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2Instructables1,399Views24CommentsBuon Ma Thuot, DakLak Province, VietNam

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  • DakLak commented on henal's instructable Converting Cordless To Lithium Li-Po3 weeks ago
    Converting Cordless To Lithium Li-Po

    I 100% AGREE! My company uses Lithium and LiPo batteries by the carton - the dirty brown carton - and you should NEVER charge these battery types without a BMS (Battery Monitor System) aka Battery Balancer.There are about ten circuits on Google if you want to make one.

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    • Free PCB Schematic Entry & Layout Software Beat Eagle for Some Features
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  • DakLak's instructable I Hate Eagle: Round Polygons In 4 Clicks!'s weekly stats: 1 month ago
    • I Hate Eagle: Round Polygons In 4 Clicks!
      213 views
      6 favorites
      1 comments
  • DakLak commented on westfw's instructable Turn your EAGLE schematic into a PCB2 months ago
    Turn your EAGLE schematic into a PCB

    There is a worse program - Fritzing! Sadly, Adafruit has even started using it.Eagle has some very Germanic characteristics, which people refer to as quirky.Some of the free programs tied to/issued by PCB manufacturers are some of the easiest to actually use AND allow you to do unusual things. Then you can convert them in to common PCB formats using a piece of software from Robot Room called Copper Connection PCB Editor >http://www.robotroom.com/PCBs-Breadboards.html<.I actually am involved the design of military robotics and infra-red systems and often use low-end PCB layout software rather than firing up the Credence software we also use.

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  • DakLak commented on cdonnelly2's instructable Acrylic Bending Jig2 months ago
    Acrylic Bending Jig

    I completed a bender based upon your article. Thank you, you saved me some time.My bender, which is used to bend Polycarbonate, has a small addition - a radiant heat bar with variable control for warming up the material.

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  • DakLak commented on comodore's instructable How to make a fast blinking LED bike light2 months ago
    How to make a fast blinking LED bike light

    E-Bay/Amazon resellers usually buy the cheapest LEDs from China.I live in VietNam and the cheapest (ungraded) LEDs are sold by the kilogram, as are the lowest quality graded LEDs.The best quality are graded and sold by the 'each' price. Bright Red 3mm LEDs are going for 10 for USD$00.01 (1 cent) today.

    I made this and fitted it to my motorcycle helmet so even crazy Vinasun taxi drivers can see someone is in front of them!

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  • DakLak commented on shams's instructable Very simple PWM with 555...Modulate every thing2 months ago
    Very simple PWM with 555...Modulate every thing

    If you search the EDN web site, and others, and look under 'electric bikes' and 'electric wheelchairs' you will find plenty of ideas.One site, from Australia, has a powered skate board (or whatever they are called) and has a complete D-I-Y 3-part articles.

    Warehouse tug-motor fork lifts have 2 VDC batteries and they output 50-100Amps!

    I have a Kymco - 100% LED. My build.You have to remember that a battery's voltage can vary under normal conditions between 11-16 VDC depending upon engine speed. The voltage is even lower under start conditions.A typical 3-pin regulator has about a 2V drop between input and output - so the output will vary between 9-15VDC.Likely you have LEDs in series, Therefore, rearranging the series combinations to reduce the number of series LEDs will make them brighter (don't forget to make adjustments in the supply circuits) and your 'hog' will always supply sufficient current to drive the LEDs.I also picked up the power for my running light spots from where the generator output is fed to the battery. Be careful if you mess with the generator connections - one connection on modern machines is ded...see more »I have a Kymco - 100% LED. My build.You have to remember that a battery's voltage can vary under normal conditions between 11-16 VDC depending upon engine speed. The voltage is even lower under start conditions.A typical 3-pin regulator has about a 2V drop between input and output - so the output will vary between 9-15VDC.Likely you have LEDs in series, Therefore, rearranging the series combinations to reduce the number of series LEDs will make them brighter (don't forget to make adjustments in the supply circuits) and your 'hog' will always supply sufficient current to drive the LEDs.I also picked up the power for my running light spots from where the generator output is fed to the battery. Be careful if you mess with the generator connections - one connection on modern machines is dedicated to the ignition feed.BTW, modern cars with super-bright LEDs cheat, often they are using a buck-boost power source and the LEDs are running as high as 60 Volts! Drive safe.

    Why the speed range? My daylight running lights operate at 4 Hz (four flashes per second) and the highest I use, at night, is 20kHz.

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  • Ultimate Night Vision Headlamp - 500+ lumens with only 8 watts

    I made a few of these (3W LEDs are cheap where I live).One is made from IR LEDs designed purely to blind IR CCTV cameras. Also works great blinding number plate CCTV cameras.

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  • DakLak commented on RedWagon's instructable The Definitive Guide to LED Accent Lighting3 months ago
    The Definitive Guide to LED Accent Lighting

    Re: "Waterproof"The company I work for designs LED applications for buildings and automotive 'bling' applications.Your description of "waterproof" is misleading, splashproof is likely what you have."Splashproof" strip lighting is terminated in a pair of wires and covered with usually, white, heatshrink."Waterproof" strip lighting is terminated in a plastic cover that is molded on to the lighting strip. There is also about a 30-40% premium charged for this. Additionally, the plastic covering the LEDs is far less likely to discolour due to UV (sunlight) exposure.There is, also, consideration to be given to the safety aspects of these LED strips and how/what they powered by.

