The IC 4017 is a versatile counter divider IC which can be applied for making many different interesting electronic circuits. In this post I will explain about a few useful yet simple 4017 IC circuits and projects, assorted and compiled from this blog.
![](https://www.homemade-circuits.com/wp-content/uploads/2021/05/4017-IC-image-compressed.jpg)
How to Understand IC 4017 Pinouts
Before we delve into the many circuits built using the IC 4017, it would be very important to first learn how the various pinouts of the IC are designed to work. This chapter explains in details regarding how to configure the pinouts of the IC 4017.
![4017 pinout description functioning](https://www.homemade-circuits.com/wp-content/uploads/2011/12/8.jpg)
Sequential LED Array Light Circuit Using IC 4017 Explained
Are you interested to build a sequential mains controlled running lamp circuit? For users who want to build a device which will allow 10 mains AC operated lamps to light in a sequential manner, creating running lamp effect, this simple 4017 project can be the one you are looking for.
![](https://www.homemade-circuits.com/wp-content/uploads/2011/12/LEDbar.png)
Electronic Dice Circuit [Digital Dice]
We all have played some or the other way, with this thing called the dice, which has a cube like structure with 1 to 6 dots printed on each of its 6 surfaces. In this specific article I will explain how to build the electronic version of the dice, which would produce the same results as our old manual dice, but in the digital format.
![](https://www.homemade-circuits.com/wp-content/uploads/2021/05/4017-dice-compressed.jpg)
3-Digit LED Capacitance Meter Circuit
Capacitance meter is a very useful device which can be used for measuring the values of unknown capacitors. This feature is mostly not available in regular digital multimeters. But this can be easily built using the IC 4017 through a simple circuit as discussed in the following article.
![](https://www.homemade-circuits.com/wp-content/uploads/2021/01/capacitor-meter-compressed.jpg)
Converting Wasted Spark Ignition to Sequential Spark, for High Efficiency Combustion
As the name suggests this 4017 based circuit has something to do with the saving fuel in vehicles. That's right, the above customized simple 4017 circuit is configured in such a way that its sequential output can be used for converting the unused sparks in a car engine into useful combustion, thereby improving the fuel consumption of the vehicle and the overall efficiency of the vehicle. More can be read in this article.
![](https://www.homemade-circuits.com/wp-content/uploads/2020/12/wasted-spark-compressed.jpg)
Touch Dimmable LED Light Bar Circuit
The IC 4017 can be also used for making a touch operated LED lamp, which will simply respond to your fingers for switching ON and Off. You can learn more about this simple IC 4017 based touch activated LED lamp project in the following post.
![](https://www.homemade-circuits.com/wp-content/uploads/2020/01/touch-dimmable-led-light.png)
Rotating LED Chakra Circuit for God Idols
A rotating LED lamp can be a great way of decorating any specific item, mostly the ones that are related to gods, such as a god idol. Just imagine, some bright colorful LEDs moving in circles at the back of the head of a God idol, this can create an awesome looking decoration item, and can be a great piece of attraction at home. In the following post I will explain how to build one such simple 4017 circuit projects.
![](https://www.homemade-circuits.com/wp-content/uploads/2019/08/rotating-chakra-using-LEDs.png)
4 Simple Clap Switch Circuits [Tested]
A clap switch is a device that operates a load ON/OFF in response to clap sounds. An ordinary IC 4017 circuit is quite sufficient for configuring a great sound operated relay switch which will switch ON and switch OFF any load connected to the output relay. One such project is explained in the following article:
![](https://www.homemade-circuits.com/wp-content/uploads/2011/12/simpleclapswitchcircuit.jpg)
7 Modified Sine Wave Inverter Circuits Explored – 100W to 3kVA
A sine wave inverter is always considered to be a complex project since it allows the generation of the output AC with a pure sine waveform. However, you can easily construct a an almost pure sine wave like 220V inverter using a single IC 4017 and a few other components, as explained in the following article:
![](https://www.homemade-circuits.com/wp-content/uploads/2018/08/modified-sine.jpg)
LED Chaser Circuits – Knight Rider, Scanner, Reverse-Forward, Cascaded
It seems we missed this one of the most popular applications of the IC 4017. The application is about LED chaser circuit which works specifically by suing this Johnson's counter divide by 10 IC 4017. A number of different chser circuit are covered under this post, which includes, the famous knight rider chaser, LED scanner circuit, 16 LED cascaded chaser and many more.
