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Ever wonder how does a crystal oscillator work? Check this 41-min video from Craig on the operational theory of crystal oscillators, and designing a discrete Pierce crystal oscillator suitable for use as a local oscillator in an HF receiver.
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In his 2-part Youtube videos (Part 1 and Part 2), Scullcom describes in detail how to build a basic function generator with frequency up to 30KHz using XR2206 chip. He uses an Arduino Nano for controlling and display purpose. The output frequency is displayed on seven segment LEDs. via [Hackaday]
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Jean-François Duval’s entry to 2015 Hackaday Prize is FlexSEA, a wearable robotics toolkit. The human body is an incredibly efficient machine, the result of millions of years of optimization via evolution and natural selection. Improving on that is hard, really hard, but sometimes, we have no choice but to replace biological limbs with artificial ones. Every year, 185,000 Americans get an amputation and the large majority of them will end up in a wheelchair, or with a passive or quasi-passive artificial limb that is only slightly better than a peg leg. Can’t we do better? What about that revolutionary design
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Andrew Hannay has posted this great Instructable about his DIY Game and Watch video game console using the PIC18F4550 microcontroller and Nokia 5110 graphical LCD display. He writes, Back in the 80s when I was a kid, My parents bought me a Game and Watch game called Vermin. It was actually a TimeOut Exterminator. It was a really simple game with just left and right controls and the idea was to hit moles that were emerging from the ground. The screen consisted of pre drawn monochrome lcd images that were turned on and off when they were needed to be displayed.
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I found this nice series of lessons on Python and Arduino interaction. These lessons cover topics ranging from installation of Python and Arduino libraries to connecting sensors and wireless communication.
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