This $20 synthesizer sounds very nice indeed

BPSynth is a #diy monophonic #virtualanalog #synthesizer based on a STM32F411 "BlackPill" microcontroller created by @Synthetech . In this video, I show which parts you need, where to get them and how to assemble them, plus some sound impressions. Table of contents:

00:00 short demo
00:07 hi
00:30 parts needed
00:58 were to get and how to install the firmware
02:23 building the BPSynth
04:20 building the MIDI jack
06:50 important considerations
07:14 set up a MIDI controller
07:39 synth engine overview
08:07 demonstation track
11:14 conclusion

Resources
Firmware can be found on Blaines' YT channel: @Synthetech
BlackPill STM32F411 board (I bought the F411 25M HSE) https://de.aliexpress.com/item/100500...
UDA 1334A DAC module https://de.aliexpress.com/item/100500...
5pin midi socket https://de.aliexpress.com/item/330301...
6N137 optocoupler https://de.aliexpress.com/item/100500...
220 and a 10k ohm resistor https://de.aliexpress.com/item/100500...
1N4148 diode https://de.aliexpress.com/item/100500...
Jumper wires https://de.aliexpress.com/item/100500...
Breadboard https://de.aliexpress.com/item/100500...
Electronic component tester and identifier https://www.amazon.com/-/de/dp/B0BK95...

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Here's what I have in my setup at the moment. Want to have that, too? Please use the followings links and support me:

Yamaha EX5 https://www.ebay.com/sch/i.html?_nkw=...
Kasser Synths Arcade https://www.tindie.com/products/kasse...
Intech GRID: https://intech.studio/
MPC One, Novation PEAK, Reface DX, Source Audio Collider, Strymon Iridium, Zoom MS 70 CDR, Donner N-25, Akai EWI USB, Zoom R20, Zoom H5, Yamaha MT7, Roland Aira:
https://www.thomann.de/de/thlpg_3wyep...

Some bands / artists I've been following for a long time are (among others) Massive Attack, Pink Floyd, Pet Shop Boys, Archive, A-Ha, Yes, Porcupine Tree, John Mellencamp, Jean-Michel Jarre, Metallica, Peter Gabriel and Perturbator. So my music will kind of sound like those (without ever reaching the greatness of those artists, of course). :-)