![](https://www.homemade-circuits.com/wp-content/uploads/2020/03/light-chaser-circuit.jpg)
There are plenty of more simple 4017 IC circuit projects that you can build, and exploit the huge application range of this extremely useful IC.
Miscellaneous 4017 Circuit
This is a circuit for a 10-stage sequential LED flasher or chaser, in which a single LED is switched on at any one instant and the other nine are off, with the on LED advancing one step up in response to each input clock pulse.
![](https://www.homemade-circuits.com/wp-content/uploads/2021/08/4017-flasher-circuit-compressed.jpg)
Reversing the polarity of all LEDs and connecting their common point to the positive supply line produces an alternate action in which nine LEDs are on and one is off at any one instant, and advances in response to the clock pulses at pin#14.
Musical Tone Generator
![](https://www.homemade-circuits.com/wp-content/uploads/2021/08/musical-tone-generator-circuit-compressed-1200x464.jpg)
A desired musical tune or melody may be generated with this circuit of a 10-stage 4-note musical sequencer. Several more resistors can be added to the R1-R4 network chain to maximize the number of accessible notes.
How to Create a Single Output Sequence and then Stop
![](https://www.homemade-circuits.com/wp-content/uploads/2021/08/how-to-stop-and-freeze-4017-output-sequencing.jpg)
The above 4017 circuit demonstrates a simple way to wire the 4017 such the counting freezes after a preset counting sequence. The counter is configured to halt as soon as the "9" output drives the clock inhibit pin#13 high. By pushing the reset switch PB1, the counting sequence could be reinitialized. This also means that, by connecting any other desired output pin with pin#13., the sequencing could be made to halt on that specific output pin.
More of these projects can be found under the following Link:
Would you please show me a circuit that uses the 4017 chip switching on up to three leds [one at a time] whenever I press a momentary tact switch? Thanks so much. Len.
Sure, You can try the following design:
https://www.homemade-circuits.com/wp-content/uploads/2024/02/3-LED-sequential-output-using-IC-4017-and-tact-switch.jpg
I need help in wiring up a 4017 circuit where I use a momentary touch switch to switch on 4 separate latched-on leds and this is repeated only when I touch the momentary switch. In one of the on positions I think that I can figure out how to have two outputs latched on at the same time. So- the tact switch is pressed and #1 led comes on. The tact switch is pressed again and #1 led goes off and #2 led comes on. Tact switch is pressed again and # 2 led goes off and #3 led comes on. Tact switch is pressed again and # 3 led comes on along with # 4 led. Thanks so much for any help that you can give me. Len.
Thank you for your question,
However, the outputs of IC 4017 can produce only one output ON at a time. Having two outputs randomly latched may not be possible with single tact switch.
Let me know your thoughts on this, or if you have any other opinions.
In the touch dimmable led light bar circuit, I noticed that you are using NPN transistors to power the LEds. I am working on a circuit where I want to drive several LEDs with a 4017 and I want the high side driven by the 4017 which can’t drive several LEDs because of current limitations. Therefor I plan on using a similar design to this design. My question is: can I substitute BT169 SCRs for the NPN transistors? This might make the LED circuit more interesting. I know it is standard procedure to drive LEDs from the low side with transistors and with their emitters connected directly to ground. With my limited knowledge I have never quite understood how to use NPN transistors to power circuits, only to ground circuits. Thanks for your time! I would appreciate your input.
Hello Norman, The transistors are configured as emitter followers which can replicate their base voltages at their emitter loads.
The bases of the BJTs are configured with decreasing voltage levels through resistive divider network, which ensures a decreasing voltage for the LEDs as the 4017 output moves sequentially causing the required dimming effect on the LEDs.
These BJTs cannot be replaced with SCRs, the dimming effect would not work then.
I have been exploring options and feel this chip holds the solution to my issue. I have a momentary output of 12VDC(+) that I need to cycle through 3 outputs to have a (-) constant until the next (+) pulse. 1st (+) pulse = a (-) constant on output 1 until the next (+) pulse which deactivates output 1 and activates output 2 (-) constant until the next (+) input which deactivates output 2 and activates output 3 (-) constant. The next pulse would need to turn output three off and remain in that state. The next (+) pulse would then start the cycle over. Any assistance would be greatly appreciated.
Yes, the above IC can be configured for your specific application. However, the 4017 IC normally will produce (+) outputs sequentially. It will not produce (-) outputs.
It may be possible to convert the (+) outputs into 0V outputs if required, through NPN transistors stages connected across each output of the IC.