could you please tell us your order ID or the ASIN of the product you purchased?
    With your help, we can find a solution for you more effectively.
    Best regards

    Drok
    Keymaster
    February 25, 2016 at 7:32 am
    Post count: 2971
    in reply to: Amplifier – connect power #3510

    Hello Jon Perryman，
    Thank you for purchasing.
    Could you please tell us your order ID or the ASIN of the product you purchased?
    Thanks

    Drok
    Keymaster
    February 25, 2016 at 7:29 am
    Post count: 2971
    in reply to: TDA8920 Subwoofer amplifier voltage #3509

    Hello Maziva,
    Thank you for writing in.
    The product needs a ±20V to ±25V DC positive and negative dual power supply.
    Hope this will be helpful to you.
    Best regards

    Drok
    Keymaster
    February 24, 2016 at 8:12 am
    Post count: 2971
    in reply to: Wiring Ammeter Dual #3506

    Hello Edward,
    Thank you for writing in.
    If you have any other questions, please feel free to contact us, we are always here to assist you.
    Best regards

    Drok
    Keymaster
    February 24, 2016 at 3:03 am
    Post count: 2971
    in reply to: Low Frequency Step-up Transformer #3504

    Hello Doug Kimzey,
    Thank you for writing in.
    We are sorry that we do not have the product you are referring to.
    If you have any questions,please feel free to contact us.
    Best regards

    Drok
    Keymaster
    February 24, 2016 at 2:56 am
    Post count: 2971
    in reply to: Problems with Boost Converter 100W/6A 3.5V-30V #3503

    Hello Matteo,
    Thank you for your video and your cooperation.
    Basically, the LED strips need to drive by constant current.
    But this product is only compatible with constant voltage output but not compatible with constant current output.
    If the voltage of the product is boost to 12V, the current will increase suddenly, and then the over-current protection will reduce the output voltage to protect the product.
    Therefore, could you please try to change the constant voltage load and apply 3 series batteries as the power supply?
    Hope this will be helpful to you.
    Best regards

    Drok
    Keymaster
    February 23, 2016 at 4:02 am
    Post count: 2971
    in reply to: DROK® Motor Speed Control Driver Board 10V-60V 10A #3500

    Hello Mike,
    Thank you for writing in and your cooperation.
    There is three Field Effect Transistors in this product.
    As your description, one of them maybe broken.
    We are sorry for any troubles caused on you and all we can do to beg your forgiveness and try our best to make up your loss.
    Could you please tell us your order ID so that we can contact you as soon as possible.
    Beg your understanding.
    Best regards

    Drok
    Keymaster
    February 23, 2016 at 3:51 am
    Post count: 2971
    in reply to: Wiring Ammeter Dual #3499

    Hello Edward,
    Thank you and the same to you.
    We are sorry that we cannot ensure how much accuracy of current reading will be lost as the wires are made longer because different working environment will have different effects.
    It ‘s better that the extended wires between the CT and the meter is less than 2m.
    The wires between the CT and the meter on the unit as it comes out of the box is 150mm.
    If you want to reduce the loss, you can try to apply Shielding line as the extended wire.
    Hope this will be helpful to you.
    Best regards

    Drok
    Keymaster
    February 23, 2016 at 2:55 am
    Post count: 2971
    in reply to: LCD Lead-acid Battery Capacity Tester Gauge Panel wiring diagram #3498

    Hello Michael D,
    Thank you for purchasing.
    The red wire is connected to the positive of the measured battery and the black wire is connected to the negative of the measured battery. That is ok.
    Here is the diagram that we think it is helpful to you.
    Diagram instruction
    Hope this will be helpful to you.
    If you have any questions, please feel free to contact us.
    Best regards

    Drok
    Keymaster
    February 23, 2016 at 1:49 am
    Post count: 2971
    in reply to: Problems with Boost Converter 100W/6A 3.5V-30V #3496

    Hello Matteo,
    Thank you for purchasing.
    Do you debug the product under a load condition?
    If yes, could you please tell us what is the load?
    And it is better that you can sent us some photo of the installation.
    With your help, we can consult to our technician and find a solution more effectively.
    Best regards

    Drok
    Keymaster
    February 22, 2016 at 2:42 am
    Post count: 2971
    in reply to: METER #3465

    Hello MARTIN,
    Thank you for writing in.
    Does ” 100 SHUNT @ 12 VOTS” mean that the shunt you own is 100A/12V?
    Because most of our shunts which the meter is equipped with is 75mV.
    Could you please tell us the parameters of the shunt you own?
    With your help, we can find a solution more effectively.
    Waiting for your reply.
    Best regards

    Drok
    Keymaster
    February 21, 2016 at 7:53 am
    Post count: 2971
    in reply to: DROK Mini USB DC-DC Step Up Converter 3V to 5V 2A Mobile Power Supply Charger #3441

    Hello Pierre Dalterio,
    Thank you for purchasing.
    The USB output and the standard output are connected. You can charge batteries only from the USB output or the standard output. The indicator is charged via the module itself.
    Please note that the output voltage of the USB port is the same as the output voltage of the module, not the fixed 5V output, you must ensure the value before charging for the USB device.
    Here is the datasheet of the product:Datasheet_B00S7YK8KS
    Hope this will be helpful to you.
    Best regards

    Drok
    Keymaster
    February 21, 2016 at 7:06 am
    Post count: 2971
    in reply to: Product D.O.A. #3439

    Hello John,
    Thank you for writing in. We are sorry for any inconvenience caused on you.
    As your description, the product maybe broken in the delivery.
    We will try our best to make up your loss.
    Please pay attention to your Amazon account, we will contact you as soon as possible.
    Beg your forgiveness and understanding.
    Best regards

  • Author
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Viewing 15 posts - 2,746 through 2,760 (of 2,965 total)
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