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  • sifu-dianji followed 3D Printing channel 2 weeks ago
  • sifu-dianji commented on Constructed's instructable Worlds Smallest Drone!3 months ago
    Worlds Smallest Drone!

    Don't worry about it, I often have similar problems as I use a phone camera with no stand, and it can be very difficult to control a drone whilst filming

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  • sifu-dianji commented on Constructed's instructable Worlds Smallest Drone!3 months ago
    Worlds Smallest Drone!

    I don't want to seem rude, but in the video it doesn't fly very high-end is it capable of flying without aid from (sorry if this is the wrong terminology) the ground effect?

    Sorry, autocorrect, I meant *it didn't fly very high- is it

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  • The Crawli - A Simple Walking Soft Robot

    This is sooo ingenious! however, it looks like it slips a bit on each step. adding more surface area or weight should fix this.this would also be cool in a hexapod

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  • sifu-dianji commented on philetus's instructable howto flipdot with a raspi3 months ago
    howto flipdot with a raspi

    That display is so cool! The only problem is that it must cost an arm and a leg, and an LCD costs a few quid...

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  • Micro USB Lithium charger for cilindrical Lithium baterry

    If the charger blew up when you tried to use it my advise would be to assume the other parts had similar production values, and to look for lipo disposal methods. cheap chinese lipos from ebay are a no-no

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  • sifu-dianji commented on The Oakland Toy Lab's instructable Splitting Water the Easy Way3 months ago
    Splitting Water the Easy Way

    I'm pretty sure that that's illegal due to it being pretty much a huge flying bomb- helium is legal, but harder to obtain

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  • sifu-dianji commented on taifur's instructable Complete Motor guide for Robotics3 months ago
    Complete Motor guide for Robotics

    Not to be rude or condescending, but I think you mean 3A... I made a similar mistake and my power transistor almost popped! Also, try ebay but be sure to turn "search description" on

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  • sifu-dianji commented on The Oakland Toy Lab's instructable Splitting Water the Easy Way3 months ago
    Splitting Water the Easy Way

    In a seemingly up to date chemistry book I read, it said that saltwater will yield hydrogen, NaO (bleach) and chlorine gas, but I can't remember under which conditions- but I may be wrong here if I forgot a step

    I did the same thing, at the same age a few weeks ago! But I only had a few cubic centimetres (albeit under slight pressure) due to the size of my container. However when it blew up via a controlled short circuit, the bung of the test tube disappeared like magic, and I had to blame the loud pop/bang on a draw being dropped!

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  • sifu-dianji commented on CyberJaws's instructable Bird Boredom Buster3 months ago
    Bird Boredom Buster

    Ha ha, my bird would love this! She has a habit of savaging toys when she moults tho...

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  • DIY Arduino PIR Motion Sensor Lighting & Security

    anyone here know if you can get/make a real time (ie. no time delay) PIR? I'm trying to make a robotic hexapod that tracks movement. the code and body are already working, but the 2 second delay makes it move erraticaly- spining round and round and charging forwards into walls. thanks for any suggestions!

    sorry if this was badly worded, but my problem is that the PIR itself, not the arduino's code, goes to +5v for 2 seconds when it senses movement- are there models available that don't do this? all of the ones I have seen on ebay/amazon do this

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  • sifu-dianji commented on noahw's instructable LEDs for Beginners4 months ago
    LEDs for Beginners

    I learnt this the hard way when a year or so ago, I bought some flashy new UV LEDs and put them in parallel to make a lamp, then watched them all fry

    if you saw a groove in a resistor, this will increase the resistance but drop the wattage rating (and your chances of a refund if stuff goes wrong)- just a helpful tip incase wattage isn't a problem and the ohms are just two low

    ALWAYS use 1:1, so yeah, that looks right

    microcontrollers can easily do what weeks of analog or IC design would struggle with. at £3 a pop for a arduino nano with 13 io ports, ic2, 8 analog ports, serial connections and 6 PWM lines, which will also run many other functions, why not? otherwise, you end up with a huge horrible mess of ANDs, 555s, 4017s, ORs, capacitors, NANDs, resistors, diodes and wires ect. whilst trying in vain to find that ONE dry joint in a million connections- I've been there, and digital is easier trust me.

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