Ugh... that diagram sets off my million OCD-ish pet peeves all in one... The transformer is X1 (not T1), the transistors are T (not Q), labeling is inconsistent (they say "D1-D3 = 1N4007" at the bottom, do not label D1 and D2 individually, but do label D3), the LEDs are "LED" (not just D), IC not U, everything but the voltmeter has a reference, every LED is labelled differently (two are labeled by color, one by purpose, two are white on black, one is black on white), the bicolor LED symbol looks like a TVS diode with funny marks above it, there is a heat sink but they do not say what kind, "O/P" is a stupid abbreviation for "output" when they could just write "output", C3 and C4 have messed-up symbols, a pinout is given for BC548 but not SK100, blah blah blah... Not to mention the design problems: SK100 is only rated for 500mA yet they fused it at 1A, they fused a power supply at 1A (seriously, it would be so easy to accidentally blow that fuse), it appears to have no overcurrent protection - just a damn buzzer - but a crude overcurrent circuit would be just as easy to implement as the buzzer, they appear to do nothing to compensate for the voltage lost in D3 and T2, they are using a crapload of individual voltage regulators when they could have just used one adjustable reg and switchable set resistors, etc... In Dave's voice: "WHY?!"
Sorry, I'm feeling picky today.
Edit: Oh, and the biggest WTF: they take a 18VAC-output transformer through a rectifier straight to the output labelled "18V". Um... that's not 18V. That's 25V nominal (well, actually about 22-23V with the couple of diode drops and T2), subject to mains variation and some pretty nasty ripple under load.