I upgraded a scrapyard controller panel from the 90ies with an esp32s3 audio board to make a synth/sequencer/mod-player and had a lot of fun.

Try coupon code "boardluni" at https://aisler.net (sponsor)
Sprite_tm panel driver: https://github.com/Spritetm/mn812_module

0:00 Intro
0:17 Scrapyard find
1:01 Reverse engineering
1:56 Board design
3:28 PCB Assembly
4:33 First test
5:24 Sigma-delta audio
5:55 Audio amplifier
6:52 Sequencer dev
7:52 MOD-Player
8:37 Conclusion

MODs (rather butchered than) played:
Steffen Nicolaisen - Submariners
Rob Hubbard - Zoids
Wouter van Leeuwen - Haste

Links to parts and tools (affiliate links):
Preheating Station ($50): https://aliexpress.bitluni.net/heatin...
Tweezer set ($8): https://aliexpress.bitluni.net/tweezers
Low Temp Solder Paste ($3): https://aliexpress.bitluni.net/lowTem...
SMD Resistor Set ($9): https://aliexpress.bitluni.net/RSet
Electrolytic Capacitor Set ($14): https://aliexpress.bitluni.net/elecCaps
SMD Ceramic Capacitor Set ($17): https://aliexpress.bitluni.net/smdCaps
Colorful Pin Header: https://aliexpress.bitluni.net/pinHeader
Colorful Pin Socket: https://aliexpress.bitluni.net/pinSocket

My camera and lens (4k 60fps): https://amazon.bitluni.net/gh5
Zoom H6 Audio Recorder: https://amazon.bitluni.net/h6

plz share :-)

Github Sponsors: https://github.com/sponsors/bitluni
Patreon:   / bitluni  
Channel membership:    / @bitlunislab  
Paypal: https://paypal.me/bitluni

Twitter: @bitluni
reddit: u/bitluni
Discord:   / discord  

#electronics #maker #synth