# Matrix 12/Xpander display emulation

**URL:** <https://lookmumnocomputer.discourse.group/t/matrix-12-xpander-display-emulation/8111>\
**Category:** DIY STUFF\
**Created:** [March 14, 2026, 2:24pm UTC](https://lookmumnocomputer.discourse.group/t/matrix-12-xpander-display-emulation/8111 "2026-03-14T14:24:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![craigyb](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/craigyb/32/21602_2.png) [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\
**Post date:** [March 14, 2026, 2:24pm UTC](https://lookmumnocomputer.discourse.group/t/matrix-12-xpander-display-emulation/8111/1 "2026-03-14T14:24:17Z")

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This is another little display conversion project that I’m working on. The idea is to replicate the custom 40 character VFD displays of the Oberheim Matrix 12/Xpander synths in modern OLEDs. Early days yet and I just wanted to get the displays up and running. I was testing a serial connection which was producing garbage so eventually went with 4bit parallel to keep the pin count down. Yet to build the logic and interface it to the ESP-32 chips.

 ![1000020850](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/7/4/7471d6b3ab4c21d293742bbbd1101901e2bab085.jpeg)