"Scratch Ninja" 3-inch platter MIDI controller for scratch DJs

I created a MIDI controller that can be used with djay (paid subscription required)

You can practice scratching with songs in djay

Since I went to the trouble of introducing a buzzer, I also added a mode that allows scratching with the buzzer

I have no knowledge of programming

I only learned how to create 3D data while playing around

Nevertheless, it has become a good era where such equipment can be made with the help of AI

[Documents]

Documents created by AI

[Pre-cautions]

・A djay subscription is required

・Soldering skills are required

・Operation has only been confirmed on iPad and iPhone

・Feel free to create one for personal use

・If you wish to sell it, it will be after a commercial license is acquired

(Please follow me, etc.)

・Feel free to modify the data, etc

・Program data, etc., were created by AI

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[Table of Contents]

・Output 3D printed parts

・Assembly

・Assemble the circuit board

・Write program to Arduino Pro Micro

・Load djay mapping file

・Required parts

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[Output 3D printed parts]

※-The platter part must be made with conductive PLA

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[Assembly]

Create and install screws for cut lag adjustment (screws should be about M2 x 10mm)

Attach a magnet to the bottom of the fader M3 x 2mm

If you need to adjust the fader weight, prepare this

If you dislike it being too slippery, insert fake leather or similar as a non-slip material and install an M2 x 2mm grub screw for sensitivity adjustment

Fix using the side blocks

Install the cut lag adjustment screw

Create shuriken throwing parts

If it comes off easily, secure it with adhesive

If you press the button and it pops out, it's OK

Install playback buttons, etc

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[Assemble the circuit board]

Use a carving knife or similar

Between I-J

6,9

(Change: do not connect 14)

Both sides will be grounded

Now install the parts

Although a normal OFF→ON switch might also work, this one has a shorter operating time

Cut the longer wire

Please be aware that the glass is very fragile

Wiring is as follows

B1-2: Glass reed wire to GND

E9-16: Glass reed wire to A2

E10-15: Button to A3

F2-4: Glass reed wire to 8

F7-15: Button to 5

I16-17: Glass reed wire to GND

I1-J6: Button to GND

I5-J9: Button to 7

(Change: H6-J14 not connected)

A reverse switch is also installed here

Install the switch at C-D1 and connect to E4

Install the Pro Micro

Install these three parts

・AS5600: Part to read rotation

・Touch sensor: Detects touch (Change: not used)

・EC11: Rotary encoder with button

First, AS5600

One cable is sufficient for VCC and GND

Connect AS5600's GND to EC11's GND

From EC11 to board's GND

Wire to the board

AS600

SDA 2

SCL 3

GND GND (via EC11)

VCC VCC

IC11

Phase A (left of 3 pins): 14

Phase B (right of 3 pins): 15

Button (right of 2 pins): A1

Left of 2 pins: GND

Middle of 3 pins: GND

Touch

Connect to A0 pin with a 1MΩ resistor in between

Buzzer installation

Prepare a passive buzzer and an NPN transistor

(Transistor amplifies the sound)

The connection is as follows

Passive buzzer plus to VCC

Passive buzzer minus to NPN transistor B (middle)

Transistor E (right) to 6

Transistor C (left) to GND

The transistor was directly connected to the buzzer

Arrange it like this

The sound is quite loud, so please adjust the volume by covering the hole with tape, etc

Fix the AS5600 with wood screws of about M2 x 6mm

(About 2 screws are sufficient)

Touch sensor installation

Make the part for attaching the 1MΩ resistor like this

Cut the copper foil to match the outer groove

Insulate the resistor part with masking tape, etc

Wire from the 1MΩ resistor to pin A0

If the JOG is too light, it can lead to malfunctions, so install a brake

Cut about 1cm of TPU filament and insert it

Insert it here

Install an M2 x 10mm screw here to adjust the JOG's weight

Platter installation

Attach a magnet to this part

Snap it into place

Please also attach clear TPU to this hole on the bottom

If the hole is small, please widen it slightly

Install with M2 x 6mm wood screws

Attach non-slip material to the bottom

(Still looking for good non-slip tape for this part)

[Write program to Arduino Pro Micro]

Write data to the circuit board

https://www.arduino.cc/en/software/

Please download the Arduino IDE from here (I used Ver 2.3.8 during creation)

After launching, copy and paste "Scratch Ninja Final" from the documents section and save it

It might prompt you to install something, so please install the program in the Arduino IDE if that happens

• Encoder
• AS5600
• Control Surface
• ADCTouch

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[Load djay mapping file]

Download "Scratch Ninja MIDI Map.txt" uploaded in the documents section

After changing the extension from .txt to .djayMidiMapping, place it in the specified djay folder

(Because I couldn't upload the file no matter what)

iOS

djay/User Data/MIDI Mappings

In my environment, it was in the following djay folder

Mac

~/Music/djay/MIDI Mappings/

Win

%LOCALAPPDATA%\\Packages\\algoriddim.djay-pro-windows_v167e8xyv2yde\\LocalState\\Algoriddim\\djay Pro\\MIDI Mappings\\

Now, I believe it should work when you launch djay

Alternatively, select the mapping file