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 (i.e. you can have different count sequences) each count value need not be of significance to other circuits (i.e. sometime it's sufficient that the counter counts to some value and then stops). Examples are Gray code, up/down counter.

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26 views

4 bit synchronous counter circuit that counts from 1 to 6

I'm having trouble answering this question, it is for my laboratory. My online lab sessions only discussed how to answer it briefly. I am not sure how to go from here, I've filled in the K-map with ...
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SN74LS93N is not counting as expected

I've got SN74LS93N chip that I am trying to get to work. I connected it as per datasheet but instead of counting, all outputs are flashing with clock signal... Video to circuit I read online and ...
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How does one get ticks of a clock from an atomic clock's microwave signal?

I understand that in an atomic clock there is a microwave signal that is locked to the frequency of the atomic rotation. However, if one wants to extract time ticks from the microwave signal (shown ...
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Verilog code “always @” block not working as expected

My Verilog code samples the input (Vin) at fixed intervals using a counter. The counter is a 2-bit register whose value increments at every positive edge of a clock ...
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1answer
47 views

Clearing 4-bit asynchronus counter using T flip-flops doesn't work

I am trying to make a BCD ripple counter that count from 0 to 9 , and I have watched a tutorial on YouTube , I implemented BCD counter as the instructor explained and after the counter reaches the ...
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1answer
34 views

Verilog: Counter is not working

I have just started learning Verilog, so I tried writing a simple 4-bit binary counter. However, when I run the behavioural simulation, the output stays undetermined. I will really appreciate if ...
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Poor low frequency response of CD4060 IC

I have a question that involves a CD4060 ripple counter. My project is to design a counting circuit that turns off a relay after two hours. This can be done simply using an Arduino, but no ...
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75 views

EEPROM with counter [closed]

I want to have and EEPROM with the address connected to a counter. For my purposes, this(https://eater.net/datasheets/28c256.pdf) EEPROM will suffice. However, I need a counter to go along with it. I ...
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Signal modulation at 38kHz using a 16-1 mux w/ 4bit counter

A little back story to what I am trying to achieve: I want to be able to control the bit pattern using DIP switches to send a controlled IR signal at 38kHz. I want to create a "game" where each IR ...
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26 views

Implementing a counter using multisim

There was an assignment as follows: implement a counter which gets as an input of 8 pulses, 5 volts each, with frequency of 40K Hz, without using counter block, or any IC components. In the output ...
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1answer
108 views

Is this a good design for a 0…7 counter?

My daughter's electronics teacher recommends to realize a counter from 0...7 as follows: It shall give an output pulse (for a subsequent circuit) when the button is hit the 8-th time. For me this ...
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Produce a clock out (5 MHz) with a counter and a clock in (50 MHz)

I'm trying to solve previous years' tests in logic design and there's this question that I can't really solve.. So, it gives me an 8-bit counter and a clock in (clk_in) of 50 MHz and it asks to ...
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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 ...
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How do I get to a counter stops at five using logic gates?

I need a circuit to recieve the signal called "50" or "20s" and it trigger a single pulse with five seconds called "TRIP". I set up the circuit below, however, by keeping input J HIGH of the FF7473, ...
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Unpowered clock divider

I am not a professional in this area, so I hope I am asking questions correctly. I have a 5V clock pulse with 50-200Hz (square wave) and would like to build a simple unpowered clock divider. Output ...
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Designing a counter up using JK flip flop (odd numbers)

I'm designing a simple JK flip flop counter up with this pattern: 0-1-3-5-7-9-0. I already a did a multisim and it works fine. But when I change the JK FF to real IC (7473), it won't work. What is ...
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Counter Circuit starts from wrong number in Logisim

I'm trying to design a synchronous counter using J-K, T and D flip flop. It should count as "1, 3, 0, 2, 7" and 1 respectively. Everything works fine, i designed flip-flop tables and input-outputs ...
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4017 IC block diagram

I am really confused with the block diagram of 4017 IC. Here's the dataheet. I really can't wrap my head around the way they have taken the output for each count. They are just taking two flip to ...
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Unary-type input to binary output in Verilog?

