- #1
healing1000
- 7
- 0
Hello our doctor gave us a project to design a power supply which looks like this
http://i541.photobucket.com/albums/gg395/healing1000/powersupply.jpg
however at the voltage regulator part (78xx and 79xx) there are 2 capacitors (the 2 on the right) which I don't know how to find their values
he asked us to make the power supply in a way that the ripple voltage is 0.01 and the voltage outputs are
+5 +9 -5 -9
so i will get 4 voltage regulators but how do i find out the values of those 2 capacitors on the right? he told us the 2 capacitors share the same value and we have to look them up and i tried googling and couldn't find out anything helpful so i came here in hope u guys can help me
if the drawing isn't clear here is a similar voltage regulator i found online
http://images.elektroda.net/24_1309423266.jpg
note: i know we are supposed to show our work but i really tried searching and couldn't find out how to figure the capacitors values help please
http://i541.photobucket.com/albums/gg395/healing1000/powersupply.jpg
however at the voltage regulator part (78xx and 79xx) there are 2 capacitors (the 2 on the right) which I don't know how to find their values
he asked us to make the power supply in a way that the ripple voltage is 0.01 and the voltage outputs are
+5 +9 -5 -9
so i will get 4 voltage regulators but how do i find out the values of those 2 capacitors on the right? he told us the 2 capacitors share the same value and we have to look them up and i tried googling and couldn't find out anything helpful so i came here in hope u guys can help me
if the drawing isn't clear here is a similar voltage regulator i found online
http://images.elektroda.net/24_1309423266.jpg
note: i know we are supposed to show our work but i really tried searching and couldn't find out how to figure the capacitors values help please
Last edited by a moderator: