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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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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87 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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54 views

Basketball Scoreboard Circuit Question [closed]

I am trying to simulate my own basketball scoreboard project in LogiSim. This is a recreational project. I have attached a screenshot of my current circuit and its various ICs*. Currently, the ...
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Functionality of the circuit

I made the timing diagram for this circuit, but i am not sure if it is correct. Please confirm my timing diagram and what is the functionality of this circuit? Is it to generate a pulse 5 clock cycles?...
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45 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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74 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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87 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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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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65 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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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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63 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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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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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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56 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
50 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
54 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
58 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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215 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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121 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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76 views

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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82 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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104 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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52 views

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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61 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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66 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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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
34 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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57 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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1answer
120 views

Directly connecting LEDs to IC outputs

Forgive the amateur question - I don't know anything about electronics. I was not able to find any similar questions on this board, but that probably has to do with the fact that I know so little ...
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113 views

Designing a special 4-bit counter with flip flops

This is a normal design of 4-bit counter using D flip-flops The outputs Q0 to Q3 are connected to diodes. I want to modify this counter in such a way that it follows the following counting sequence ...
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1answer
53 views

Help using a 555 timer to increment counter that needs to be pulled low

I need a little help with a project. I'm very new to building circuits. I have this NE555 duty-cycle pulse frequency adjustable square wave generator module, which I have connected to a 12V DC source. ...
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2answers
76 views

Measuring accuracy and counting frequency?

The machines at my workshop have meter counters with hall effect sensor switches, which convert shaft rotation to electronic pulses. The switching signal is send to their PLCs' high speed counter ...
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2answers
127 views

Need help with a pulse/counter input circuit on hall effect flow sensor

I am having trouble wiring up a flow sensor to my pulse/encoder/counter card. I am using a hall effect flow sensor that works fine when wired to a digital counter display. However, when I try to ...
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1answer
64 views

How to create continuously incrementing counter in structural modelling?

I made the below counter and stimulus/testbench and it works fine. ...
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1answer
48 views

karnaugh maps simplification

I'm in the process of making a JK arbitrary sequence counter and I'm now making the k maps to get a logic equation. I was just wondering if this is allowed (looping the bits around the middle bit) as ...
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57 views

Calculating voltage drop and current use of an IC

I’m trying to figure out the voltage drop and the current used by a Johnson counter from a data sheet and am feeling a little lost. In particular I’m looking at a CD4022B from TI. I’m looking at ...
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1answer
45 views

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 (...
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621 views

Resetting two CD4017 counters simultaneously, only one resets

I am working on a simple 24-hour clock based on the CD4017. To reset when the clock reaches the 24th hour, two diodes are used to produce an "and" logic when the 2 digit and 4 digit LEDs receive a ...
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51 views

Driving transistors without using MCUs

I'm trying to drive transistors with just a push of a button without using a MCU. The circuit I drawn drives different transistor on every button push and resets back. First part is a debounce circuit ...
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1answer
76 views

Micro controller clock speed requirement for delay measurement

I am trying to measure the absolute time between two 1Hz clocks (GPS PPS events) to within 50 nanoseconds. I do not necessarily care which clock occurs first, I am only looking for the delta T between ...
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2answers
56 views

percision timing ratio of multiple lights blinking with different durations and intervals

I'm learning a lot of this as I go, my background is mostly in programming. I'm trying to setup a timing circuit for two sets of lights going into a model, and am trying to determine the best way to ...
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0answers
25 views

Tracking ADC Control Logic Not Counting down, only up?

I'm working on trying to build a "tracking" type ADC from individual components. Shown below is my schematic using the parts available in Multisim. The design is based on the 74LS191N 4-bit Up/Down ...
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32 views

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 minimum input reset pulse width is 30nsec at 10V, and the reset ...
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1answer
291 views

Verilog counter made of 32 bit adder (syntax error)

For a school assignment I have to make a counter, based on a 32-bit adder, that increments with 1 every clockcycle if 'enable = high' and 'reset = low'. When I try to use the adder in my counter ...
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1answer
81 views

Making a synchronized, rising edge reset signal to a decade counter [closed]

I made a decade counter as in the picture above, but i still would like to build a signal/button that would make the counter reset to 0 after the clocks rising edge when the signal is at 1, and to do ...
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3answers
528 views

How can I design a finite state machine that counts according to this sequence?

when X is equal to 0 and when X is equal to 1 I don't understand how to write the truth table. I understand that when X=1, it means that the machine counts in the following order: 1,3,2,6,4,C,8,9 ...