I've built an FPGA-based circuit which outputs to \$n\$ ordered bits strings which take on the form of either \$k<n\$ \$1\$'s followed by \$n-k\$ \$0\$'s, or \$k\$ \$0\$'s followed by \$n-k\$ \$1\$'...
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1answer
39 views

pausing d flip flop output

I want to make a digital timer that counts to 99 minutes 59 seconds the problem is that i want to use 4 digit 7 segment display so i have to oscillate the input of the bcd to 7 segment display between ...
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23 views

Preparing custom / arbitrary sequence counter

I know following types of counters: Asynchronous counter Clock input of each flip flop is output of earlier flip flop.[ref] Synchronous counter variant 1: with ANDing for flip flop inputs ...
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1answer
92 views

How to wire up a street light to change lights in specific states (digital circuit)

This is the final project for the only electronics course in my career. I have never taken any other electronics course and I'm seriously at a lost here. I need to score 100 here to pass the course. ...
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How do I know which logic gate I use to reset asynchronous counter?

I'm a High School senior. Our new teacher doesn't teach well at all and we have a test this Thursday. I don't know which gate to use with the counter(with JK flip-flops) to reset it. Or to set it(To ...
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Is the TC (“terminal count”) output of a 4-bit sync counter (74163) reasonably assumed to be glitch-free?

My gut tells me so, but the proof eludes me. Effectively this output is the AND of all four bits. These four bits go from 0 to 1 at very distinct times, assuming the counter is running at a ...
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1answer
54 views

4-bit synchronous counter IC: Do I need to pre-synchronize the count enables? (Metastability?)

Using a 74LVC163 synchronous 4-bit binary counter and would like to predicate the counting on an asynchronous signal. If I apply this signal directly to one of the enables (e.g. CEP), am I assured ...
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221 views

Mod-3 asynchronous up counter using T flip flop in verilog

Design: ...
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Why IC CD4060BD in Multisim there is no pin for VCC and Ground? It's suppose in pin 8 and 16, but there is no such pin in Multisim

I really find it hard for finding the pin in Multisim, maybe it's because I don't know it yet, but there is no pin for ground and VCC for IC CD4060 in Multisim. Do you know which the pin for ground ...
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92 views

Finding frequency of a series of pulses (3 - 60 Hz) without using a microcontroller or frequency-to-voltage converter

I came across an interesting yet challenging problem of finding the frequency of a series of pulses. The pulses can have a frequency anywhere from 1 to more than 100 Hz. The goal is to detect if the ...
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66 views

Bidirectional Counter implementation using internal counter

There was an assignment as follows: Design a two directional three-bit counter with the following functionality. the counter is changing its value on each positive edge of the clock. the counter's ...
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2answers
74 views

How do you make a digital counter circuit which counts to 10 minutes and 15 minutes, it will give a signs buzzer? [duplicate]

I asked in this site before, but apperantly I don't quite understand. I want to make a digital counter circuit which it counts to 15 minutes for my big project in my campus . When the circuit counts ...
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1answer
134 views

Implementing 4-bit counter on GAL 16V8

I want to use a GAL 16V8 to implement a 4-bit counter using Verilog. I'm using Lattice's ispLEVER software. So far I have had no issues using Verilog to implement combinational logic. However, I ...
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65 views

2-Bit timer with 1 ms period

I am trying to find a simple hardware solution to implement a 2-bit timer that gives out 2-bits continuously repeating data 00, 01, 10, 11, 00, 01.... whose time period is approx 1ms. The accuracy and ...
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Synchronous Up/Down counter which shows given sequence simultaneously on 5 x 7-segment displays

I was given a project to design a Synchronous Up/Down counter which displays my sequence (2,1,0,6,5) on 5 x 7-segment displays simultaneously. I started first by designing the Up/Down counter and ...
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2answers
238 views

How can i make my mod 10 up/down counter wrap from 0 to 9 when counting down?

