PWM based LED dimmer circuit using IC 555

PWM LED light dimmer circuit
PWM ( Pulse Width Modulation) is a modulation technique in which the width of the pulse is varied based on the modulating signal. This possess wide variety of applications including motor speed control which is the most famous application of the PWM. This circuit uses IC 555 to generate PWM  which is employed to dim the LED's connected to the IC.

Solar powered garden lights circuit

Solar powered garden lights
Solar power attained a great significance after increase in energy demand in our daily life. To conserve power we need to utilize all the natural sources we can to extract power. This forces us to use solar energy to power the lights and other appliances in many places. This circuit tutorial will teach you to build a Simple Solar powered garden LED lights. 

What is RTOS and How it differs from General OS?

Everyone must have been familiar with the term OS (Operating Systems) as we use it in our PC's, laptops, mobile etc. But what does a RTOS means? Whats so special about it? What are its applications? Wait up, this article focuses on answering these three major questions and illusrrates the importance of RTOS.