A simple power supply can be made with a component called a "3- pin regulator or 3-terminal regulator" It will provide a very low ripple output (about 4mV to 10mV provided electrolytic are on the input and output. The diagram above shows how to connect a regulator to create a power supply.
The 7805 regulators can handle 100mA, 500mA and 1 amp, and produce an output of 5v, as shown. These regulators are called linear regulators and drop about 4v across them - minimum. If the current flow is 1 amp, 4watts of heat must be dissipated via a large heatsink. If the output is 5v and input 12v, 7volts will be dropped across the regulator and 7watts must be dissipated.
All the component it is used are can be get at local market simply. No any parts are used can not find rarely. All are very common electronic component. I have posted above two paragraph description from ebook I download free from search on internet. It describes very well and so that I pasted it to my post to understand you simple.
Source : From Ebook On my Computer
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