I know there is something wrong with my reset logic because when counting down it starts from 5 and changes if i have any wires connected to the reset of the flip flops. I don't know how to fix this ...
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57 views

Desiging mod counter

I came across following question The 3 bit ripple counter is to be designed as MOD 4 counter. What should be the architecture of the ‘Logic gate’? A. a 3 bit input AND gate B. a 2 input AND ...
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1answer
81 views

Curious Behavior In Logisim while trying to mimic a halt instruction

I'm in the process of trying to simulate a halt instruction based on some arbitrary value. My circuit design may not follow best practices as I'm disabling the overall or master clock sign with a ...
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1answer
57 views

8-bits synchronous up counter with arbitrary sequence

My question is about logic design, that's a subject that I'm studying now, especifically counters and registers. I designed a 8-bit counter using 2 4-bit counters (with load, count and enable signal) ...
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1answer
90 views

Starting and stopping of a Mod N Counter for a FSM in Logisim

I'm working on a circuit for control logic. I'm using a 3 bit down counter. There is a control signal that when it goes high starts the counter by presetting it with a value of 5. The counter is ...
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2answers
73 views

How to choose resistors in a decade counter circuit?

I'll start off by stating that I am a novice. I'm trying to figure out how to use a decade counter, so I've constructed this circuit: It worked fine, but now I'm wondering how it was decided to ...
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1answer
301 views

4-bit Self-correcting Johnson Counter on D flip-flops

I had a task assigned by my teacher to implement self correcting Johnson Counter. The task goes this way: Design a self-adjusted 4 bit Johnson counter. Counter must be implemented on d flip flops ...
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153 views

Why is my seconds counter in verilog jumping values behaviour?

I am implementing a seconds counter on the Altera DE-1 Educational Board powered by the old Cyclone 2 FPGA. My plan is to make a 'down-clocker' that takes the on-board 50 MHz clock and produces a 1 Hz ...
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74LS74AN Binary Up-Counter

I have an issue with my binary up-counter using a 74LS74AN D-Flip Flop The issue is the following: I am trying to toggle the flipflop state by sending it a 1Hz Square wave (5V Peak) to make it toggle ...
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1answer
86 views

A 4bit counter that goes up and down

I am kinda new to the website, I just came across it after looking for answers for such a long time. I have an assignment that asks to add an input bit to your circuit from the circuit I created that ...
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1answer
202 views

8-Bit Program Counter Implementation

I'm trying to construct an 8-Bit Program Counter, in Logisim. It currently has functions LOAD, which makes the 8-Bit input (A0-A7) appear at the output (S0-S7) on the clock pulse: Loading 1 as input: ...
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1answer
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Designing a counter

I want to design a counter which doesn't increments value every rising clock pulse(assuming positive edge triggered). Say I have a FSM which has 4 states . Only after traversing of the 4 states , I ...
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63 views

How can I improve my 3 decade counter design so that it counts sequentially in Verilog [closed]

I am attempting to build and simulate a 3 decade BCD counter by cascading 3 decades counters that produce an output to indicate when the count of 9 is reached. My design works, in that it counts ...
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102 views

Counter and elementary logic gates

I need to create a counter that counts down from 59 to zero. For that, i created a simulation in Proteus software where i used 4510 IC as a down counter and created the following circuit. Now, i ...
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60 views

LED Chaser using counting IC

Total beginner here, I'm trying to build an "LED Chaser" circuit using an IC (CD4022BE) that counts to eight (from zero to seven, and then it wraps around and goes back to zero). Before trying to ...
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1answer
38 views

Parallel 4221-BCD counter on D-triggers

I`m new on it, consider it please. I have to build a 4-bit counter in 4221 bcd using D triggers. Learning about triggers, and seeking for completed schemes, I made the next one: Took the classic ...
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1answer
64 views

Enterprise model blinkers - two fast flashes and pause for 3s and repeat LED circuit (with 555 and/or 556 and/or 4017) [closed]

I'm building a Revell Enterprise Into Darkness model with LEDs and I need help with circuit that makes two fast flashes, pauses for 3 seconds, then repeats. as seen in the movie. I have searched and ...

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