Hello everyone.
I have intention to build a Digital Clock.
I want to reduce the number of ICs on breadboard to the minimum.
My first thought was to use 4026 counters because they have the BCD decoder integrated, but they count from 0 to 9 and I didn't find a way to reset them when count reaches 3, or 5 (if you know any method for resetting please tell me).
Second thought, to use 6 x 74LS193 (or 4510) counters plus 6 x 74LS47 (or 4511) BCD to 7-Segment Display Decoders plus 4 x AND gates for resetting 4 counters. That's a huge number of ICs so I don't want to use that option.
I also read that the NE555 is not very stable when it's used for large timing intervals, e.g. 1 minute or larger.
So I thought it might be wise to remove the "seconds" from my circuit and use a LM555 as a timer providing 1 minute clock (F = 0,0167Hz). But I would still have 4 counters and 4 BCD decoders. So I don't know how to reduce more this number of ICs.
I also don't want to use microcontrollers such as PIC or Arduino or others...
What would you suggest me?
Thanks,
Robert
I have intention to build a Digital Clock.
I want to reduce the number of ICs on breadboard to the minimum.
My first thought was to use 4026 counters because they have the BCD decoder integrated, but they count from 0 to 9 and I didn't find a way to reset them when count reaches 3, or 5 (if you know any method for resetting please tell me).
Second thought, to use 6 x 74LS193 (or 4510) counters plus 6 x 74LS47 (or 4511) BCD to 7-Segment Display Decoders plus 4 x AND gates for resetting 4 counters. That's a huge number of ICs so I don't want to use that option.
I also read that the NE555 is not very stable when it's used for large timing intervals, e.g. 1 minute or larger.
So I thought it might be wise to remove the "seconds" from my circuit and use a LM555 as a timer providing 1 minute clock (F = 0,0167Hz). But I would still have 4 counters and 4 BCD decoders. So I don't know how to reduce more this number of ICs.
I also don't want to use microcontrollers such as PIC or Arduino or others...
What would you suggest me?
Thanks,
Robert