A digital circuit that literally "counts" - it progresses through a sequence of states that are representative of some value. It need not count in a natural progression, i.e., 1,2,3,4,5, etc., to be considered a counter (you can have different count sequences). Sometime it's sufficient that the counter counts to some value and then stops. Examples are Gray code, up/down counter.
Questions tagged [counter]
605 questions
2
votes
1 answer
Timimg of 4060 counter-oscillator
I'm using a CD4060B counter/oscillator and need to know the internal timing of the RESET operation. TI's 4060B datasheet says that the minimum input reset pulse width is 30 ns at 10 V, and the reset propagation delay is 80 ns.
When calculating the…
RodB
- 99
- 9
2
votes
1 answer
Design of A Counter Circuit
I want to build a counter circuit which to count from from 0-7, during some pulseswidth. The problem I am having is that it has to do the whole count sequence during one PW and that is where I am struggling to come up with an idea
edit: just want…
user183215
2
votes
1 answer
Up/Down Counter Not Counting Down
I'm trying to build a 2 bit counter using JK flip flops. In the simulation it counts up just fine, but when I switch it to count down, it starts at 3 and then goes to zero and counts up again. The clock is connected to a 555 timer, just didnt show…
Deadshot
- 197
- 7
- 20
2
votes
1 answer
Use counter's output to reset itself
I have SN74HC4040 12 bit counter, however, I need only 10 bits and then reset it back to 0. Would it be reliable to use 11th bit as an input to the CLR (reset pin)? Basically, when the counter transitions from 1023 to 1024, the 11th bit becomes…
Nazar
- 3,172
- 4
- 36
- 64
1
vote
2 answers
74590 as 2-bit counter
I'm (ab)using a 74HC590 binary counter as a 2-bit counter. The storage register clock is directly connected to the counter clock. I'm feeding the inverted 4th bit (bit 3) of the counter into ~MRC (master reset).
This works in principle, but state 0…
HueChars
- 11
- 2
1
vote
0 answers
Designing a down counter using Xilinx ISE design
We are trying to design a circuit that counts down from 9.99 to 0.00. Could you give us some tips?
electro
- 11
- 2
1
vote
1 answer
Can't get 74LS590 to work
I'm currently trying to count the pulses from a 555 timer. I've opted to use a 74LS590 (8-bit binary counter with output register; 3-state).
However, I can't get the counter to count anything. I've checked on the datasheet and I think I wired…
David Kolar
- 13
- 4
1
vote
1 answer
Push button counter from 0-999, but increment in 1, 4 and 6
I would like to create a push-button counter from 0-999 using 'BCD Decade Counter' and a 'BCD to 7 segment Decoder/Driver' the total of button presses will be displayed on 3 x 7 segment displays (similar to…
jockster
- 11
- 1
1
vote
1 answer
Which edges does this counter count?
This board has two counter inputs.
But is there a way to figure out whether the counter counts each rising or falling edges? Rising or falling edges?
floppy380
- 1,845
- 7
- 38
- 74
1
vote
2 answers
3 bit up/down counter using 2 flip flops
Can I build a 3 bit modulo 7 counter using 2 flip flops ?, I'm thinking of using the clock as the third bit since it toggles from 1 to 0. Will that work ?
edit:
Found this circuit which uses two jk flip flops but counts down
Link, Circuit
Would it…
Deadshot
- 197
- 7
- 20
1
vote
2 answers
Difference between these counters 74LS196 and 74LS197
Components data sheet can be confusing sometimes
Can anyone explain to me the difference between these counters 74LS196 and 74LS197 ?
can they replace each other? can the 74LS197 perform better in the place of 74LS196 in case if they do replace each…
Mos
- 27
- 3
1
vote
1 answer
Binary counter (SN74LV8154) jumps (internal bits seems to flip)
I am using a "Dual 16-bit binary counter with 3-state output registers" (SN74LV8154) to count input pulses up to 32 bits.
It is working fine most of the time, but some of the bits in the counter seem to flip randomly. The result is reflected in the…
Julien Vivenot
- 123
- 5
1
vote
1 answer
How to Modify the Bidirectional Visitor Counter Circuit?
I have recently seen the circuit diagram of an interesting concept in the page - Bidirectional Visitor Counter using Microcontroller.
I am planning to do this project circuit on next week with few modifications. If we arrange this circuit to a…
user3580208
- 99
- 1
- 2
- 9
0
votes
1 answer
Where to put the unused states in synchronous counter that counts Even numbers?
Suppose if we have a counter that counts only Even numbers and the unused states(odd numbers) treated as don't-care condition.
Current state Next State
A B C D A B C D
0 0 0 0 0 0 1 0
0 0 1 0 …
Azad
- 103
- 1
- 5
0
votes
1 answer
4017 IC with tri-state output
I am looking for an IC whose functionalities would be same as 4017 IC's (that is a ring counter),but in addition to that I want a TRI-STATE output like mechanism (of course on the same chip) which will ensure if we give clock pulse, internally the…
Sayan
- 739
- 8
- 18