Bill of Materials
Schematic
Quantity Name
Designator
Note
1
FTR-B4C
K1
FTR-B4CA4.5Z (non-latching)
1
TLP222G
U1
1
ATTINY13
U2
Requires programming. Pre-programmed if purchased
1
78L05
U4
1
100u
C3
Electrolytic
1
MMBT3904
Q1
Pre-soldered, SMD
1
SS14
D1
Pre-soldered, SMD
2
100n
C2,C1
Pre-soldered, SMD
1
10k
R1
Pre-soldered, SMD
1
2.2K
R2
Pre-soldered, SMD
J1
Connect J1 pads to enable pop-suppressing mute
1
Switch
SW
SPST normally open momentary switch
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