Component Symbol Type or Value Description
PCB - GC10PCB -
GM tube - SBM-20 “+ SBM-20” mark indicats anode
resister R1, R9 1k Ohm x 2
R2 330 Ohm x 1
R3 120 Ohm x 1
R4 1M Ohm x 1
R5, R7 4.7M Ohm x 2
R6 100k Ohm x 1
R8 47k Ohm x 1
capacitor C1, C3 0.1 uF 104
C2 33 uF electrolytic capacitor
C4, C5 4700 pF -
C6 100 pF 101
inductor L1 10 mH -
diode D1 UF4007 Fairchild
LED LED1 - 5mm LED
ＩＣ
IC1 L7805CV -
IC2 ATtiny4313 -
IC3 FQPF3N90 -
IC4 2SC1815Y -
switch S1, S2 - -
connector &
header
14 pin connector - PCB side
14 pin header - LCD side
etc LCD TC1602E-25 -
IC socket - -
Pin socket 5pin right angle -
Piezo buzzer PKM17EPP-4001-B0 -
GM tube holder - -
9V battery snap - -
LCD spacer - -
1. Parts list
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