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.

Filter by
Sorted by
Tagged with
0 votes
0 answers
27 views

Counting sequence for this decrementing counter

I need help understanding the full counting sequence after resetting this decreasing counter. I've attempted to write the sequence but it seems incorrect with unexpected jumps between numbers. 0, -7, ...
0 votes
0 answers
35 views

Up-counter that counts in binary, Aiken code and Gray code depending on the input X [closed]

I have to design a 4-bit synchronous up-counter consisting of JK flip-flops that can count in binary, Aiken code and Gray code depending on the given input X. There supposed to be 2 logical inputs X ...
0 votes
0 answers
51 views

Can a CD40110 start counting from 1?

I have a small assignment to made a century clock (which includes year, month, day, hour, minute, and second) without using a microcontroller. I decided to use a CD40110 to drive a common-cathode 7-...
  • 1
-1 votes
0 answers
64 views

How to design a 3-bit asynchronous counter using JK flip-flops that counts a particular sequence?

The JK flip-flop does not have PRESET or CLEAR; only 3 flip-flops are allowed. The desired sequence is "0, 1, 2, 3, 4, 1, 6, 7, 6, 7" and eventually loops between 6 and 7. Using a decoder ...
0 votes
1 answer
70 views

Need to build a counter circuit using D-type flip flops [closed]

I can only learn by examples it seems. I feel I've understood my classes well... but I cannot for the life of me decide where to begin, or link my understanding to anything practical right now. I need ...
1 vote
1 answer
71 views

What are these pins on a counter chip?

I use EveryCircuit as a simple circuit simulator. For my very novice-level fumblings it has served me well. I have been using this chip, which is called Counter IC. It has 4 output pins A-D, which ...
  • 1,081
1 vote
1 answer
84 views

Why does the up down counter with 7-segment simulation always show X output? [closed]

Why does the counter output remain unknown (x)? I expect the counter to increment. ...
1 vote
1 answer
48 views

Custom frequency divider (/timer) question [closed]

How can I make a frequency divider with multiple outputs with these conditions: no microcontroller can use up to 4 SOIC-16 chips or up to 8 SOIC-8 (or any combo) can use one crystal/oscillator 9v ...
  • 35
2 votes
4 answers
375 views

0 to 999 Hz frequency counter

I'm trying to build a frequency counter with a resolution of 1 Hz that will count any frequency between 0 and 999 Hz and hold that value. I've built the following in Multisim but I'm having trouble ...
0 votes
0 answers
22 views

Simulation problem in OrCad

This simulation in OrCad just shows 0 output on all Y, A and B. I tried it on different online simulators and it worked, but I need it to work in OrCad. I can't figure out what the problem is.
  • 1
0 votes
2 answers
49 views

Counters max. frequency vs output transition time + propagation delay

I'm using a 74HC93 as a counter. According to the datasheet @ 25°C and 6V: propagation delay CP0 to Q2 = 31 ns transition time = 13 ns max. clock frequency = 35 MHz = 28.56 ns From what I've ...
  • 49
0 votes
1 answer
37 views

Setting internal oscillator for 4060 counter IC

I'm trying to setup two 4060 counter ICs, to run from internal rc oscillator. The first one will be set to 32Hz, and its pin 3 output (which divides the input clock by 1024), will be fed to pin 11 of ...
  • 35
3 votes
1 answer
165 views

Will the LVDS signal rise time improve after a counter IC?

I want to improve an LVDS signal's rise and fall time. With a Cyclone III FPGA, the LVDS signal has a 500 ps rise and fall time. If I apply these signals to a counter/divider IC like the SY100EP33VKG ...
3 votes
2 answers
215 views

Verilog counter stuck at 48

For part of my VGA signaling module, I've had to make a specific horizontal counter and vertical counter to a keep count the pixels. I've been stuck on these counters because they don't get past 48 ...
  • 95
0 votes
1 answer
39 views

Modulus 11 Counter

I'm trying to build a modulus 11 counter that will count from 0 to 10 and reset at state 11 in Multisim using a 4516 counter and a D-FF based off the following figure: Because the D-FF inserts a ...
2 votes
1 answer
46 views

Modulus 5 counter

I'm trying to build a Modulus 5 counter using TTL in Multisim that will count 0-4 and reset on 5. From the K-map I got Q2' + Q0' and using that... Strobe = Q2'+Q0' Strobe''= (Q2'+Q0')'' = (Q2'*Q0')'' ...
2 votes
0 answers
88 views

