CLOCK DIVIDER & MULTIPLIER

Original schematic and other information: sound-force.nl

CHANGING RATIO

Simply change the numbers if you want to change the ratios.

STRIPBOARD LAYOUT

-100nF, decoupling capacitor is soldered next to PCF8574, not underneath the board.

-Those ugly looking octopuses are actually RGB leds (PL9823).

-When you upload the sketch, you should install the libraries first. Without them, it won't work.

FACEPLATE LAYOUT

8hp (40mm x 129mm)

It's actual size so you can use it as a drilling template.

3.5mm jack : 6mm

SPDT toggle switch : 6mm

PL9823 led : 5mm

mounting screw : 3mm

stand-off : 3mm

ORIGINAL SCHEMATIC & OTHER INFORMATION: YUSYNTH

STRIPBOARD LAYOUT

1

2

FACEPLATE LAYOUT

This layout is actual size, so you can use it as a drilling template.

3mm : LEDs & mounting screw holes

6mm : 3.5mm jacks & DPDT toggle switch

7mm : Potentiometers

SWITCHED MULTIPLE

WIRING DIAGRAM

FACEPLATE LAYOUT

MFOS State Variable VCF

Original Schematic and other information: musicfromouterspace

STRIPBOARD LAYOUT

All decoupling capacitors, 100nF are soldered underneath the boards. Solder the caps across V+ and V- of each ICs.

FACEPLATE LAYOUY

It's actual size so you can use is as a drilling template.

3mm holes : mount screw holes

6mm holes : 3.5mm jacks

7mm holes : potentiometers 

ORIGINAL SCHEMATIC & OTHER INFORMATION: birthofasynth

STRIPBOARD LAYOUT

Original circuit uses LF442 and LM394 for the exponential converter. As you know, LM394 is obsolete and LF442 is hard to find these days, so I substituted LM394 with a matched pair of 2n3904s and LF442 with TL072. I have no significant issues so far.

'SKEW MODIFICATION'

The 'Skew' does nothing until it passes 12o'clock. If the 1st pin of 'Skew' potentiometer is connected to '-3v' instead of '-12v', it starts morphing the wave once you turns the knob. So I added a simple voltage divider as you can see above.

FACEPLATE LAYOUT

The dimension is 30mm(6hp) x 129mm

7mm hole : potentiometer (6ea)

6mm hole : 3.5mm jacks (7ea)

6mm hole : DPDT On-On toggle switch (1ea)

3mm : mounting screws

MEASUREMENT

Sine wave output: 9.99Vpp

Triangle wave output: 9.55Vpp

Pulse wave output: 9.95Vpp

Frequency range: 0.35Hz ~ 20.9KHz

Skewed triangle wave

Skewed sine wave

Original schematic, BOM and information: LINK

STRIPBOARD LAYOUT

Three of Twin-T. Each one has different value of capacitors, normally higher value you put, lower frequency you get. I ended up selecting 470nF, 100nF and 22nF, however it's worth trying different value to meet your taste. And led also changes the tone depending on its color. 

All decoupling capacitors, 100nF are soldered underneath the boards.

FACEPLATE LAYOUT

6hp faceplate layout. The dimension is 30mm x 129mm.

It's actual size so you can use it as a drilling template.

Potentiometer: 7mm

3.5mm jack: 6mm

Mounting screw: 3mm

MFOS VC LFO with Sync Input Modification

Schematics& BOM

MFOS VC LFO : LINK

Sync Input Modification : LINK

STRIPBOARD LAYOUT

-All decoupling capacitors, 100nF, are soldered underneath the boards.

-I decided to add 'Sync Mod' after LFO circuits were done, so I attached Sync Mod circuit underneath the lowest the board.

FACEPLATE LAYOUT

-The layout is actual size, so it can be a drilling template.

<Hole Diameter>

Potentiometer: 7mm

3.5mm jack: 6mm

LED: 3mm

Screw hole: 3mm

MEASUREMENT

..

MFOS LOG& LIN VCA

Original schematic: MFOS

STRIPBOARD LAYOUT

-All de-coupling capacitors, 100nF, are soldered underneath the boards.

-To reduce the depth of a module, I attached the board LM13700 is placed behind other two boards by using jumper pins like the pic above, which is a little bit tricky but not that hard to do.

FACEPLATE LAYOUT

The layout is actual size so you can use it as a drilling template.

-Potentiometer : 7mm

-3.5mm jack : 6mm

-Toggle switch : 6mm

-Screw hole : 3mm

THOMAS HENRY CMOS ADSR

Original Schematics: LINK1, LINK2

STRIPBOARD LAYOUT

-All diodes are 1N4148

-555 timer chip should be CMOS one like TLC555

-All decoupling capacitors, 100nF are soldered underneath the boards, so I omitted them on the layout.

FACEPLATE LAYOUT

-This layout is actual size so it can be used as a drilling template.

Potentiometer hole = 7mm

3.5mm jack hole = 6mm

SPDT toggle switch hole = 6mm

mounting screw hole = 3mm

This module is MFOS Echofxxx.

Original schematic and BOM: MFOS

STRIPBOARD LAYOUT

-D1 & D2 = 1N5231

-D3 & D4 = 1N914 or 1N4148

-100nF, Decoupling capacitors are soldered underneath the boards, so I omitted them in the layout

FACEPLATE LAYOUT

The dimension is 40mm x 129mm.

The layout is actual size so you can use is as a drilling template

-Pot hole: 7mm

-3.5mm jack hole: 6mm

-Screw hole: 3mm