Cd4017 sequencer. Adjust VR1 to adjust the flow rate of the LED lights.

Cd4017 sequencer. Don't I need to put resistors in front of the leds? And shouldn't I power and ground the IC? I can just use 9v as power source, right? Any help on this is much appreciated! Aug 5, 2021 · I have made the "standard" 555/4017 sequencer circuit many times and in many forms. Here's the stripboard layout. Oct 5, 2025 · This is a new design of the classical LED Chaser Sequencer built with the combo ICs NE555 and CD4017. 5 V PCB size: 88 * 25mm PCB thickness: 1. Oct 24, 2025 · The kit mainly by the clock generation circuit and decimal counter circuit constitute. 2k resistors. By connecting the Carry Out output to other CD4017BE ICs, you can create a cascade connection. By having multiples of this circuit. Jan 4, 2025 · The CD4017 is a widely used decade counter IC, popular for its simplicity and versatility in digital electronics. Apr 6, 2010 · I started building a CMOS 4017 Sequencer based on the Baby 10. Instead, it uses a technique called a Johnson counter that makes it possible to achieve the same with only 5 flip-flops plus some logic gates. Sep 25, 2016 · Simple led chaser hobby circuit can be made using 555 timer and CD4017 counter IC. To make this chaser circuit with this IC, give input power to pin 16 Dec 15, 2023 · In this article, we'll explore a CMOS Decade counter CD4017 datasheet, pinout, equivalent, price, circuit, etc. Discover the design tips and how I achieved this #diy circuit based on CD4017 10 bits Counter. All LEDs are on and off- one BY one in sequence. One feature I am adding is a CV input that is added to the CV output of the sequencer (similar to the Doepfer A-185-2). ie In a short duration of time they are being switch I’m trying to design a 10 step sequencer with the CD4017 decimal counter, but I’m not sure how to make it reset after the 10th step without a second… Find many great new & used options and get the best deals for Ne555 & Cd4017 LED Light Chaser Sequencer Follower Scroller Module DIY Kit Set at the best online prices at eBay! Free shipping for many products! 8-step CV sequencer The Baby-8 sequencer is based on a straightforward implementation of the CD4017 decade counter. Mar 28, 2019 · 60 LED chaser sequencer, two LEDs turn on at a time instead of one Ask Question Asked 6 years, 6 months ago Modified 6 years, 6 months ago Jan 14, 2016 · Recently I’ve been learning more about classic analog music synthesizers and sequencers. The difference is that the light starts from two ends and then meets in the middle, and both go back to the start, and the process is repeated. The sequencer is build up around the CD4017 decade counter chip, using a CD40106 to create the clock pulses which also serve as the 'Gate' pulses. The circuit creates a lovely reverse-forward running LED impact which is the same as utilized in the vehicle of the knight rider television series. This is LED Chaser circuit diagram using two 4017 in cascade . We modified it from the LED Chaser circuit. In the "standard" configuration, the decade counter performs the Q0-Q9 count with one led on at a time. 2pcs x Large Round-PCB LED Chaser DIY KITs and JUMBO White-Frosted-LEDs NE555-&-CD4017. The purpose of this circuit is to turn the LEDs on one by one. Apr 17, 2017 · Hello community!! Long story, short. if you want to build along, here's the bill of materials: 1x CD4017 decade counter 1x TL074 quad op amp 5x BC548 NPN transistor 5x LED 5x 100k linear mono Oct 5, 2025 · NE555 & CD4017 LED Light Chaser / Sequencer / Follower / Scroller DIY KIT The LED Chasing Speed can be adjusted by the variable-resistor. Jun 26, 2020 · A CD4017 Johnson decade counter, three transistors, and other discrete parts. This new design has been tested and proven to work with the custom-made RED-PCB as shown in images at top. HeyyyyThis is my patchable CD4017 gate sequencer for the modular drum machine. Adjust VR1 to The CD4017 is a CMOS Decade Counter/Divider integrated circuit. For simplicity I only drew one instance, but I used two 4017s in my mock up so that I could have two 8 step sequences where the second 4017 has it's clock normaled to the first unless a second signal is plugged in. This new design has been tested and proven to work with the custom-made White-PCB as shown in images at top. Whether you’re an electronics enthusiast, hobbyist, or professional, our collection offers a wide range of CD4017 circuit designs to suit various applications. Jan 3, 2025 · Description LED Sequencer with CD4017 This project consists of a printed circuit board (PCB) designed to control a sequence of LEDs using the CD4017 integrated circuit. 