Hacked Gadgets Forum

December 31, 2011

Remote Control Solar Lawn Mower

at 12:53 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks



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 other robots electric wheelchair motors have been selected to drive this mower. The videos are great since it looks like Robert must have a video production background.

If you are looking for more robotic lawn mower inspiration be sure to check out some of the other robotic lawn mowing systems we have featured in the past.

Thanks for sending this in Robert!






December 30, 2011

DIY Auto turn-OFF featured cheap Digital Multimeter

at 12:59 pm. Filed under DIY Hacks, Electronic Hacks


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 and resistors. The circuit is powered from the multimeter 9V battery and cuts off the ground path to the meter to turn off its power.

The source code and Eagle based circuit schematics are accessible on github here. Also you can find the complete design steps at Florin’s post here


December 29, 2011

Bridgestone: Air-Free Tire Concept

at 7:38 am. Filed under Crazy Hacks, What Were They Thinking


Laughingsquid member  reported the new design concept of Air-Free Tire by Bridgestone. This Air-Free Tire is basically an airless tire design concept that relies on thermoplastic resin spokes to give the tire its shape and flexibility. This newly designed tire is 100% recyclable.

Currently the holders of lightweight carts and personal mobility devices can be benefited with this new launch and very soon this design concept will brought up for the larger vehicle holders too. More at Laughingsquid.

For advanced features of this new concept, watch the video below:  


December 28, 2011

DIY Home Automation – using Voice activated commands

at 3:31 pm. Filed under Crazy Hacks, DIY Hacks, Funny Hacks


Check out this wonderful project that you can use to automate your home using voice commands without spending big bucks. To build this, you will only require few popularly used components like:

  • a VRbot voice recognition module
  • an AVR ATtiny2313
  • a 433MHz RF send module
  • low-cost wireless light swiches (or relays)

 VRBot speech recognition module is basically the core of this project. It recognizes 32 custom voice commands.  Once a command is recognized, a wireless switch is activated via a radio receiver.

Via: Hacknmod

Watch out this video to learn more:




Pulse Sensor monitors Heart Beats and easily interfaces to an Arduino

at 1:24 pm. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks


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 heart rate. The Pulse Sensor team just finished a successful Kickstarter and are not moving full steam ahead with production.

“When blood is pumped through your body, it gets squeezed into the capillary tissues, and the volume of those tissues increases very slightly. Then, between heart beats, the volume decreases. The change in volume effects the amount of light that will transmit through. This fluctuation is very small, but we can sense it with electronics.”




December 27, 2011

Name the Thing Contest – 195

at 7:50 am. Filed under Contests


The prize this week is a jet lighter, just what you need when you are starting that campfire with damp wood. This contest will run for the rest of the year (December 27 – 31, 2011). Ending time is based on central standard time. To enter, identify the item above and what it can be used for.

Please do not give the answer in the comments.

Send an email to contest @ hackedgadgets.com with “Name the Thing Contest” as the subject, and the message body consisting of:

  • The name of the item in the above picture
  • An example of what the item pictured above can be used for

The winner will be chosen at random from all of the correct entries.


Added January 7, 2011

The item to guess was a Canon EF 50 1.8 II lens

The winner is Andrew C. (there were 132 entries)


Below is a picture of the prize.



Cost-effective replacement for CdS Light Sensor

at 5:58 am. Filed under Cool Gadgets, Electronic Hacks


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 to achieve the same performance as CdS or even more.

To learn how you can use LEDs for light sensing, you can visit Scott Daniels post at Provideyourown here.

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