Questions tagged [counter]
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.
634 questions
1 vote
1 answer
131 views
74HC192 BCD decade up/down counter doesn't count UP
I'm trying to simulate a circuit with a 74192 counter and I don't understand why it stops counting up after counting down at least once. This is the circuit I'm simulating. The problem is: up ...
- 11
5 votes
8 answers
1k views
How to design a circuit that outputs the binary position of the 3rd set bit from the right in an 8-bit input?
I was asked to design a digital system that receives an 8-bit binary input and outputs the binary position of the third '1' bit from the right (LSB side). The output should be a 3-bit binary number ...
1 vote
1 answer
293 views
Controlling 7-Segment Display
I am redesigning the control panel for a project I have been working on. I am using a rotary encoder to replace a set of 3 rotary dials, but I cannot use any microcontrollers or programming. I plan on ...
- 305
-1 votes
1 answer
100 views
Bidirectional synchronous modulo‑16 counter using two modulo‑8 counters – confused about direction control
I want to design a bidirectional synchronous mod‑16 counter using two mod‑8 counters, with synchronous reset and direction control. I began with a straightforward bidirectional mod‑16 counter and its ...
- 193
0 votes
2 answers
95 views
What is this counter mode usually called and how can I set it up in STM32CubeIDE?
Please consider the sketch below. In this sketch, the grey bars represent the clock of a hardware counter/timer of a microcontroller. The blue trace is an asynchronous signal applied to a pin of the ...
- 25.5k
1 vote
1 answer
131 views
Why does my synchronous mod-19 counter goes to (2,2) -> (2,3) -> (0,2) while the asynchronous version resets cleanly?
I'm designing a mod-19 counter in Logisim using two 3-bit (mod-8) counters: Counter A – low-order bits (0…7) Counter B – high-order bits (0…2) 1 Asynchronous version (works) Clock drives A directly. ...
- 1
0 votes
2 answers
188 views
Logic.ly — why is my cascaded JK counter (/15 → /5) stuck? Clock net shows solid red
I’m using the Logic.ly online demo (first time) to build a synchronous ÷ 75 counter. Plan: Block A – four JK flip-flops wired as a /16, but I clear it asynchronously on ...
- 1
1 vote
0 answers
100 views
How do I change my 4-bit down-counter from counting 9→3 to counting 14→0 (mod-15)?
As the title says, I have been really struggling, with converting my current 4-bit counter that counts down -1 from numbers 9-3 to switch to 14-0, it is meant to be a synchronous and parallel, meaning ...
- 19
1 vote
1 answer
132 views
LOGO! Soft Comfort Mathematic Instruction Block Isn't Using Live Data From Counter
I'm working with LOGO! Soft Comfort version V8.4.1 and encountering an issue in simulation mode where a Mathematic Instruction block (B002) isn't using the live, updated value from an Up/Down Counter (...
- 19
2 votes
3 answers
355 views
Delta-Sigma output from microcontroller hardware timers?
Recently, I am using more and more microcontrollers for simple projects and one thing that has struck me as odd is that the hardware timers available on microcontrollers allow easy fixed-frequency PWM ...
- 25.5k
2 votes
2 answers
247 views
I’m looking to source or create a digital up/down counter with scalability
I’m building a project that requires a battery powered up/down counter to measure distances/length of line coming off a spool, and re measure it on rewinding back onto spool. but the spool diameter is ...
- 23
0 votes
0 answers
90 views
Converting 1-of-10 Counter Output to Single Pulses
I have a digital clock connected to an MM74C915 7 segment to BCD encoder, which goes into a 74LS42 BCD to 1 of 10 decoder. (Think like a CD4017 but BCD) Need to somehow convert the 1 of 10 output into ...
4 votes
6 answers
456 views
7-segment numeric counter that only displays numbers 1-8
Please help me with designing a counting circuit which goes 1 to 8 in a loop. using 4000-series IC’s (because that’s what I have on hand). It will have a 7-segment led numeric display (Preferably ...
2 votes
3 answers
151 views
Random increment on button press for a counter using CD4029 and 555 timer
It works well in Proteus (Simulation), but when I implement it, it doesn't work. I'm sure that the hardware connections are correct. Also, the 7-segment doesn't display, for example, the number 2 ...
0 votes
0 answers
82 views
I'm trying to build a counter system (easy one), but the circuit doesn't work
I'm using Proteus to test a circuit before implementing it practically, but it doesn't work. I'm supposed to build a counter that is displayed in a 7 segment display, using a 555 timer. The counter is ...