i am using 7805 and 7912 for 5 and 12 volts in the circuit. now i need -5 and -12 volts. for that i am planning to use the 7912 and 7905. but i could not figure out how to connect it in my existing circuit. i am using the a adopter to have 12VDC from main supply which goes in 7812 for 12 volts and then in 7805 for 5 volts. should i attach these chips in the same way to the outpur coming from adapter.


Shahzad