Kiddies Toothbrush Timer
Gerber file
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Extra info / Update
Component list
Resistors
(SMD 0805)
R1 = 1kOhm 1%
R2 = 10kOhm 1%
R3,R4 = 75Ohm 1%
R5–
R16 = 120Ohm 1%
Capacitors
C1,C2,C3 = 100nF 25V, SMD 0805
Semiconductors
D1–D24 = LED, red, SMD 0805, e.g. Kingbright KPHCM-2012SURCK; Farnell # 1686067
D25 = LED, green, SMD 0805, e.g. Kingbright KPHCM-2012CGCK; Farnell # 1686075
IC1 = ATtiny13A-SSH, SO-8 case, programmed, Elektor # 120368-41
IC2,IC3 = 74HC164D, SOIC-14 case
T1 = BC850C, SOT-23 case
Miscellaneous
BT1 = button cell holder and CR2032 battery; Farnell # 2064725
BZ1 = piezo buzzer, Farnell # 1192551
K1 = 6-pin (2x3) pinheader, 0.1’’ lead pitch
S1 = pushbutton, side actuated, Farnell # 1761633
PCB # 120368-1
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