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The Best Rubik's Puzzles 2017

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If you’ve recently learnt how to solve the cube, and are in search of a similar, but more challenging puzzle, you’ve come to the right place. Here’s a short overview of the coolest puzzles available in market, 2017.
Lets Start with the classics.

1.The Evergreen Rubik's Cube Series-

THE 3x3


Needless to say, the 3x3 cube is where we all started. The original cube created by Erno Rubik, remains the most popular and experimented with, cube. Known for its simplicity, there are many ways of solving the 3x3. At present Mats Valk from Netherlands holds the world record for solving the cube in 5.55 seconds.

THE 4x4 and 5x5 and 2x2 cubes





By adding another layer of pieces, we have the 4x4 cube, where things get a bit harder to solve, having no centre pieces.
The 5x5 cube is purely a ‘collector’s edition’ cube created for dedicated puzzle solvers.


No matter who you are, you can solve the 2x2 cube without any prior experience!
While being able to solve the above cubes may characterise you as a genius, …

DIY Motion Activated Tremolo guitar pedal

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Hello Everyone!
Guitar pedals and music effects are very interesting to experiment with, so I decided to come up with something new and original. Using minimum possible components I made a circuit that simply breaks and rejoins the connection between the guitar and the amp. But thats not the catch,
This pedal can be controlled without coming in contact with the pedal. 
Weird, right?
The setup uses an ultrasonic sensor (Popularly, used for obstacle avoidance in robots) to calculate the distance from the pedal, and activate the effect accordingly. Also the closer you move towards the pedal, the more shallower the effect gets. 
Well, if I've got your attention and your head is bubbling with ideas,  here is , how I made it!-

Step 1- Watch the video-
https://www.youtube.com/watch?v=SwUfxQK5lw8

Step 2- Get the parts-
1. An Arduino ( Uno or Nano) ( a clone would also do the trick)
2. A single channel relay (an electro-mechanical switch)
3. (1/4 inch mono sockets) x2
4. Ultrasonic sensor module (HC S…