This $20 synthesizer sounds very nice indeed

video upload by Floyd Steinberg

"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 [active links here]
Firmware can be found on Blaines' YT channel: @Synthetech
BlackPill STM32F411 board 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...

HÄLP ZIS CHANNEL
https://www.patreon.com/floyd_steinberg
https://floydsteinberg.gumroad.com/
https://floydsteinberg.bandcamp.com/"

Synthetech videos:

BP Synth.. a DIY Virtual Analog Monosynth

video uploads by Synthetech



BP-Synth Code Tutorials

video uploads by Synthetech

Additional videos on YouTube.

Black Pill (BP Synth) build.

video upload by Craig Barnes

"A reasonable description of my Black Pill synth build into an M- Audio Axiom 25 chassis with a Teensy 4.0 based editor managing the sounds.

The github page. https://github.com/craigyjp/Black-Pil..."

"I created a hardware editor for the BP Synth to specifically fit it into the M-Audio Axiom 25 chassis.

The synth was created by Blaine at SyntheTech about 3 years ago. [2nd set of videos here]

To Do list

Replace screen 0 with one the same as the others.

Clean the main screen display

Add the Portamento switch with an LED instead of the LFO wave select.

Connect the transpose buttons to the Teensy so I can manage the transpose.

Make the footswitch input assignable to Arp Start/Stop, Glide on/off etc."