Shutter Time Meter
Accurate to 10 µs
Materials
Gerber file
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Component list
R1 = 1k
R2 = 47k
R3 = 470k
R4 = 1M5
R5,R6,R10,R12 = 4k7
R7 = 10
R8 = 10M
R9 = 270k
R11 = 10k
R13-R20 = 68
Capacitors:
C1 = 100µF 25V radial
C2,C3 = 10pF
C4,C5,C6 = 100nF
C7 = 220µF 16V radial
C8,C9 = 10µF 63V radial
Semiconductors:
D1 = HSDL-5420 (Agilent) (Farnell)
D2 = 1N4004
T1 = BC557B
T2 = BC547B
T3 = BS170
IC1 = ICM7217AIPI (Maxim) (Digi-Key)
IC2 = 74HC4518
IC3 = 74HCU04
IC4 = 7805
Miscellaneous:
S1 = rotary switch, 6 positions, 2 poles
S2 = 6mm pushbutton, 1 make contact
LD1-LD4 = LTS-4301E (LiteOn) (Digi-Key: LTS4301-B, JR, JS, JF) common cathode 12.9 x 9.7 mm, 10-pin device
X1 = 100kHz quartz crystal
PCB, ref. 050199-1 from The PCBShop
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