OSKITONE OKAY Synth Manuale utente
© 2018 Oskitone
For
OKAY Synth DIY Kit
Version 1.1.1
http://www.oskitone.com/product/okay-synth-diy-kit
OKAY 2 Synth DIY Kit Version 2.1
http://www.oskitone.com/product/okay-2-synth-diy-kit
Last updated 2018-02-18
All rights reserved. This book or any portion thereof may not be reproduced
or used in any manner whatsoever without the express written permission
of the publisher except for the use of brief quotations in a book review.
http://www.oskitone.com/
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Hello!
Thank you and congrats on your new OKAY DIY Kit!
Please let me know how it goes, what you think, and/or if you run
into any trouble. Reach me at [email protected].
You can also find last minute guide updates, extra assembly
information, and videos at http://www.oskitone.com/guides
Otherwise, good luck, take your time, and have fun!
-Tommy
Hey, OKAY!
The OKAY is a monophonic, analog, square-wave synthesizer.
It is intentionally minimal.
●Monophonic: Only one note at a time can be played.
This is opposed to “polyphonic,” where multiple
simultaneous notes can be played.
●Analog: There are no computers, microcontrollers,
sound samplers, or anything digital involved. The sound
you hear is the sound of a speaker being abused by
discrete electronic components like capacitors and
resistors and logic chips.
●Square-wave: When its output is viewed on an
oscilloscope, its wave resembles a square. It’s a “hard”
sounding wave type, great for bass lines, and
commonly associated with chiptune music and old
video games
OKAY versions
There are two versions of the OKAY:
●OKAY 1
(Also just called “OKAY” since it came out first)
One octave of keys (13 keys)
●OKAY 2
Two octaves of keys (25 keys) and ¼” audio out jack
This assembly guide is for both versions. Instructions that are
specific to one version and not the other will be noted.
Table of Contents
1. 3D-Printing instructions
a. Slicing
b. Post-printing
2. What’s in the box
a. Inventory
b. Tools (not in the box)
3. Enclosure assembly
4. PCB assembly
a. General tips
b. Connecting wires
c. Wiring diagram
d. 386 0.1.1
i. Wiring the ¼” jack (for OKAY 2 only)
e. 555_4040 01.1.1
i. Wiring the rotary switch
f. bus 0.1.1
i. Polarity on middle pads
g. SPST_VR 0.2.2
i. Wiring for OKAY 2
5. Putting it all together
a. Testing and debugging
b. Final assembly
c. Tuning
d. Care
6. Appendix: Circuit schematics
3D-Printing instructions
If you bought the kit with the 3D-printed parts included, you
can skip this part!
Slicing
Normal .2mm layer height is fine.
Part
Supports
Infill
Color change
Bottom
Build plate only
Normal
n/a
Top
No
Normal
n/a
Hinge parts
No
Normal
n/a
OKAY hold-in
No
Normal
n/a
Keys
No
Light
12.8 / 13.8 ***
Key plungers
No
Normal
n/a *
Speaker
No
Normal
5.4
Labels
No
Normal
6.4
OKAY text
No
Light
9.8 / 9.4 ***
Knobs
No
Normal
18.4
Key cradle
No
Normal
n/a **
* key plungers are only for OKAY 1
** key cradle is only for OKAY 2
** first value is for OKAY 1, second is for OKAY 2
Refer to http://oskitone.com/guides for additional instructions.
Printing
●The enclosure models are pretty big and so can be
prone to warping or curling up from the print bed over
time. Minimize that risk by using a filament with low
shrinkage like PLA and ensuring good bed adhesion.
●The keys have hinges that fragile. Remove them gently
with a scraper tool if they’re stuck to the bed.
Post-printing
1. Clean up strings
a. Cut or melt away any stringing. Be careful not to
scratch dark filament underneath text
embossing
2. Remove built-in supports
a. Break built-in bridge supports from each PCB
post with a small screwdriver or other stabby
object
b. For the OKAY 2, do the same for the key cradle
3. Knobs
a. Cut built-in bridge support from bottom to
expose shaft cavity
b. One knob has a hole in its side. This is a cavity
for the brass threaded insert, which you’ll lock
into place by inserting with a hot soldering iron
What’s in the box
Inventory
●PCB kits
○bus 0.1.1
○555_4040 0.1.1
○386 0.1.1
○SPST_VR 0.2.2 15
○
OKAY 2 upgrade parts (only if OKAY 2)
●3D-printed parts
○Bottom
○Top
○Hinge links (4)
○Latches (2)
○Key overlays
○Key plungers (13)
(OKAY 1 only)
○OKAY text
○OKAY text hold-in tab
○Speaker grill
○Knobs (2: 1 w/ tension screw, 1 w/o)
○Knob labels
○
Key cradle (OKAY 2 only)
○Filament (7”)
●Miscellaneous
○4-40 ¼” screws
■
OKAY 1: 16 / 17*
■
OKAY 2: 6 / 7*
○4-40 ⅜” screws
■
OKAY 1: 0
■
OKAY 2: 23
○4-40 hex nuts
■
OKAY 1: 16
■
OKAY 2: 29
○Twisted 2-conductor wire
■
OKAY 1: 33”
■
OKAY 2: 38”
○
Threaded brass insert *
* If you’re 3D-printing the parts yourself, your kit will come with an extra ¼”
screw and one threaded brass insert.
Tools (not in the box)
You’ll also want to confirm you have these tools
●Required
○Soldering iron and solder
○Wire cutters or diagonal cutters
○Needle-nose pliers
○Philips screwdriver
○Precision flathead screwdriver
○Chromatic instrument tuner
○Elmer’s glue
○9v battery
○Ruler for measuring wire
●Recommended
○Multimeter for debugging
○Wire stripper
○PCB vice or “helping hands” holder
○“Solder sucker” or desoldering braid
○Tweezers or “dentist’s tools” for working with
small components
○Hot glue
○Zip ties for tidying up wires
○Utility knife
○Jumper wires, alligator clips, and an assortment
of different resistors, capacitors, and
potentiometers for experimentation
Enclosure assembly
1. Back hinges
a. With one hand, hold an anchor link into its
cavity on the enclosure bottom
b. With the other hand, thread filament through
holes
c. Repeat for all hinge links, cutting filament with a
small amount of slack (maybe 1/16”)
d. Put the enclosure top on, and repeat
2. Front clasps
a. Just like you did for the hinges on the back,
thread the clasps onto the front with filament.
There are no separate link parts
3. OKAY text
a. Place the OKAY text into its place on the
enclosure top
b. Secure its underside with the hold-in tab
4. Keys
a. For the OKAY 1:
i. Pull the key overlays in through the top
of the enclosure and affix onto the row
of dovetails. Gently push into place
ii. Using a smalls screwdriver in its holed
tabs, pull the keys more securely onto
the enclosure top
b. For the OKAY 2:
i. You’ll first need to solder the SPST_VR
PCBs, so skip this part for now and
follow assembly instructions later.
5. Key plunger pegs
(for OKAY 1 only)
a. With the lid open and the key underside facing
up, carefully drop a small amount of glue into
each of the peg cavities
b. Gently twist each peg into its cavity
(The plastic on these pegs is thin and fragile. If
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