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.
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Spec sheet diagram re: NEC u7225PD LCD Driver (14 segments)
This question is in regards to figure 6 of the uPD7225 Programmable LCD Controller/Driver data sheet. My use case is typical: a 14 segment driver clocked at 147k in divide-by-four mode.
From the ...
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Delay in cycle while making 3-bit up/down counter
simulate this circuit – Schematic created using CircuitLab
I am trying to make a 3-bit up/down counter, after failing to use xor IC I resorted to AND and NOR ICs, but the result of the IC starts ...
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Why does this Verilog counter design code have a syntax error?
I am a beginner in Verilog, and I am trying to design a counter. My aim is to increment the count value whenever I press the switch sw. But, I am getting a syntax ...
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Trigger (Flip-flop) with under 3 ns delay?
I want to make nanosecond clock timer as a 64-bit counter.
There is a scheme (4-bit):
I am trying to find JK-trigger, or other, that can work with 300 Mhz clock speed, at least, i.e. 3.3 ns at most, ...
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Counter showed 50Hz when I put it across my body. Why?
I was messing with my new counter when I connected it to fingers and it showed 50Hz (the AC frequency in my country.)
Why?
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Why is my code output always showing 0?
This is a 4 bit counter code written using Verilog HDL on Quartus. Can somebody explain why is my output o always showing 0?
Code in Text :
...
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Shooting Game Design on Proteus not Working
I'm designing a shooting game using 555 timer and 4017 counter. The counter should successively light up 9 LEDs, one of which is a green LED and the rest are red LEDS. When the counter reaches the ...
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A binary counter problem
How can I create a digital counter that counts from 000 to 111 and automatically starts reverse counting from 111 to 000. I have tried with simulation it works fine, but with actual ICs I am not ...
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Digital Counter not initializing to 0 or rolling over to 0
I'm trying to make a 3-bit counter using D flip flops that loops through the sequence (0,3,4,5,7) repeatedly.
So far, I've made a timing trace, block diagram, operation table, Karnaugh maps, rough ...
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Turning on an alarm after counter reaches 99
So I'm working on a 2 month design project with the following description
I'm trying to exhaust the possible ways to design this without using microcontrollers or ready-made chips.
Some of the ...
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How can I use a 555 timer and a binary counter to determine the frequency of a square wave pulse?
I'm trying to build a circuit to determine the frequency of a given square wave pulse. The pulse will be generated by a function generator.
I have a 555 timer, a binary counter, a seven-segment ...
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Discrete I2C counter IC
I feel a bit like I'm losing it... I can't seem to find a (modern) I2C counter chip; something that will take random events, sum them up, and let me poll from a uC a couple times a second. Events can ...
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How to read the VMZ 08 magnetic inductive flow sensor?
We are in a near-emergency situation where we must read a VMZ08BS1PEG24CV0 flow sensor. You may see more information including the datasheet here.
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8-bit binary to BCD decoding for three 7-segment displays
I've created a circuit that uses both binary and BCD counters to convert an 8-bit binary number into three BCD numbers, which then feed into BCD to 7-segment decoder chips, and finally to common-anode ...
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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-...
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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 (...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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')''
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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 ...
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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.
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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 ...
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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 ...
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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:
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Low power ripple pulse counter [closed]
I'm trying to find a ripple/pulse/edge counter chip that can record rising edges from a wind anemometer while my AVR sleeps. The signal is typically 0-50 Hz. I want to read it every 10 minutes, so it ...
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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 ...
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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 ...
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3 bit synchrous up-counter stops at six but it need to be stop at seven
I am trying to design a 3-bit counter circuit with jk flip flops that count from 0 to 7 with a clock signal and remain constant at 7 until reset.
Counter counts well but it stops at six not seven.
My ...
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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 ...
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Trouble with Schematic Diagram - Distance measurement using radio waves
I am working on a project to find out the distance with 2 objects using radio waves.
On one end we have a transmitter/receiver than sends a signal to another transmitter/receiver which spontaneously ...
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VHDL Knight Rider
I am newbie in VHDL. In my code, everything seems right but code doesn't work properly. I couldn't find where my fault is. Any solutions?
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