Dear members of All About Circuits, in a question I need to "Design a linear power supply consisting of a transformer, bridge rectifier and smoothing circuit, for use in the UK, to provide a + 15 V output for a load drawing 2500 mA. The ripple voltage should be set at 5 %." This is what I have done so far. 1) Vp - (2*0.7)=15V -> Vp = 15 + 1.4 = 16.4 2) Determine the transformer Vp=16.4, hence Vrms=16.4/(√2)=11.6Vrms Turns ratio=n:1= 230Vrms/11.16Vrms ≈ 20 turns ratio 3)Value of the ripple voltage= 5% of 15V = 0.75Vr 4) Determine the frequency UK Mains = 50Hz, ripple frequency = 100Hz 5) To Find C= (Iload)/(2f Vr)= 2.5A/(2*50*0.75)=33mF Is this enough? Which figure shall I report as the VA rating? Do all these components make the power supply linear? I hope that someone can help me. Thanks in advance! All the best!