3pcs x Mini Round-PCB LED Chaser DIY KITs and White-LEDs NE555-&-CD4017. Apr 9, 2021 · An 8-step sequencer based around the classic Baby-8 sequencer design. Kit Model: LSD-10. Mar 1, 2017 · How to build a simple 4017 based matrix gate sequencer for triggering or controlling gate for circuit bent toys, oscillators or other audio circuits Sep 23, 2023 · CMOS ICs are a great way to dip your toes into synth circuit design. I plan try to build three more once I have I get the gate to trigger via 4081 sorted. I've recently finished making a baby 8 sequencer, and after running for a minute or so the CD4017BE chip burns up (or explodes violently, as it did most recently). The kit mainly by the clock generation circuit and decimal counter circuit constitute. In this LED Chaser Circuit using 555 and 4017, the clock input of the CD4017 decade counter IC is wired to the NE555 timer. 19 in the datasheet and works great. 4 pcs x Complete NE555-&-CD4017 DIY LED Chaser KIT. The last time I tested without either inputs patched in, only using a single output Aug 16, 2021 · Amazon. To understand why the IC CD4017 circuit diagram is so popular among electronics engineers, we need to take a look at its inner workings. There are many designs out there on the Internet and many ready-designed kit… This LED running light circuit is capable to flashing sequence of 17 LEDs one by one. 3 pcs x Complete NE555-&-CD4017 DIY LED Chaser KIT. Each one has pros and cons, and CMOS chips in general have some quir Jun 19, 2016 · If we had a dime for every 555-based noisemaker circuit we see… But this one’s got a twist. This circuit is also called as “LED chaser circuit”. Jul 31, 2021 · IC CD4017 is a decoder IC having ten output pins. Oct 5, 2025 · Blue LED Chaser Sequencer Follower Scroller. Nov 18, 2015 · You must have seen different kinds of decoration lighting patterns. Jul 7, 2020 · In this tutorial, we are going to demonstrate a LED sequencer/ chaser using NE555 & CD4017. It's based on fig. The IC takes clock pulses and outputs a HIGH signal at one of its Sep 9, 2020 · CD4017 IC: The CD4017 is a 16 pin CMOS counter/divider which consists of 10 Johnson counters with 10 decoded outputs and a carry-out bit. On this case, a single LED lights, while the others are off. Led Sequencer 4017 Cascade Chaser Circuit Running Light Ic 4017 Cd4017 Datasheet Pinout And Its Working Process Explained Led Sequencer 4017 Cascade Chaser Circuit Running Light Ic 4017 Decade Counter Pin Configuration Its Applications Ic 4017 Cd4017 Datasheet Pinout And Its Working Process Explained 21 Game Other Circuit Basic Diagram Seekic Com Sep 6, 2021 · CD4017BE is a 5-stage Johnson counter and has 10 outputs. While ten is the basis for decimal counting, it's not always the obvious choice for musical composition - four, six or eight steps are much more common musical time signatures. The circuit consists of CD4017 will save board space and also the time required to design the circuit. Works on +9V power. It’s often used in LED sequencing, light chasers, and other projects requiring sequential switching. Aug 7, 2021 · There are three main parts on the device: A 555 timer in astable mode that generates a rising edge on a regular basis (the period can be modified with a potentiometer the user can control). In 4th grade, I was learning about the 4017 and 555 timers and I had the inspiration to create a form of musical instrument by combining them togther. LEDs light up in sequence. the input clock can be of any type such as an astable multivibrator, an inverter, logic gates, a pushbutton, or a dedicated timer IC. Is it going to matter if I power the cd4017 with 12V, so that the gates and triggers are 12V? Or should I use a 5V voltage regulator to power the CD4017 to make sure that the gates are all 5V? Moderators: mosc Page 1 of 1 [19 Posts] View unread posts View new posts in the last week Mark the topic unread :: View previous topic :: View next topic Exploring the CD4017: Functions, Pinout, and Alternatives The CD4017 is a popular integrated circuit (IC) known for its straightforward design and wide range of applications. This IC used 5 D-type flip-flops to count numbers. This is our clock signal for the sequencer. Contribute to ajcs1000/sequencer development by creating an account on GitHub. The figure shows CD4017 circuits that can be utilized to exhibit the IC’s fundamental actions and output driving characteristics. My demo: I'm building this circuit from the image below, which is an LED sequencer. I'm trying to make a 16-step sequencer using the 10-step LED sequencer schematic that's out there which uses the 4017 decade counter IC. The idea is that on every step of 4017 IC, the second 555 (so called "sound generator") produces a different sound, which is manualy adjusted by 8 potentiometers, attached on each output pin of 4017. 