 Robert Smith built this Remote Control Solar Lawn Mower to let him cut his grass without breaking a sweat. Check out a few of the many videos below that he created going over the entire build process. He used Google Sketchup to make a 3D model of the system before it was built, this would allow you to make your own lawnmower if you choose. Just like with
Youritronics member Florin brings you a wonderful design that enables you to add an Auto-OFF feature for 15 mins in your old and cheap digital multimeter(DMM). With this you can save your battery consumption even if you forgot to turn-OFF your DMM. To add the Turn-OFF feature, you will be requiring a very few components like – microcontroller (tiny25 in the present case), a voltage regulator, a npn transistor and the associated capacitors
Check out this Pulse Sensor which monitors Heart Beats and easily interfaces to an Arduino. This could be used for lots of creative applications. Think of cool clothing that blinks to your heart beat. It would be neat for fitness instructors to be able to look at the ear lobe of their students to determine their approximate heart rate and if the exercise plan should be altered to optimize
CdS (Cadmium Sulfide) photo-resistors are fairly cheap and widely used light detectors. Since CdS cells contains Cadmium, a toxic heavy metal, has now become hard to find. The reason is because of the RoHS directive. Electronics-lab has reported an excellent alternative for CdS that is more versatile and cost-effective. The idea is that when you are building a micro-controller based circuit such as a PIC or Arduino, then you can use a simple LED
GelSight, a new 3D surface sensing material can be used to visualize and measure surfaces. Zedomax member reports that GelSight is a pretty top-notch stuff that can detail at even microscopic levels. “The optical property of the material is making it very complicated to see the surface structureâ€, said Johnson, co-founder of GelSight, Inc. For more information, you can read the paper presented at SIGGRAPH 2011 named: “Microgeometry Capture using
Check out the super macro video of this Tiny Bi-Polar Stepper Motor being controlled with an Arduino. This great part was scavenged from a blu-ray player. This cute little motor has only 20 steps per revolution which is much less than the number of steps you would find in the large style steppers. I can normally think of a bunch of project ideas from every bit of electronics I
Instructables member Dimovi shares a wonderful hack where you can turn your old LCD monitor into a privacy monitor! The crazy thing with this privacy monitor is that it  looks all white to everybody except you, because you are wearing “magic” glasses! People might think you are crazy, staring at a blank white screen wearing sunglasses! But I guess that makes it even more fun! Materials required for this build are: An
