Posted by : AVINASH CHAKRAVARTHI Friday, 6 September 2013

some times ,u might have 9v battery and u need only 5v to run ur load.then this voltage regulators place a crucial role.
normally 78xx series ics are used to regulate the voltages
here is the list of voltage regulator ics
for an example:
take 7805ic
minimum i/p is 7.3v and o/p is 5v
for the voltage above 7.3 the o/p will be equal to 5v
for an i/p voltage lesser than 5v o/p will be equal to input.
google the datasheet of the ics ,before u use them in ur project**

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