5 octaves up or down. I have a few questions about THIS schematic from an old thread here. [Tristan] does two things that elevate his sawtooth-wave noisemaker above the norm. However, it is capable of modulating a wide range of old test equipment, guitar pedals, synthesizer modules, or whatever may benefit from a varying voltage with respect to time. Jan 28, 2020 · Gallery Led Chaser Using Ne555 Cd4017 Hackaday Io Led Chaser Using 4017 555 Circuit Simple 220 V Ac Led Chaser Circuit Diagram Led Chaser Circuits Using Ic4017 And Arduino Garbage Telescope Technical Cd4017 Police Led Chaser Paolinoproductions Com Led Chaser Circuits Knight Rider Scanner Reverse Forward Cascaded Homemade Circuit Projects Oct 19, 2025 · 1 x NE555+CD4017 Light Water DIY Kits Electronic suite Water lamp module Red. ) The Tone Generator or the Atari Punk Console (the 556 dual timer, etc. com: NE555 & CD4017 LED Light Chaser Sequencer Follower Scroller Module DIY Kit Red : ElectronicsKit Model: LSD-10 Supply Voltage :3 - 4 . Here’s a simple way to build an LED chaser circuit using the 555 timer IC and the CD4017 decade counter IC. I made a 16 step seq, used two 4017 ic's and a TLC555 as clock. Includes 9 fun LED patterns, PCB layouts & simple diagrams. May 28, 2023 · The 555 timer generates a clock pulse, and the CD4017 divides the input frequency and sequentially drives the LEDs. CD4017BE pinout explained with clear circuit connections, features, and top applications. It is widely used in various applications such as LED chasers, frequency dividers, and as a building block for sequential logic circuits. By modifying the circuit in a proper way, you can even use this to control lights working on AC mains. Ten LEDs are connected to the 4017 decade counter outputs. It is a 16-pin counter that can count from 0 to 10 by turning on the 10 outputs one by one on every positive edge of a clock. The CD4017 is a CMOS counter IC with 16 pins, providing 10 outputs based on the clock pulses received at its clock input, pin 14. The CD40106 hex inverter is used as a low frequency oscillator giving off squarewave pulses who's frequency can be controlled by the 100K potmeter. Jul 23, 2016 · I've been working on a 8 (4)-step sequencer based on two 555 and one 4017 IC, and i've ran into a problem. This LED chaser kit(s) have a SIMPLE design for faster assembly/soldering. A CD4017-based Eurorack sequencer. 2 pcs x Complete and Fully Assembled Tested Blue LED Chasers. Related: LED, LED Bargraph, LED Bar Graph, Arduino BarGraph, LED Display, LM3915, audio/sound level indicator. Here is my 16 step 4017 sequencer. Application of CD4017 LED Sequencer using 4017 The LED sequencer circuit by using CD4017 and IC 555 is shown below. This is LED Chaser circuit using 4017 and 555. (Continue reading for a better understanding) Raw 10 Steps Sequencer (APC + CD4017) A small analog synth based on the 4017 decade counter LED Chaser / LED Sequencer using 4017 Decade Counter The square wave is applied to the clock input of CD4017 decade counter. This new design has been tested and proven to work with the custom-made PCB as shown in images at top. As a decade counter, it processes signals to produce sequential outputs, making it ideal for circuits involving timing, counting, and sequencing tasks. It is based on CMOS technology, which ensures low power consumption and wide voltage range operation (from 3V to 15V). Flexible 8 Step Analogue Sequencer Berlin School is a marriage of a classic CD4017 based analogue sequencer under control of a microcontroller, providing novel features like onboard clock divisions, quantised output, quantised manual & voltage controlled transpose, and 4/6/8 step sequence options. 1 Jun 25, 2020 · The CD4017 is an adaptable and simple to-utilize IC and has impeded yields that display marginally amazing attributes when driving LED-type loads. As a member of the 4000 series of CMOS ICs, it’s appreciated for its low power consumption, wide operating voltage range, and overall versatility. 