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A simple electric motor homemade, easy to make. 1. 1 meter of wire 2. magnet 3. one battery AA or AAA 4. Improvisation

A simple and efficient PWM lamp dimmer using timer IC NE555 is discussed in this article. Yesterdays linear regulator based dimmers can only attain a maximum efficiency  of 50% and are far inferior when compared to the PWM based dimmers which can hit well over 90% efficiency. Since less amount of power is wasted as heat, the switching elements of PWM dimmers require a smaller heat sink and this saves a lot of size and weight. In simple words, the most outstanding features of the PWM based lamp dimmers are high efficiency and low physical size. The circuit diagram of a 12V PWM lamp dimmer is shown below. We recommend 3 very good books to learn the basics and applications of the 555 timer IC. These books have been thoroughly reviewed and they can be purchased by clicking on this link:- 3 Great Books to Learn 555 Timer Circuits and Projects Fig 1 : PWM lamp dimmer using NE555 As you can see, NE555 timer IC which is wired as an astable multivibrator operating at 2.8KHz forms the heart ...

This article describes a way to create an AVR perform multiple tasks. Beginners who want to urge an in-depth information in AVR assemble language programming will seek this project. The assembly language helps to utilize all the functions and capabilities of the processor. browse on to grasp a lot of. The most vital and major functionality of an operating system is performing multiple tasks on the CPU. what's being done here is time sharing multitasking which too on an AVR. An Atmega32 is ready up to perform Round-Robin Multitasking. Quasi-parallel execution of multiple tasks is feasible through Round-Robin Multitasking. The tasks are time-sliced and don't seem to be tired parallel. The project demonstrates how the switching mechanism is finished between seven individual tasks. The RAM is split between the amount of processes that are running. A timer is employed here and a trigger is executed when it reaches a compare worth. the required registers are pushed onto the stack. No...

This  is a very simple power supply and most popular to use. Because this circuit is simple and easy to make. Component required is Transformer ( CT transformer ) with output secondary 12 Volt, 4 diode , 2 Condensator Electrolit , Only this component you can make this power supply. See Power Supply Schematic below :   How it works ? In the first , voltage from AC 220V or 110V entered to the transformer and will be lowered into 12V AC . And then AC voltage will  be rectified by 4 diode or you can use bridge diode to the DC voltage. And the DC voltage output will be  filtered by Condesator electrolit and the voltage output ready to use . Its DC voltage with triple voltage (+) , (-) , and ground.