Connor Nishijima has devised a neat trick to give the standard Arduino Tone() function 256 smooth volume levels using PWM at an ultrasonic frequency, without any extra components. This allows for programmatic control of square waves with nothing other than a speaker connected to an Arduino Uno.
Instructables user deba168 is an electrical engineer based in India. He posted a tutorial to solve a common problem in his country: In India most of the people are living in rural area where national grid transmission line is not reached till now.The existing electric grids are not capable of supplying the electricity need to […]
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