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.
Questions tagged [counter]
594 questions
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Lengthening a 5 ns pulse
I have a 5 ns pulse width High coming out of a comparator that is asynchronous. I am attempting to count this pulse. My current microcontroller (dsPIC33FJ) has an asynchronous counter on board, with a min spec of at least 10 ns pulse width High.…
Cameron
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Counter for 20 GHz clock
I am designing time critical application where I need time resolution in order of 100 picoseconds.
I am considering to make an ring oscillator of 20 GHz and clock from ring oscillator.
Is there IC's for it or can I implement it using CoolRunner II…
Steve
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Very high speed counter (around 1.5 GHz to 2 GHz)
I am thinking of a device that can measure the distance of an object from a sensor using a radio transmitter and receiver pair.
I'm thinking of using a counter at the sensor side, with a fixed-frequency transmitter and receiver on the sensor.
There…
ironstein
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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 help of the clock speed?
For example, a button is pressed…
wd violet
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How do I make a nanoseconds counter?
I want to make a counter that can count the time between pulses in nanoseconds. The counter starts to count when a pulse enters a pin (at the start of the pulse) then stops when a second pulse comes. Then the timer sends a signal to either a display…
20Ola02
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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 high output from the CD4017. The output from these…
Harrito
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Ripple counters versus synchronous--pros, cons, and power consumption
Substantial edit--note that David Kessner's answer was written in response to the original posting; view the edit history to see what he was responding to
From what I've read of digital design, there is a very strong tendency toward the use of…
supercat
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Can anyone tell me any exclusive application of Johnson counter?
I went through many types of counter in my digital electronics text book. Each one was interesting. When I came across Johnson counter, I was not able to figure out any practical application. Can anyone help me for the same?
tollin jose
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five month countdown timer circuit?
I'm a beginner in electronics, so I just have an idea in my head and don't know how to actually make it. I want to make a countdown circuit, for an event in next 5 month. The display format is like this:
DDD HH MM SS
Days have 3 digits, hours,…
Netmoon
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How to interface a quadrature encoder with PIC?
I'm developing a prototype that uses a quadrature encoder to measure it's linear displacement. The encoder is attached to the prototype body and has a wheel in it's shaft. As the prototype moves straight forward the encoder measure the linear…
Bergamin
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Synchronous Counter to go through sequence 1,2,5,6,3,4,7,0
I have been working on a question which is:
Design a synchronous up-counter that goes through the sequence 1 2 5 6 3 4 7 0 and then repeats. Implement the counter using D flip-flops.
So Far I have the managed to work out the following:
Is this…
user3472448
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4017 counter: Why do some LEDs have multiple connections in this traffic light circuit?
Schematic (from here):
Why are four legs connected to the green LED and two to the amber LED in the 4017 traffic light circuit? Shouldn't it be able to do with only one leg per LED?
Robert Ford
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CD4029 does not initialize at 0
I am attempting to build a very simple 4 bit counting machine using a CD4029 ic and a 555 timer. I have built my circuit on a breadboard and everything seems to be working perfectly, however on the power up of the circuit the outputs id the CD4029…
Markovian8261
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Creating a Sequenced Array of 3 Mosfets with Adjustable Timings
I am comfortable with rudimentary 555 circuits and other basics, but I have something a little bit beyond me now.
I need to have three separate mosfets A, B, and C all turn on and off in sequence. I want to be able to control the timing of on state…
JamesHoux
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Very low frequency counter
I currently teach an introductory course to electronics that is mostly analog, but can incorporate some digital circuits. On our function generators, we have an arbitrary heartbeat shaped waveform and I thought it would be nice to try to make a…
Simon Marcoux
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