Hi:
I built the attached 0 to 9 digital counter. For now I left the 555 timer out. When I power up the circuit, it displays a "9". Is that
to be expected? When I momentarily apply +5 volts to pin 14 of the 74LS90, I expected the number on the display to change?
I should have used a 4026 and a common cathode display but I don't have any cmos devices at this point.
Please advise. Thanks.
I built the attached 0 to 9 digital counter. For now I left the 555 timer out. When I power up the circuit, it displays a "9". Is that
to be expected? When I momentarily apply +5 volts to pin 14 of the 74LS90, I expected the number on the display to change?
I should have used a 4026 and a common cathode display but I don't have any cmos devices at this point.
Please advise. Thanks.
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