We featured FastMHz’s fantastic rocket that was launched using an EM coil. Lots of people have been asking him how to make one. This is a video that documents the steps required so that you too can have a cool EM rocket launcher!
After seeing the post about the giant MP3-Player LED display panel Dave left a comment about this one. Thanks Dave. “Construction uses 1.6mm diameter tinned copper wire for the ground and +5V connections to the modules (ground connections run horizontally and vertically, +5V connections run horizontally). The vertical ground connections up the vertical leg of the T are 12 1.6mm diameter tinned copper wires. The horizontal power connectors are connected
The guys over at Hacker’s Bench have stumbled on a heat sink that could possible be used for this system… “The device is actually three heatsinks with 2 gigantic diodes between them making a half-wave bridge. There are no part numbers or clues on the assembly that I could find on the web, but I did look up the part numbers on the diodes (SW14CXC14C). Now, I’ve used a lot
This is a simple circuit that can easily be perfboarded. With just a handful of components you can monitor the water content of your plants soil. The picture is of the new version, have a look at the old version also. “Circuit Operation: 1) When the soil is very dry, the LED flashes brightly, since the soils resistance is very high. 2) When the soil has been watered a few
I think I am going to enjoy the world of the future, I will have a gadget for every task. Check out this automatic lawnmower. ” * Get your lawn cut automatically * No need to collect the clippings * Very quiet, virtually silent * No gas, no oil, no emissions * User friendly * Exclusive safety features * Designed for domestic lawns of any size Friendly Robotics® is focused
Not sure if this Nokia concept cell phone will ever be for sale, if it does I will be first in line for it. 🙂 See Sc iFi Tech for more details. “The “Nokia Open” is/would be a cell phone that opens like a fan with a “scrollable touch screen,” which seems to be an essential-yet-nonexistent item that would need to be invented in order for this to work. The
If you are looking to sniff for RFID information, this is the project for you! “In this study we show that the modeling predictions are quite accurate. We show how to build a portable, extended-range RFID skimmer, using only electronics hobbyist supplies and tools. Our skimmer is able to read ISO-14443 tags from a distance of $25cm, uses a lightweight 40cm-diameter copper-tube antenna, is powered by a 12V battery–and requires