Frequency counter capable of measuring a range of 0 to 99 Hz

The frequency counter in Figure 2 has a range of 0 to 9 Hz and a resolution of 1 Hz. The schematic for this circuit is shown below: I'm trying to understand how this circuit works and how to increase ...
1 vote
2 answers
99 views

Frequency measurement with counters

I'm trying to get the following circuit to work. It says to: Connect the circuit as shown in the block diagram in Figure 2 by adding a NAND gate followed by a CD4029 connected as a decade counter. ...
2 votes
2 answers
147 views

Unexpected behavior in waveforms

Question: I was trying to make a counter that counts from 0 to 255 with different steps. For example this counter based on a control input could start counting from 0 with a step of +5. So we will ...
0 votes
1 answer
157 views

Why does this circuit's output oscillate/behave erratically?

I built the following pulse-width-recognition/digital-filter circuit on a solderless breadboard. I used 1/4 of a CD4011BE with another 1 µF bypass capacitor as the inverter, a perfboarded CD4060 ...
0 votes
1 answer
780 views

Designing a Mod-6 synchronous counter with specific behaviors?

So a Mod-6 synchronous counter can be designed by using 3 D-flip-flops connecting the output of the previous one to the next and having the complement of the last one as the first ones input. However, ...
0 votes
0 answers
38 views

Problem updating Timer or Counter period on-fly for STM32L4 MCU

I'm trying to update TIM 2 period but it is not working. MCU is STM32L4 series Timer 6 is configured to trigger an event at every 1ms and Timer 2 is in counter mode which counts number of positive ...
0 votes
0 answers
36 views

Analog step sequencer schematic help

I'm currently working on an analog step sequencer for a synthesizer I'm making. It has a split rail 24 V supply (so +12V, GND, -12V) and follows the Kosmo specification. The features I want are: 8 ...
0 votes
1 answer
32 views

Cycling through 3 outputs on clock pulse component choice

Is there a better way to cycle through 3 outputs in a loop on clock input? I'm currently using a CD4017 with the 4th counter tied back to reset, and this does work well enough. The fact that it is a ...
1 vote
2 answers
650 views

Prescaler vs Counter Period (STM32)

For timers on the stm32, there is the option of setting prescaler and counter period. I understood that the prescaler is dividing the frequency before using it for the counter. However, it seems to me ...
  • 153
1 vote
0 answers
121 views

How do I stabilize the pulse widths of the 4029 Binary Counter?

I am working with a CD4029BE on a breadboard. The connections are as follows: VDD to +12VDC VSS to ground The clock input receives a 3Hz 0 to +12V clock pulse J1-J4 are shorted together, and then ...
0 votes
1 answer
205 views

How to create a mod-100 counter with two 7-segment displays using JK flip-flops?

Here is my whole diagram. There is no output while also clock is ticking... I think there is a problem with the counter, but I can't figure it out. I use rising-edge flipflops.
0 votes
0 answers
17 views

Calculate and determine characteristic curve \$ U_{DAC}\$

A DAC circuit. Calculate \$ U_{DAC}\$ and its characteristic curve after 16 pulses. Know, \$ Q_A, D_0\$: LSB; \$ Q_D, D_3\$: MSB \$U_{DAC}=0.1N_x\$ (\$N_x \$ is value input of DAC) IC74191 is 4 bit ...
  • 111
0 votes
1 answer
153 views

How can I measure 400 kHz frequency?

I would like to measure a 400 kHz sine wave. I am thinking of converting the 400 kHz sine wave to a square wave using a Schmitt trigger and then measuring the signal with a microcontroller. Yes, the ...
-1 votes
2 answers
158 views

Show how two 74293 chips can be connected to become an 8-bit counter

In the logic symbol below, in order to create an 8-bit counter, how should I make the connections so that each 74293 chip (4-bit counter) can turn into an 8-bit counter? I know that in an asynchronous ...
0 votes
2 answers
72 views

I need a low-cost oscilloscope that has event counter capability [closed]

I need to count the number of microstep pulses (generated by a microcontroller) being applied to a stepper motor controller. I would like to buy a low-cost (<$500) digital oscilloscope that has a ...
  • 17
2 votes
2 answers
79 views

Counter with 12 outputs

I have a 1Hz clock signal that I would like to run into an IC which has at least 12 outputs. Each clock pulse I would like the outputs to go high individually like an LED chaser. So all outputs but ...
-1 votes
1 answer
65 views

