Abstract : The output of filter is not constant output voltage it will varies according to changes in input but we want constant output voltage. For this purpose we are using voltage regulator.

Regulator is defined as it is a device which will maintain constant output irrespective of changes in input.

•The most popular regulator series is 78xx series. This series have more advantages.

•We are using 7805 voltage regulator to maintain constant 5v output voltage irrespective of changes in input voltage.

Please find the following attachments"Regulated power supply pdf/ppt download" here..........