R1 = 100K
R2 = 1K
R3 = 470R
R4 = 12K
R5 = 1K
R6 = 470R
Q1 = BC327
Q2 = BC337
D1 = 1N4007
D2 = 1N4007
D3 = 1N4007
D4 = 1N4007
D5 = P0102D (SCR)
C1 = 1KµF-25V
PL1 = Male Mains plug
SK1 = Female Mains socket