HI everyone, this is my first post so i am expecting a lot from this forum (basically also my first time asking for help on a forum).
I am given a project to design a dc power supply with
1. centre-tape transformer (220-V AC to 24*2 V AC).
2. LM-317 ic.
I can't use any transistors or any other ic's, so can anyone give me some ideas on how to do it?
my design works from 1.25-30 volts DC. But i couldn't understand how to drop those 1.25 to 0. since Vout=1.25*(1+R2/R1).
I am given a project to design a dc power supply with
1. centre-tape transformer (220-V AC to 24*2 V AC).
2. LM-317 ic.
I can't use any transistors or any other ic's, so can anyone give me some ideas on how to do it?
my design works from 1.25-30 volts DC. But i couldn't understand how to drop those 1.25 to 0. since Vout=1.25*(1+R2/R1).