DIY - mwicat/personal GitHub Wiki

Guitar pedals

• wiring - https://www.coda-effects.com/2016/08/ultimate-guide-to-guitar-effect-wiring.html
• tips - https://www.coda-effects.com/p/tips.html

Multiplexer

https://www.notesandvolts.com/2016/07/arduino-midi-controller-multiplexers.html?m=1&fbclid=IwAR2FRKymaw2-SDKUHznDLfe0LnbAYAp2MPdfJ5pyA5yL78LHGqCqjy2RlHE

Circuit design

circuit editor

sudo apt install kicad

VCA

• THAT 2150 - http://www.thatcorp.com/datashts/THAT_2150-Series_Datasheet.pdf

veroboard editor

• https://github.com/bancika/diy-layout-creator/releases/tag/v4.14.0

Capacitor

Circuit simulation

• https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html (offline)
• https://www.falstad.com/circuit/ (online)

Vactrol

https://www.digikey.pl/product-detail/pl/advanced-photonix/NSL-32SR3/NSL-32SR3-ND/5039793

https://www.allaboutcircuits.com/textbook/experiments/chpt-3/rheostat-range-limiting/

https://sound-au.com/

Overdrive Distortion

Big muff

• http://www.kitrae.net/music/big_muff_guts.html

PT2399

• https://www.petervis.com/guitar-circuits/pt2399/overall-configuration.html
• https://diyaudiocircuits.com/pt2399-digital-delay-analog-echo/
• https://www.electrosmash.com/pt2399-analysis

Symmetric/negative voltage

• complementary negative for guitar pedal - ICL7660S

• http://tagboardeffects.blogspot.com/2013/02/ne555-voltage-inverter.html

• https://electronics.stackexchange.com/questions/472025/how-are-symmetrical-voltage-supplies-obtained-in-a-final-standalone-design

• https://www.reddit.com/r/synthdiy/comments/azuw9j/is_it_possible_to_power_a_eurorack_module_with_a/

• https://allegro.pl/oferta/przetwornica-napiecia-symetrycznego-12v-dc-dc-8923796614

• https://allegro.pl/oferta/przetwornica-napiecia-symetrycznego-reg-3v-do-30v-9342378578

• Przetwornica Inwerter napięcia ICL7660S 7660 DIP8

Offset voltage

https://electronics.stackexchange.com/questions/275136/how-to-get-5-to-5v-with-ad5668

Mic preamp

• http://www.tangible-technology.com/ipr/AE230/html/wk_6/hamptone_fet_scan.pdf

Filters

https://www.eddybergman.com/

m20

37w x 30h

24db/oct

• https://electricdruid.net/cem3320-filter-designs/

• https://electricdruid.net/product/as3320-vcf/

• https://syntaxis.com.pl/pl/filtry-sterowane-napieciem/11-as3320-vcf.html

• https://www.eddybergman.com/2019/12/synthesizer-build-part-6-prophet-5.html

• https://www.eddybergman.com/2020/03/synthesizer-build-part-23-digisound-80.html

• http://www.learningaboutelectronics.com/Articles/Low-pass-filter.php

• http://www.ericarcher.net/wp-content/uploads/2014/07/9v-analog-diy-lpf.pdf

• https://hackaday.com/2017/03/29/dont-fear-the-filter-cascading-sallen-keys/

• http://www.midimanuals.com/manuals/paia/ekx-20_exponential_voltage_controlled_filter/assembly_instructions/ekx-20_200dpi.pdf

• http://guitar-fx-layouts.42897.x6.nabble.com/Korg-MS20-LP-HP-Filter-td31433.html

Voltage controlled resistor

• transistor current sink - example with pt2399 - http://sdiy.org/destrukto/vc-echo.html

• opamp current sink - https://circuitdigest.com/electronic-circuits/design-a-simple-constant-current-sink-circuit-using-op-amp

• photoresistor to voltage divider - https://www.societyofrobots.com/schematics_photoresistor.shtml

• transistor, photo fet, vactrol - http://www.midibox.org/dokuwiki/doku.php?id=midiboxfx_-_midifiying_analog_gear

• fet - https://www.edn.com/a-guide-to-using-fets-for-voltage-controlled-circuits-part-1/

• https://store.synthrotek.com/Vac_Pak_Kit

• https://donotfuckup.home.blog/2019/03/09/how-to-add-voltage-control-to-an-ehx-cathedral-clarifying-the-muff-wiggler-thread/

NSL-32sr3 (PL) VTL5C1

https://sound-au.com/project200.htm

CV control

• How to add offset - http://familjenronnberg.se/~niklas/diy/eurorack/cv-tools/
• Expression pedal to cv - http://blackaddr.com/expression-pedal-repair-and-mod/

Arduino

• https://github.com/tttapa/Control-Surface
• http://thenorthwestenterprise.com/2018/05/10/ardruino-diy-midi-controller-for-cubase/
• https://www.youtube.com/watch?v=5QBeKaVrWzw
• https://medium.com/@monkeytypewritr/building-your-own-midi-fighter-406948137f8f

Piezo

• http://scotthelmke.com/Mint-box-buffer.html
• https://www.richardmudhar.com/blog/using-piezo-contact-mics-right/
• https://knowledge.lom.audio/research/contact_mics

Power supply

• https://github.com/vaeinoe/moraydular/tree/master/my_little_euro
• https://wired.chillibasket.com/2020/06/dual-power-supply/

Eurorack

• specification - http://www.doepfer.de/a100_man/a100m_e.htm
• screw = M3
• faceplate height = 128.5mm
• screw hole = 128.5 - 3mm
• pcb height = 10cm (39 stripboard holes) 11cm (43 stripboard holes)
• stripboard dimensions - 55 horizontal, A-X vertical