This Candle Powered Fan uses some small candles to heat one side of a TEC-module, this creates a voltage that will operate the fan. A CPU heatsink is used on the hot and cold side of the module and the result is enough power to spin a small DC fan. “Components used: • CPU-cooler (cold side): Zalman CNPS5X (Base plate: 33x33mm) • CPU-cooler (hot side): From an old PC
The Time Plotting Clock mechanism is fantastically simple, 3 tiny servo motors allow the erasable marker to be moved along the drawing surface and raised when no contact with the surface is desired. This allows the pen to write the time. There is also a tiny eraser located in the upper right corner, when the next minute is ready to be drawn the pen grabs the marker and erases
When Oliver Krohn isn’t using an Arduino to control the temperature climate chambers he is soldering SMD parts on hot sand! I guess the skillet and toaster oven is not cool anymore. 🙂 He is using a bunsen burner to heat the sand but anything would work as long as you can get the correct temperature. Might be a little hard trying to follow the reflow curve of some
When you walk through the garden section of your home store in the summer you will see a bunch of misters spraying the plants every now and then to keep them moist. Johnny Klaus has built a system that will mist his plants using an Arduino that is pumping a spray bottle using a 12 volt door lock motor. I think this system could also be used to keep
  Air Hockey is a fun game, fast paced and can be very challenging with a seasoned opponent. What happens when you build a robot that can move faster than you and calculate where the puck will travel? A robot that is tough to beat! Via: Hack a Day “One of the main problems I’ve had is that the power of the NEMA17 motors are pretty fair for this
If you are waiting for some electronic parts to be delivered the wait can be agony. It is especially painful when you learn your parts which you desperately need have been sitting in your mailbox for most of the day because the mailman came early… This problem is solved by this Mailbox Wireless Alert Project. Re-purposing an off the shelf inexpensive wireless alarm system is all you need. The
Another great video showing the Lenz’s Law at work. We have seen this demonstrated before but the effect never gets old. Via: Adafruit
