Questions tagged [cd4017]

5-stage Johnson counter having 10 decoded outputs.Inputs include a CLOCK,a RESET and a CLOCK INHIBIT signal.Permits high-speed operation ,2-input decode-gating and spike-free outputs.

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2answers
47 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
55 views

One time blink then turn off circuit

is it possible to change Circuit Diagram for the following example: http://www.redcircuits.com/Page146.htm or https://www.youtube.com/watch?v=mrxdiO1b29A Original: 4 short flashes stay on light ...
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3answers
157 views

60 LED chaser sequencer, two LEDs turn on at a time instead of one

I am trying to make a 60 LED chaser. I don't want to use microcontrollers as it makes the job too easy. I have got lots of CD4017s with me. I searched the internet and got a comparatively simple ...
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4answers
572 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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1answer
140 views

3 simultaneous led chaser using only 555 and 4017

I've to design a circuit which consists of 30 LEDs in a row (RED, BLUE and GREEN) followed by a led matrix which spells out IN. Conditions which I've to follow: When the circuit is powered, ...
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3answers
512 views

Resetting CD4017 Counter when power source is OFF

I found the circuit below online and I have two questions about the reset switch. Does it help to click the reset button when power is OFF? I mean, does it clears the memory of the CD4017 chip when ...
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2answers
197 views

CD4017 with multiple LEDs

Here I solved most of my doubts from this site.Thanks to you all and cos of that I come this far. 1 . I wanna cycle through the various color LEDs using clap . 2 . I use a switch to cycle through ...
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2answers
57 views

Electronic bell for lecture [closed]

please help me about this project. I want to make electronic bell. Which duration time is like 10.45 AM to 11.45 AM ..1st lecture 11.45 AM to 12.45 PM .. 2nd lecture 12.45 PM to 1.30 PM lunch break ...
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1answer
175 views

Unable to trigger NPN Transistor from 4017 decade counter output

I am trying to make a unipolar stepper motor driver circuit. As a development landmark, I am trying to first run LEDs using the driver. Attached is my circuit. My 555 timer generates regular pulses ...
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3answers
274 views

lock the 10 outputs of 4017 to HIGH

I am a beginner in electronics. For a project I have to use five 4017 counter and I understood how they works: one of ten outputs is high at the same time. But at some time, I need to set HIGH the 10 ...
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5answers
1k views

Simple Mosfet driver

I need to switch 8 IRF9540 (P-Channel Mosfets) with about 32kHz (so 1 MOSFET about 4kHz) so that only one is On at one time. I thought about using the decade counter 4017 for this, and the 555 Timer ...
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3answers
1k views

On— off— on— off timer circuit

I want to make a circuit to do something that is relatively simple but I need to find the optimal way to do it in order to take as little current as possible. Here is what I want to do: When a ...
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2answers
278 views

With a 555 + 4017, how do I light 7 LEDs, then 6, then 5… then 1 then 0?

I'm in the process of turning a Raspberry Pi project into a simpler circuit board powered with 555 and 4017 chips. I want to be able to start by showing 7 LEDs, then go to 6 then to 5 and so on until ...
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2answers
635 views

Baby 10 step sequencer help!

I'm a beginner in electronics and am working on a Baby10 step sequencer for a project. It consists of a 555 timer for a clock signal, a CD4017 decade counter and 2 more 555s for an Atari Punk Console ...
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1answer
659 views

Ultrasonic sensor without micro controller

I have been researching how ultrasonic proximity detection works and I believe the HC-SR04 would be a decent fit for a project. The sensor unit looks like this. I would like to know is if this ...
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2answers
2k views

Power-on Reset for CD4017 gives unexpected results

In the circuit below, a 555 timer produces approximately 1 pulse per second, and the CD4017 counts pulses. The initial state of a CD4017 is undefined, thus I need a reset pulse on power up. In the ...
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1answer
91 views

How do I get my 555's output to cycle through different paths with just one button?

I'm an amateur so this is a basic question. I have a 555 in astable mode producing a frequency which I put through a speaker as a musical note ("musical" is debatable). I can get lots of different ...
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1answer
620 views

Traffic light circuit

There is a traffic light circuit that I have built shown above. It works on circuit wizard just as I want but when bread boarding both the astable and monostable work however my 4017 does not I have ...
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1answer
546 views

output waveform of CD4017 [closed]

We are trying to create a chaser circuit using a CD4017 counter with the output of a 555 timer as the CD4017's input. The schematic diagram used is here (photo taken from circuit digest): When ...
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3answers
946 views

100 LED chaser with multiple LEDs on at the same time

I'm sure this has been covered but I am not finding answers to what I am looking for. Just getting back into electronics after well over a decade...so I'm a bit rusty. :) What I need is a 100 LED ...
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2answers
272 views

CD4017 Decade Counter Based LED Flasher Question

I am creating a simple LED Flasher with NE555 and CD4017. I am actually dividing the pulse frequency of NE555 by five. Because I have merged each pair of the output pins to finally get 5 outputs. I ...
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1answer
147 views

CD4017BE output pin question

I am designing a circuit which uses a CMOS decade counter to activate and deactivate pairs of transistors in turns.The problem is:will the IC be damaged if the current of one of the outputs(activated) ...