Speed Measurement System
A DIY Gatsometer with infra-red light barriers
Materials
Gerber file
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Component list
R1,R2 = 4kOhm 7
R3 = 10kOhm
R4,R5 = 100kOhm
P1 = 10kOhm preset
Capacitors:
C1 = 10µF 16V
C2-C5 = 100nF
C6,C7 = 15pF
Semiconductors:
IC2 = 7805
IC3 = 87LPC762, programmed, Publishers' order code 010206-41
Miscellaneous:
K1 = 9-way sub-D socket (female), angled pins, PCB mount
K2 = 14-way SIL pinheader
S1-S4 = pushbutton
S5 = on/off switch
X1 = 6MHz quartz crystal
LCD dot matrix display, 1x16 characters, 44780-compatible with connections in top left hand corner
2 combinations of IR-Sender PIE-310 and IR receiver PID-310 (Kodenshi, Farnell #139-865)
4 module connecting cables, Farnell #310-0728
PCB, Publishers' order code 010206-1
Disk, contains source code and Hex files, Publishers' order code 010206-11 or free download
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