Tell us about yourself!

Complete Your Profile
  • How to Connect PET Bottles for TrussFab Structures

    You get a presta bike valve from an old bike tire,drill a hold in a bottle cap for the bike valve,insert the end of the bike through the hole,add a nut and washers and teflon gas tape to either side.Then attach your bike pump and pump away.The air cannon/pop bottle rocket projects have lots of alternative designs for inflating a pop bottle using a bike pump.

    View Instructable »
  • How to Connect PET Bottles for TrussFab Structures

    If you just need the liquid nitrogen/dry ice to reinflate the bottles so that they fill the sleeve, I would look a a bottle cap outfitted with a bicycle tire valve.

    View Instructable »
  • Small Greenhouse for Plantations on Euro Pallets

    A strong wind will eventually rip the plastic right through those staples.I would recommend sandwiching the plastic with extra wood strips so its held uniformly along its length.

    A strong wind will eventually rip the plastic right through those staples.I would recommend sandwiching the plastic with extra wood strips so its held uniformly along its length.

    View Instructable »
  • Cheap Scalable Arduino CNC (Plotter, Mill, 3D Printer...)

    My understanding is that this design doesn't scale well because as the pipes get longer, they bow under the weight of your tool. There is another project you can find that should be stabler called RootCNC (https://rootcnc.com/).

    View Instructable »
  • Eco Friendly Metal Detector - Arduino

    I love the design. I just have two questions about it.1) The description talks about eddy currents reducing the length of the time the field is sustained. The other possible cause would be the nature of the metal changing the inductance. If this was the case, I'd expect a ferromagnetic object to delay the fields collapse, and a non-ferromagnetic object (like copper or aluminum) to speed up the collapse. If it was eddy currents, you'd expect the both types of metals to have the same effect.2) the signal diodes across the transistors hooked up to the transmitting coils look curiously placed. My understanding of inductors is that when the field collapses, the energy reclaimed from the field drives electrons in the same direction as they were already going. In which case, I would have thoug...

    see more »

    I love the design. I just have two questions about it.1) The description talks about eddy currents reducing the length of the time the field is sustained. The other possible cause would be the nature of the metal changing the inductance. If this was the case, I'd expect a ferromagnetic object to delay the fields collapse, and a non-ferromagnetic object (like copper or aluminum) to speed up the collapse. If it was eddy currents, you'd expect the both types of metals to have the same effect.2) the signal diodes across the transistors hooked up to the transmitting coils look curiously placed. My understanding of inductors is that when the field collapses, the energy reclaimed from the field drives electrons in the same direction as they were already going. In which case, I would have thought the diodes should be across the transmitting coils, not the transistors. I would be interested to know if any current flows through the diodes in their current placement.

    a magnetic field can induce currents in any conductor.if that wasn't the case, generators with copper windings wouldn't produce power, nor would transformers work.

    View Instructable »
  • Up-cycle News Paper to Plant Pot to Grow Tomato

    For small seedlings, I used to do this. I now use transparent plastic cups with some little holes punched in the bottom. They don't sag and tear when they get wet, and you see if the seedling is becoming rootbound.

    View Instructable »
  • Getting Started with the ESP8266 ESP-12

    were you seeing the led flash when it powered up? My led isn't lighting up. I'll try flashing a program next.

    View Instructable »
  • ericCycles commented on Vulcaman's instructable DIY-SLS-3D-Printer1 year ago
    DIY-SLS-3D-Printer

    My understanding is that commercial units have heaters for the beds so that the printing material is raised up to temperature just below the melting point so that laser beam just has to put-it-over-the-edge. Ie, lets you use a lower powered laser for a particular material.

    View Instructable »