The proposed unit is designed for AC power small electronic devices (handheld radios, tape recorders, watches, etc.). The output voltage can be selected within the range of 5 to 12 V. One of the advantages of unit – small size: all its parts are placed in the body … mains plug.
Parts list : R1 : 62 Ω R2 : 220K R3 : 300K R4 : 1K3 R5 : 470Ω R6,R7 : 220Ω R8 : 470Ω R9 : 100K C1 : 10uF/160V C2 : 470uF/16V C3 : 0.33uF VD1 : KU407A VD2,VD3 : KD522A VD4 : KC191 VT1 : KT940A VT2 : KT3130A VT3,VT4,VT5 : KT940A DA1 : 78L05
More details : cxem.net/pitanie/5-19.php