2 pcs x Complete NE555-&-CD4017 DIY LED Chaser KIT. The counter can be any of several types including 4-bit, 8-bit, decade, or shift registers, depending on The "baby 10 sequencer" circuit utilizes the CD4017 decade counter, which is capable of counting from 0 to 9, making it suitable for sequencing applications. The Sep 10, 2017 · Amazon. The two 4017 counter are cascaded as datasheet prompts to. Sep 24, 2017 · CD4017 is an integrated circuit with five sections, each of which has its own schematic diagram. Jan 28, 2025 · LED Chaser Sequencer Follower Scroller. Oct 5, 2025 · White LED Chaser Sequencer Follower Scroller. Apr 9, 2022 · An LED chaser circuit (ring counter) is a repeating sequencer usually made by combining a clock with a counter. x Complete KIT Parts LED Chasers with BLUE LEDs. Ideal for beginners & hobbyists. SIMPLE LED Chaser design. This is simple Led Flasher circuit diagram using 4017 and 555 for blinking LED. Here Cascading two 4017 ic, Sep 23, 2017 · How To Understand Ic 4017 Pinouts Homemade Circuit Projects Cascade 3 4017 Counters Electronics Forum Circuits Projecticrocontrollers Ic 4017 Decade Counter Pin Configuration Its Applications Led Chaser Using 4017 Counter And 555 Timer Led Sequencer 4017 Cascade Chaser Circuit Running Light The Cd4017 Decade Counter Diyode Magazine Oct 5, 2025 · NE555 & CD4017 LED Light Chaser / Sequencer / Follower / Scroller DIY KIT The LED Chasing Speed can be adjusted by the variable-resistor. Jun 14, 2020 · A circular LED chaser is a simple electronic sequencer usually designed by combining a clock-generating device with a counter. This is a DIY KIT and it requires soldering. Jun 13, 2012 · Hi, I'm planning on building a gate sequencer from this schematic, but I don't know if it will work if I just follow the schematic. Any person with basic electronic-soldering-skills can fully assemble/solder this DIY KIT. We can reset and control counting with the help of reset and Built around the CD4017 decade counter, this sequencer outputs a programmable voltage (0-9V) per step for up to 10 steps. 4-bit Ring Counter The counter circuit in the CD4017 however, is not a standard ring counter. If you have any needs, pls contcact us for free, we will help you get all things you need. (only one LED is on at a time). From sequencers and timers to LED chasers and decade counters, CD4017 integrated circuits provide reliable and efficient I'm building a 4 step sequencer using the 555 timer and the CD4017 decade counter. The control voltage inputs allow for modulation of the sequencer's behavior, enabling creative musical applications. You can use this circuit for decorative purposes. Relay Module. The thread is too old to resurrect. This article explores the CD4017’s features, including its pin MFOS Ten Step Analog Sequencer LED and Diode To Switch Wiring Closeup PDF Wiring these panel components takes skill and patience but there aren't that many to do (just 10 sets of LED/diode combos). Learn how it works and how to use it. This is a counter/divider that takes an incoming voltage and sequentially outputs it through 10 successive outputs. This works great! One possible issue with this is that the output isn’t quantized to the V/Oct standard so you’d have to tune each step yourself. Oct 5, 2025 · LED Chaser Sequencer Follower Scroller. Adjust VR1 to adjust the flow rate of the LED lights. It was built specifically to modulate the frequency of an old Tektronix function generator. It utilizes a single CD4017 decade counter. Because of eurorack space, I am using a max of 8 steps instead of the 10. Dec 9, 2019 · The sequencer is build up around the CD4017 decade counter chip, using a CD40106 to create the clock pulses which also serve as the 'Gate' pulses. The panel will be a very tight 20hp eurorack (actually 2 8's and a 4). In this tutorial i will show you how to make simple a LED Chaser or Sequencer using 555 & 4017 circuit. Sep 29, 2025 · CD4017 datasheet This IC is CMOS-Decade counter/divider that can be used to build all kinds of timers, LED sequencers, and controller circuits. We're going to look at two specific ICs that can be used to make clock dividers: CD4017 and CD4024. Subscribe to my YouTub Oct 5, 2025 · This is a new design of the classical LED Chaser Sequencer built with the combo ICs NE555 and CD4017. it has 10 outputs for 0 - 9 and a carry to clock the next decade, so two will count to 100 