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  • Drok
    Keymaster
    October 20, 2017 at 10:00 am
    Post count: 2971
    in reply to: DC Digital Volt Meter #23390

    Hello Richard,
    To check problem more carefully, would you pease take some picutres to show us the problem? And what is the load? Is it connected to 24V storage battery on boat?
    With your help,we can find out solution for you more quickly.
    Best regards.

    Drok
    Keymaster
    October 20, 2017 at 9:49 am
    Post count: 2971
    in reply to: DROK 10pcs Micro 130 DC Motor, DC 3-6V 16500 RPM Cars Toys Electric Motor, High #23389

    Hello Mary B,
    Thanks for writing in.
    Please change to AAA battery or AA battery. CR2032 is not suitable for this item and is easily to be drained.
    Hope this can help you.
    Best regards.

    Drok
    Keymaster
    October 20, 2017 at 9:46 am
    Post count: 2971
    in reply to: LTC1871 3.5V-30V DC Boost Converter #23388

    Hello Steve Maddigan,
    Thanks for writing in.
    About schematic, we are sorry our technician team doesn’t allow us to show it on public. Hope you can understand.
    For charging battery, you can add diode to protect battery.
    But we are not sure if there are something wrong, output voltage you wrote is 14V4.
    This item is boost converter, as long as the input is lower that output, the outpout voltage will not change.
    Best regards

    Drok
    Keymaster
    October 18, 2017 at 8:58 am
    Post count: 2971
    in reply to: JDM11-6H lcd counter #23349

    Hello Bernie McCaffery,
    Thanks for writing in.
    Are you talking about this item？ https://www.amazon.com/gp/product/B01GRTG9SE
    The width of the shutter can’t be changed. And the ideal distance for detecting should be within 30cm. Hope this can help you.
    Best regards.

    Drok
    Keymaster
    October 18, 2017 at 8:48 am
    Post count: 2971
    in reply to: DC Digital Volt Meter #23348

    Hello Richard,
    Thanks for writing in.
    To find out solution for you, would you please firstly let us know which item you mean? Could you send us the product link or tell us the ASIN number(it is showed on Amazon product page)?
    And please tell us more details about your opeartion. For example, wiring. Is it convenient for you to take some pictures to show how it is? If you can’t upload pictures here, please kindly send it to our service email.(service@droking.com)
    With more information, we can find out problem quickly.
    Best regards.

    Drok
    Keymaster
    October 17, 2017 at 9:14 am
    Post count: 2971
    in reply to: VAC-1030A Jumper 3W / 2W #23326

    Hello John Molendijk,
    Thanks for your message.
    Do you means this item? https://www.amazon.com/dp/B06XFZ6PC4
    The W3,W2 jumper on this item are not for customer usage, so you don’t need to think about it.
    Best regards.

    Drok
    Keymaster
    October 17, 2017 at 8:53 am
    Post count: 2971
    in reply to: constant current buck PWM not working right? #23324

    Hello rokenbuzz,
    We are terribly sorry we just found we miss your message.
    Actually, this PWM control is not linear. PWM adjustment is contrary to output.
    That is to say, only PWM input become 0, output is 100% value.
    Best regards.

    Drok
    Keymaster
    October 17, 2017 at 7:26 am
    Post count: 2971
    in reply to: DROK Mini USB DC-DC Step Up Converter 3V to 5V 2A Mobile Power Supply Charger #23323

    Hello quinn miller,
    Thanks for writing in.
    Is it this item?
    https://www.amazon.com/dp/B014J2UJL4/ref=twister_B015C3GDEQ?_encoding=UTF8&psc=1
    The “key” port can be connected to external power supply. Without load, boost can still stay active.
    Best regards.

    Drok
    Keymaster
    October 16, 2017 at 10:03 am
    Post count: 2971
    in reply to: DC to DC boost #23314

    Hello Jerry Porter,
    We have many boost converter can meet this requirement. Do you have any other requirement?
    Best regards.

    Drok
    Keymaster
    October 16, 2017 at 9:56 am
    Post count: 2971
    in reply to: DROK Red LED Panel Display Digital Voltmeter Small 0.28" DC 0~~100V #23312

    Hello Charlie Trump，
    Thanks for your message.
    There are many similar product,would you please send us the product link for confirmation?
    We will try our best to find solution for you.
    Best regfards.

    Drok
    Keymaster
    October 16, 2017 at 9:54 am
    Post count: 2971
    in reply to: dc charging lifepo4 #23311

    Hello Todd Neidinger，
    We can’t ensure exactly the item you need with limited parameterss. Do you need a buck converter?
    Best regards.

    Drok
    Keymaster
    October 16, 2017 at 8:25 am
    Post count: 2971
    in reply to: TTL to RS485 #23308

    Hello Mark,
    Thank for writign in.
    Would you please tell us which item you mean?
    We will reply to you once we confirm the item.
    Best regards.

    Drok
    Keymaster
    October 16, 2017 at 8:01 am
    Post count: 2971
    in reply to: DROK®Micro LED DC-DC Digital Boost Voltage Converter LM2577 3-34V to 4-35V 5V/12 #23307

    Hello Questionman,
    Thanks for writing in.
    To check what wrong with it, would you please firstly let us know exactly which item you mean? Is it this one?https://www.amazon.com/dp/B00C9179WK

    What is the actual output voltage and current at that time?
    With more informatin, we can find out solution for you more quickly.
    Best regards.

    Drok
    Keymaster
    October 13, 2017 at 9:48 am
    Post count: 2971
    in reply to: 8-63V programming #23169

    Hello thomas,
    Thanks for writing in.
    Before powering on the module, keep pressing the button on the back of the module (do not release), and then connect power to it.
    The monitor will display the battery specification, then press the button again to choose the battery specification.
    After choosing the specification you need, cut off the power and then power the module again. The adjustment is finished.
    Hope this can help you.
    Best regards.

    Drok
    Keymaster
    October 12, 2017 at 8:36 am
    Post count: 2971
    in reply to: Need a Step up for my 9.25 Amp 19.5 Laptop #23110

    Hello PhillipCrawley,
    Thanks for writing in.
    What is your requirement for output current? This item can’t adjust output current, which is up to load. And do you need LED display?
    Best regards.

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Viewing 15 posts - 1,546 through 1,560 (of 2,965 total)
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