yulquen / kicadje_moogvcf

3 yusynth implementations - MoogVCF - WaveFolder - 555 ADSR

KicadJE_MoogVCF

Based on https://www.yusynth.net/Modular/Commun/MOOGVCF/Moogfilter-sch.jpg

Based on https://www.yusynth.net/Modular/Commun/WAVEFOLDER/new/JHWavefolder-sch.gif

Based on https://www.yusynth.net/Modular/Commun/ADSR/ADSR555-FINAL.gif

Status - PCB in the mail

Initial

Stage	Detail	Status
create material	sch/pcb	OK
	gerber	OK
production		Ok
	produced	OK
	delivered	Ok

Preliminary validation

Test	Detail	Status
Initial Inspection		OK - silk messed a bit
Initial Technical Test	VCF	CV2 signal issue round Jack
Initial Technical Test	ADSR	OK
Initial Technical Test	WaveFolder	OK
Initial Product Test	VCF	Not working due to missing Caps
Initial Product Test	ADSR	OK
Initial Product Test	Wavefolder	Works nicely

Secondary validation

Test	Detail	Status
Product Test	CF	VCF - working ok after botch'ed caps added - no self osc
Product Test	ADSR	Works fine after added 100k resistors instead of 0R across 100KB pots
Product Test	Wavefolder	nice - no adjustments
Quality	VCF	Needs tweaking
Quality	ADSR	ADSR interacts when turned all the way down
Quality	Wavefolder	Nice
Long Term Product Test
Power Draw	VCF	24mA
Power Draw	ADSR	mA
Power Draw	Wavefolder	7mA

Errata

Errata - VCF

• Missing signal path for CV2 on PCB
• Missing 2 caps from C207 to R226/227

Issues and Notes

VCF

• C214 should be 1206 (its a bit difficult to find 22u 0805 in 16v)
• C211 and C212 should be 1206 or bigger (10u 16v potentially sounds better than 0805)

Pictures

Inspiration

Schematic

Ladder Filter

Simple 555 ADSR

WaveFolder

Inspiration

http://jhaible.com/legacy/jh_shaper_B.pdf

https://www.yusynth.net/Modular/Commun/WAVEFOLDER/new/JHWavefolder-sch.gif

https://www.yusynth.net/Modular/Commun/MOOGVCF/Moogfilter-sch.jpg