unless you need the individual 70 outputs May 14, 2024 · There's a few sequencer features I've been looking for, which I'm curious about being implemented in an analog sequencer: Independently configurable start position and end position variable step distance, similar to the Bastl Popcorn I've been chewing on the ROT8 code to see if these features can be implemented, but the interface is a bit limited. This has led me to the Baby10, a classic and simple analog sequencer design. You can watch the video which is embedded in this step for construction, parts list, circuit diagram & testing or you can continue reading the post for further details. Jun 12, 2014 · The CD4017 IC at the heart of the Sequencer has ten outputs. My "touch" was that i used only "7" outputs including "0" (bad idea??) for the first 8 steps and output number "8" as a trigger to Oct 13, 2024 · Pinout of CD4017 IC: The CD4017 is a widely used decade counter IC that can count from 0 to 9 (10 outputs). In this tutorial, we are going to make a “ Simple LED Chaser Circuit that can be made using a 555 timer and CD4017 decade counter IC. So many of the CD4000 series are basically a module on a chip. com: XFCZMG NE555 & CD4017 LED Light Chaser Sequencer Follower Scroller Module DIY Kit Red : Industrial & ScientificThe kit mainly by the clock generation circuit and decimal counter circuit constitute By NE555 output terminal to produce a high level in the clock signal under the action of rotation, D1 - D10 are sequentially lit, thereby forming a flowing light effect. At its core, the circuit diagram consists of a single chip that contains 16 pins. This outputs are attached to 10 different potentiometers, so Aug 15, 2024 · A common early project for anyone starting to play around with analog synthesis is a “Baby8” step sequencer. CD4017 is a CMOS counter IC, it gives 10 outputs according to the clock pulse it receives from the clock input (Pin 14). It operates as a Johnson counter, featuring 10 output pins (Q0–Q9) that sequentially activate in response to clock pulses. This buffer gate is inside the integrated circuit. In this LED chaser circuit, we have created an interesting LED blinking pattern by using a 555 timer IC and Counter IC CD 4017. ) Jun 10, 2018 · The IC CD4017 circuit diagram is a versatile tool that can be used to create complex circuits, such as counters and sequencers. The configuration of the CD4017 is used for a counting sequence. Jun 17, 2020 · The CD4017 is, from memory, a decade counter. Any interesting sequencer Control Voltage mods I should consider Oct 19, 2025 · 1 x NE555+CD4017 Light Water DIY Kits Electronic suite Water lamp module Red. My problem is that where I am now I don't have a CD4017 to do the sequential, but I really need to make this circuit to de May 21, 2024 · Let us see some examples in which CD4017 is used. It's based on Moritz Klein his 5 step sequencer video… Pocket 10-Step Electronic Sequencer This is a simple sequencer project based on one CD4017 and three 555 timers. Total 10 LEDs connected in this circuit (one Extra -optional). Build reliable LED chasers, timers, and sequencers easily. but I am stumped for a solution on this one. The illustration below is a block diagram of inside IC 4017 / HCF4017. W can use it for low range counting applications. Feb 14, 2024 · Learn how to make a 555 timer music box - a 10-tone synthesizer, complete with how it works, a component list, and the assembly steps. The patching is kind of a weird workflow for a drum sequencer, but it IS fun a The 10 Step Sequencer (the 555 timer, CD4017 Decade Counter with 10 switches, potentiometers and LED's,etc. Not seen in the layout is the CLOCK in RESET pulled low through 2. The counter can be any of several types including 4-bit, 8-bit, decade, or shift registers, depending on the number of outputs and Oct 13, 2025 · NE555 & CD4017 LED Light Chaser Sequencer Follower Scroller Module DIY Kit Red D shengdao_04 (34) 100% positive Aug 21, 2014 · Hello all, long time lurker, first time poster. Detailed working and explanation of the circuit diagram with PCB design. The main block diagram consists of an input port, a logic control block, and a set of outputs. The component has 10 decoded outputs that can be used to generate a sequence of pulses, making it ideal for creating light displays or timing events in electronic projects. The clock can be any of several types including discrete components such as an astable multivibrator, inverter, logic