14
Trouble loading data in a 4029 Up/Down counter (lemmy.world)
submitted 6 days ago by SebiTCR@lemmy.world to c/askelectronics@discuss.tchncs.de
4 comments fedilink hide all child comments

I have to design a programmable frequency/clock divider circuit using the 4029 IC. Theoretically, the circuit should start to count down backwards from a given number and when it reaches 0, the 4029 should load the data from the ABCD pins.

The issue is that the countdown stops at 0 and PE doesn't get back to the LOW state. It loads the number, but the SR latch never changes its state so the IC can start counting again. I tried everything and nothing fixes the issue. What can be done in this case? Thanks 🍻

you are viewing a single comment's thread
view the rest of the comments
[-] SebiTCR@lemmy.world 2 points 5 days ago

Seems like that was the issue. Thanks a lot for the help 🍻 :) I replaced the SR latch with a D Flip Flop and everything works perfect.

this post was submitted on 31 May 2026
14 points (93.8% liked)

Ask Electronics

4148 readers
1 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.

founded 3 years ago
MODERATORS
DavideAndrea@discuss.tchncs.de
linker3000@discuss.tchncs.de