Complimentary PWM generation with timer IC [closed]

Provided PWM1, with frequency f and duty d, I need to generate PWM2 with frequency f and duty d but phase shifted 180 degree relative to PWM1. Requirements: small foot print, the board space is very ...
  • 417
0 votes
2 answers
102 views

1/60 Hz Counter/Divider

I have a fairly precise 1 Hz square wave that I would like to divide down to 1/60 Hz (1 pulse per minute). I want a one-chip solution and I am not having a lot of luck with this. I do not want a ...
0 votes
1 answer
325 views

Logisim - Initializing a state on a counter

Full context: I am building a stopwatch / countdown timer. The design is that there will be up/down counters that increment/decrement the time. The counters are then connected to 7-segment displays to ...
0 votes
1 answer
51 views

How can the minimal number of bits representing modulus of counter be smaller than the number of bits representing our output?

Suppose we want to have this sequence 30, 50, 1003, 30, etc... It's no hard to see that we need a MOD-3 counter because there're only 3 states. But this also means we need 2 flip flops. But how do we ...
0 votes
1 answer
110 views

How to create 4-bit asynchronous counter?

I am new to Multimedia Logic and am trying to create a 4-bit asynchronous counter. I did something like this, but it doesn't work. I'm not sure if everything is properly connected and if I was using a ...
0 votes
1 answer
67 views

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 ...
  • 699
0 votes
2 answers
271 views

Counter using only basic logic gates

I'm trying to make a counter (0 > 9) using only basic logic gates , I used the master slave jk flip flop and it work fine except that I don't know how to make it reset to 0 again after 9.
6 votes
4 answers
593 views

Is it satisfactory for me to use the Clock speed to create a random 4-bit using a synchronous counter?

I want to implement a circuit that generates a random 4 bit using a synchronous counter. Is it satisfactory to achieve a "somehow" random generator by using a parallel 4-bit counter with the ...
1 vote
1 answer
45 views

Multiple switches to independently control the counters

I just started studying electrical engineering this semester, and I'm currently working on the following counter to count the vacancy and occupied bed counts in a hospital for my school project: The ...
  • 11
2 votes
3 answers
959 views

Up or Down Counter? FPGA

I have a question related to the implementation of counters in an FPGA. I've read that it is better to implement down counters because when implementing up counters you need one additional comparator ...
0 votes
1 answer
67 views

I'm looking for a component / circuit that distinguishes between eight states

I use PSpice For TI2020, so I don't have a pre-assembled ring counter in the library. I'm looking for a way of setting a specific output to High from eight states that come from 3 flip-flops (up ...
  • 333
1 vote
1 answer
200 views

Flipflop's output voltages are 0V

I'm building a 4-bit asynchronous up counter with D flip-flops. Unfortunately the 4 output voltages are always 0V. Can someone please tell me why? I had already placed a digital source in front of the ...
  • 333
0 votes
0 answers
278 views

Trying to make a mod-10 counter with JK flip-flops in CircuitMaker but my outputs are always coming out HIGH instead of counting, not sure whats wrong

Trying to make a mod-10 counter with JK flip-flops in CircuitMaker but my outputs are always coming out HIGH instead of counting, not sure whats wrong
0 votes
2 answers
88 views

I need help with creating a ring counter (or sequential processing)

I have the following plans: I want to use a 555 timer in astable mode to light up 5 different LEDs. These should light up one after the other (i.e. not two at the same time). After that, there should ...
  • 333
3 votes
2 answers
413 views

4 way traffic light using 555 timer

I'm trying to build a 4-way traffic light controller in NI Multisim, using the 555 timer and a decade counter (no microcontrollers allowed). I used this as reference: https://circuits-diy.com/four-way-...
  • 181
0 votes
2 answers
444 views

Digital logic/sequential circuit to produce one pulse for every 5 clock pulses

I'm working on a problem where I'm trying to design a digital logic circuit (sequential circuit?) to produce output Y given input A: So the goal is to produce one pulse for every 5 input pulses. What ...
  • 3
0 votes
2 answers
660 views

How can I generate a 1 Hz clock from 100 MHz clock using VHDL?

How can I generate a 1 Hz clock from 100 MHz clock using VHDL? ...
  • 1
0 votes
1 answer
259 views

Verilog ring counter with skips

I want to try a counter starting from 0 to 12. It can be a simple counter. ...

1
2 3 4 5
12