madmikejt12
New Member
Hi, i am trying to get a 7-seg LED display to count from 1-9 using a 555 timer and a 4026 decade counter/display driver, i have wired up the circuit and have tried various things (adding connections, moving connections etc) and got some slightly different results...
i got
-number 6 constantly on
-number 6 flashing on and off (with the pulse of 555 timer) when the 6 went off, the middle light (g) was on
-number 1, number 2 with g missing, back to front 3, 4 with g missing, 5 with a few missing and so on.
could it be because i am using a cathode LED display and not annode?
Thanks,
Mike
i got
-number 6 constantly on
-number 6 flashing on and off (with the pulse of 555 timer) when the 6 went off, the middle light (g) was on
-number 1, number 2 with g missing, back to front 3, 4 with g missing, 5 with a few missing and so on.
could it be because i am using a cathode LED display and not annode?
Thanks,
Mike