EAGLE Electronics
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Counter Circuit | Digital Counter
PART LISTS
CMOS ICs
(must check ic's data sheet from projects page)
IC1 =
CD4093 quad 2-input NAND schmitt trigger
IC2 , IC3 =
CD4518 dual BCD up counter
IC4 TO IC7=
CD4511 BCD to seven-segment latch decoder-driver
DISPLAY
DIS 1 TO DIS 4 ===
FND500 or TIL315 seven-segment
common cathode display
TRANSISTORS
T1 ==
2N5777 or TEK5154 or SPT100
phototransistor
T2==
BC109 npn transistor
RESISTORS
R1 ==
2.2 kilo ohm
R2==
220 kilo ohm
R3 , R4 , R5====
1 kilo ohm
R5 to R32 ====
560 ohm
MISCELLANEOUS
S1===
SPDT micro switch
L1===
6.3V , 60mA lamp
others
9-Volt power supply , IC socket.
PCB , ribbon cable , enclosure etc.
CIRCUIT DIAGRAM