Q1..Q3 - BC547
D1, D3, D4 - 1N4148 or KD522
D2 - LED 3mm, red
ZD1 - Zener diode BZX55/C5V6
R1..R3 - 10k
R4 - 1k
R5 - 2k2
R6 - 4k7
C1, C2 - 100nF
BU5 - Straight pin-header 2 x16, division 2.54
Jp8 - Straight pin-header, division 2.54, 1x3 / Jumper, division 2.54mm

Optional:
Surface Mount 0.5mm TSOP-40 Socket Meritec 980020-40-01
Solder chip on adapter contactpads or apply socket.