gate, a pushbutton, or a dedicated timer IC such as a NE555. Jul 29, 2003 · Hi all, I'm fairly new here, though I have been reading posts for a while, I finally decided to register and post. Jul 14, 2025 · Simple 12 LED sequencer circuit Here is a 12-LED light sequencer circuit using CD4017 and NE555 as main components. The CD4017 is a versatile integrated circuit that offers various key features and specifications, making it a valuable component in electronic circuits and systems. Description: This circuit features a LED sequencer/chaser utilizing the CD4017 and NE555 integrated circuits (ICs). Hi all. The CD4017 is a decade counter with 10 decoded outputs, allowing the LEDs to be turned on and off in a predefined sequence. The DIY KIT requires soldering. Fully Assembled and Tested Installed LEDs are WHITE clear as shown in images. 2 pcs x Complete and Fully Assembled Tested White LED Chasers. Both the decoding and controlling parts contain 16 inverters and 15 other gates. Typical applications for the CD4017 include LED chasers, alarms, frequency dividers, or even a music sequencer. A CD4017BE decade counter that enable up to 10 different "outputs" each time the clock signal rises. My question is: Can this sequencer be used to perform a continuity check? I plan to etch a PCB using the schematic and at the point where Q1-25 Here is a circuit diagram of simple LED Flasher chaser which is very easy to construct and looking beautiful and interesting. Introducing a potentiometer after each output allows for attenuating the level of voltage that is allowed to pass. Designed with CMOS technology, it supports a wide voltage range (3V to 15V) and consumes minimal power, making it ideal for battery-operated devices. Let’s delve into the CD4017 decade counter circuit, exploring its pin diagram, specifications, and . Apr 12, 2022 · A redesigned version of the 8 step sequencer (project number 8) with external clock input option and offset control that allows you to transpose the sequence upto 3. It's a great companion to my SHAPES VCO. Therefore no external circuits are needed for that purpose. CD4017 Sequencer Baby 8 gate/trigger out question I'm building a baby 8 sequencer, I would like each step to have its own trigger or gate out. 0mm Circuit: The kit mainly by the clock generation circuit and decimal counter circuit constitute By NE555 core self-excited multivibrator power through R2, R1, VR1 to charge the capacitor C2, when C2 just Sep 17, 2025 · Build LED chaser circuits using CD4017 & NE555. First, he… The CD4017 is a versatile CMOS (Complementary Metal-Oxide-Semiconductor) integrated circuit (IC) primarily used as a decade counter or divider. Jul 19, 2025 · Find many great new & used options and get the best deals for NE555 & CD4017 LED Light Chaser Sequencer Follower Scroller Module DIY Kit Red at the best online prices at eBay! Free shipping for many products! Feb 14, 2020 · How to Make LED Chaser using NE555 & CD4017 The LED Chaser Circuit is basically a serial switching of LED’s in a continuous manner. Output Q0-Q9 counts according to the pulses applied to Clock, Clock inhibit and Reset inputs. The LED Chaser KITs can be powered from 3-9 Volts. The IC can count from 0 to 9 and that’s why we will use 10 output LEDs to make our circuit. Jan 24, 2024 · This is a new design of the classical LED Chaser Sequencer built with the combo ICs NE555 and CD4017. Components CD4017 decade counter 555 timer IC Ten-segment bar graph LED switch and One 6 volt battery 1 MΩ resistor 0. Also BOM for component values. In this article I’l… Apr 10, 2017 · I see that's just a Baby 10 sequencer with an added AND gate so you can use 16 steps instead of 10 or less like the original Baby 10 uses. Basic NE555 project of LED Light chaser. I've tried to cascade two 4017s Sep 25, 2025 · 1 x NE555+CD4017 Light Water DIY Kits Electronic suite Water lamp module Red. I breadboarded one a while ago with only 8 steps so it's much easier. Explore the versatility of CD4017 circuits and unlock endless possibilities for your electronic projects. Fully Assembled and Tested Installed LEDs are BLUE clear as shown in images. CD4017 is a Johnson 10 stage CMOS Decade counter IC. Oct 5, 2025 · NE555 & CD4017 LED Light Chaser / Sequencer / Follower / Scroller DIY KIT The LED Chasing Speed can be adjusted by the variable-resistor. Each output of this IC includes a buffer and can easily drive an LED. hoc 0bv 1j6 o2k5hx tb5q5ge zrolhwg zajml jwa9r6f ob5 kp90