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  • DakLak commented on Constructed's instructable 100w LED Flashlight 1 year ago
    100w LED Flashlight

    Have a look at < >. The presenter uses a variable power supply to show that many of the LEDs are actually defective!

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  • Program & Control Arduino + PHIRO robot simultaneously with Pocket Code smartphone app

    After writing our own App for controlling military-type robots (the types that go BANG!), for developing countries, I sure appreciate learning about the Google App, thanks to you we have improved out products!

    After writing our own Apps for controlling military/industrial-type robots (the types that go BANG!), for developing countries, I sure appreciate learning about the Google App, thanks to you we have improved our products!And our App writers don't look so clever now.

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  • DakLak commented on edy's instructable Easy GoPro Macro Ring Light1 year ago
    Easy GoPro Macro Ring Light

    GoPro (at least my model) has a round lens bezel and my SJCAM SJ5000X (by far a superior range of cameras given their price/feature ratio) has a square lens bezel. For both I have manufactured polycarbonate sleeves that slip firmly over the appropriate lens for attaching to a copying frame which I place over the object to be photographed.Now, having seen your concept, and excellent article, I have changed my configuration so that your ring-light is attached to the lens sleeves and the camera's mounts are used to attach to the stand.GoPro cameras have to be used with their cases since part of the lens is within the camera case.The lens of SJ5000X is wholly within the camera, which means the case can be dispensed with for this use, allowing the camera to hold the light-ring even more clos...see more »GoPro (at least my model) has a round lens bezel and my SJCAM SJ5000X (by far a superior range of cameras given their price/feature ratio) has a square lens bezel. For both I have manufactured polycarbonate sleeves that slip firmly over the appropriate lens for attaching to a copying frame which I place over the object to be photographed.Now, having seen your concept, and excellent article, I have changed my configuration so that your ring-light is attached to the lens sleeves and the camera's mounts are used to attach to the stand.GoPro cameras have to be used with their cases since part of the lens is within the camera case.The lens of SJ5000X is wholly within the camera, which means the case can be dispensed with for this use, allowing the camera to hold the light-ring even more closer to the lens, giving a better quality photograph.I have my own Argon stainless steel welding set so manufacturing stands is no problem. Next I intend to make a microscope-like stand so I can use a knob to frame the object being shot.Keep up the great work!

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  • DakLak commented on jaksherry's instructable 100W LED in PVC Flashlight1 year ago
    100W LED in PVC Flashlight

    An alumin(i)um tube would be best as that metal has superior heat conducting propertoes.

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  • DakLak commented on Constructed's instructable 100w LED Flashlight 1 year ago
    100w LED Flashlight

    I have a bit of a fetish for LEDs and LED lasers, especially since living next to China, in VietNam, where we buy LEDs by weight and not by the count - at least up to 3W units.My LEDs are from an importer which means my supplies are 'loose' - and one of the things I buy are circular alumin(i)um PCBs. The conductive tracks are insulated from the alumin(i)um by a carrier film.Where the LEDs are situated are naked circles of exposed alumin(i)um so that heat transfer, using heat conductive paste, is optimised.The LEDs are of the builders choice, the only constraint being the PCB, but I use 3W units connected in series / parallel which is the choice of the professional illumination companies. They never use a single high-power LED. The series / parallel configuration allows the LEDs to be dr...see more »I have a bit of a fetish for LEDs and LED lasers, especially since living next to China, in VietNam, where we buy LEDs by weight and not by the count - at least up to 3W units.My LEDs are from an importer which means my supplies are 'loose' - and one of the things I buy are circular alumin(i)um PCBs. The conductive tracks are insulated from the alumin(i)um by a carrier film.Where the LEDs are situated are naked circles of exposed alumin(i)um so that heat transfer, using heat conductive paste, is optimised.The LEDs are of the builders choice, the only constraint being the PCB, but I use 3W units connected in series / parallel which is the choice of the professional illumination companies. They never use a single high-power LED. The series / parallel configuration allows the LEDs to be driven at optimum levels from a 12V power source. And don't forget a breaker or fuse in the power feed.Power consumption is minimised by use of PWM based on a 555-timer chips and a handful of components. The frequency and waveform ratio can be preset or brought out as controls.In a couple of my larger 'flashlights' I have mounted a single LED laser - green is best for temporarily blinding people - under a separate control. I use stainless steel Grade 302 for my cases.I use LEDs on my motorcycles for daylight running lights, the headlight, etc. Bus drivers, who tend not to dip their headlights for motorcycles, get respect when I crank all the LEDs up to brightest.///

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  • DakLak commented on Just4Fun Media's instructable Fix Your QuadCopter1 year ago
    Fix Your QuadCopter

    BENT PROPS, if commercially moulded - not 3D - can sometimes be returned to their original profile by very, very, gently heating them in an oven - whilst you monitor their resurrection through the viewing window.Leave them alone and they might melt!

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  • Phosphorescent Bike With Ultraviolet LEDS

    You have a great looking workshop there, sign of a true craftsman. About those wine bottles - are they for a mid-project break?

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  • DakLak commented on MichaelA29's instructable Iphone Cable Repair1 year ago
    Iphone Cable Repair

    Apple thinks of everything to keep on making that money. Perhaps they even have a patent on that cheap cable sheath that fails when someone tries to repair it.

    I have used heat shrink tubing but it has a shirt finite life until it splits.

    Great implementation! Pity IVES didn't have enough practical smarts as you have.Of course, we should remember Apple depends on cheap quality cables to leep their cash flow, flowing.

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