# What to do with a CD4026BE chip?

**URL:** <https://lookmumnocomputer.discourse.group/t/what-to-do-with-a-cd4026be-chip/5476>\
**Category:** DIY STUFF\
**Created:** [September 20, 2022, 7:54am UTC](https://lookmumnocomputer.discourse.group/t/what-to-do-with-a-cd4026be-chip/5476 "2022-09-20T07:54:41Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![popflier](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/popflier/32/80_2.png) [@popflier](https://lookmumnocomputer.discourse.group/u/popflier)\
**Post date:** [September 20, 2022, 7:54am UTC](https://lookmumnocomputer.discourse.group/t/what-to-do-with-a-cd4026be-chip/5476/1 "2022-09-20T07:54:41Z")

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I bought a chip from an Ebay seller a while back for one of Sam’s projects (the Twin T maybe?) The seller initially sent me a CD4026BE chip, which was wrong. He told me to just keep it instead of returning it. That is great and all except that I have no clue what could be created with this chip.

My question is what would you do with this chip? What can be done with this chip?

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**Author:** ![Plop](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/plop/32/11707_2.png) [@Plop](https://lookmumnocomputer.discourse.group/u/Plop)\
**Post date:** [September 20, 2022, 8:43am UTC](https://lookmumnocomputer.discourse.group/t/what-to-do-with-a-cd4026be-chip/5476/2 "2022-09-20T08:43:08Z")

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You can do a sequencer, a clock/frequency divider, and even if you clock it at audio rate you can do a wavetable oscillator =)  
There are many things to do with this chip

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**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\
**Post date:** [September 20, 2022, 1:43pm UTC](https://lookmumnocomputer.discourse.group/t/what-to-do-with-a-cd4026be-chip/5476/3 "2022-09-20T13:43:00Z")

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As I understand it, it’s kind of like a CD4017 but instead of 10 output pins that turn on sequentially as you clock it, it has 7 output pins intended for driving a 7 segment display. So what you get is a sequence of 10 distinct 7-bit patterns.

![image](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/1/4/14a22d79af2a1aa5e776625cf016abf87a32cb81.png)

Funky gate sequencer with 7 fixed-pattern outputs maybe? It’d have to be a 10-step sequencer unless you use external circuitry to send a reset every 8 (or whatever) steps. On the plus side you could easily have a display showing the step number.

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**Author:** ![EddyBergman](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/eddybergman/32/13513_2.png) [@EddyBergman](https://lookmumnocomputer.discourse.group/u/EddyBergman)\
**Post date:** [September 21, 2022, 11:03am UTC](https://lookmumnocomputer.discourse.group/t/what-to-do-with-a-cd4026be-chip/5476/4 "2022-09-21T11:03:20Z")

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It’s a 7 segment LED display driver chip. Loads of fun to be had with those. Just do a google search for circuits containing that chip.

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**Author:** ![Gasboss775](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/gasboss775/32/26802_2.png) [@Gasboss775](https://lookmumnocomputer.discourse.group/u/Gasboss775)\
**Post date:** [August 26, 2023, 10:21pm UTC](https://lookmumnocomputer.discourse.group/t/what-to-do-with-a-cd4026be-chip/5476/5 "2023-08-26T22:21:45Z")

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I realize this is from 11 months ago, but I just joined recently and seeingcthis reminded me of something I seen on the Electromusic Forum:

[7 segment decoder module](https://electro-music.com/forum/topic-68600.html)