Friday, 29 November 2019

DIY TRAKTOR Loop Controller - PART 1

I recently got a TRAKTOR S4 MkIII so I could do some live music production on my Twitch streams. The Traktor software has a Loop Recorder included but unfortunately, Native Instruments removed the loop controls on the MkIII. No big deal, we'll build our own!

I call this project the LOOP-R and it allows you to easily access all the loop recorder commands with the push of a button. Watch the video to learn how to build your own on a breadboard.

Download the code and schematic HERE

Parts List: (With Amazon Links)

1 - Teensy LC (With pins)
5 - Push Buttons (Momentary - Normally Open - 12x12)
1 - LED (Red)
1 - 330 Ohm Resistor
1 - 10K Potentiometer (Linear - Center Detent)
2 - BreadBoards
1 - Phone Jack (Mono - 1/4")
1 - Foot Switch (Normally Open)
Jumper Wires (Assorted)

Sunday, 31 March 2019

TWITCH Bench Display with GetInTouch

As some of you may know, I have a Twitch Channel where I hang out when I'm working in the Lab. During one of my streams I met a couple of really nice German guys who are the creators of the GetInTouch extension for Twitch. I was very impressed with the Arduino Library they created that can easily connect an Arduino to your Twitch channel.

After playing around for a while I came up with a LCD Bench Display that allows viewers to send messages during the stream. As a bonus, it plays some preset messages when it's not in use. Free advertising! So in this episode I'll show you how to build your own.

You can download the code and schematic HERE
Download the 3D printable enclosure at my THINGIVERSE page

Parts List: (With Amazon Links)

1 - LCD Display (40x2 - 5 Volt - No Header)
1 - Arduino Nano (With headers)
1 - Adafruit Perma-Proto Half-Sized PCB
1 - Piezoelectric Speaker (30mm diameter or less - NO Driver Circuit)
1 - Trimmer Potentiometer - 10K ohm
1 - 330 Ohm Resistor
1 - 100 Ohm Resistor

12 - M3 x 6mm Screws - (Plastic Black)
6 - M3 x 10mm Standoffs - (Plastic Black)

Wire - (30 AWG - Stranded)
Wire - (22 AWG - Solid)

Thursday, 28 February 2019


After a lot of long nights in the lab I have finally finished the enclosure for the TEENSY-Synth! This was a challenging build and I had to pick up a few new tricks along the way, but I'm really happy with the way it turned out.

Download the files for this project HERE

Here are the exact parts for this project and where I purchased them.

Parts List:

Mouser Electronics

1 - Enclosure: Hammond 1590DDBK
15 - Potentiometers: 652-PTV09A-4025FB103
15 - Knobs: 450-4760
1 - USB Connector: 523-UE27-BC54-130
1 - 6N138 Optocoupler: 782-6N138
1 - Midi Jack:161-0005-E
1 - 1n4148 Diode: 512-1N4148
1 - 74HC4067 Multiplexer: 595-CD74HC4067M96
1 - LM7805 Regulator: 926-LM7805CT/NOPB
1 - 1N4001 Diode: 863-1N4001G
1 - 100uF Electrolytic Capacitor: 140-RGA101M1EBK0611G
1 - 10uF Electrolytic Capacitor: 80-ESK106M035AC3AA
1 - 220 Ohm Resistor (1/4 Watt): 603-CFR-25JR-52220R
1 - 470 Ohm Resistor (1/4 Watt): 603-CFR-25JR-52470R
2 - 0.1uF Capacitor: 594-K104M15X7RF53L2


3 - Toggle Switch: SPST
1 - Barrel Jack: 2.1mm
1 - 1/4" Jack: Mono TS
4 - M3 Standoff: 10mm
8 - M3 Screw: Button Head 5mm

Wednesday, 30 January 2019


In this episode we are going to add Potentiometers and Switches to the TEENSY-Synth with the help of a 74HC4067 Multiplexer.

Download the example code and schematic HERE

Parts List: (Amazon Affiliate Links)

1 - 74HC4067 Multiplexer (Do NOT get the 74HCT4067 version)
(NOTE: The DIP package of the 74HC4067 seems to be going away. If you want to experiment with this circuit on a breadboard you can use a breakout board like this one from SparkFun)

3 -  SPST toggle switches
15 - Potentiometers - 10K - Linear Taper
1 - 5 Pin Midi Jack
1 - 6N138 Optocoupler
1 - 1n4148 Diode
1 - 220 Ohm Resistor (1/4 Watt)
1 - 470 Ohm Resistor (1/4 Watt)
Hook-up wire

Power supply circuit (optional)
1 - Barrel Jack - 2.1mm
1 - LM7805 Regulator
1 - 1N4001 Diode
1 - 100uF Electrolytic Capacitor
1 - 10uF Electrolytic Capacitor

Friday, 30 November 2018


So, I know I said that the TEENSY-Synth project was over. But, I have been receiving so many requests, suggestions, and videos from people who have been inspired by this project - I think it deserves a little more attention.

Many people have been asking for a fully self-contained, hardware version of the synth so that is what we will do! The first step is to add a 5-Pin Midi jack to the synth so it can be easily connected to older synths and sequencers.

Download the example code HERE

Parts List: (Amazon Affiliate Links)

1 - 5 Pin Midi Jack
1 - 6N138 Optocoupler
1 - 1n4148 Diode
1 - 220 Ohm Resistor (1/4 Watt)
1 - 470 Ohm Resistor (1/4 Watt)
Hook-up wire

Tuesday, 11 September 2018


In this episode we will add an LFO to our TEENSY-Synth. This low frequency oscillator can be set to control the pitch of the note or the filter frequency.

Download the example code HERE

Monday, 13 August 2018


In this episode we will add Pitch Bend to the synth. To properly understand  pitch bend messages we will look at the bits and bytes of the Midi language. If you are unfamiliar with Binary numbers you can get a quick primer by watching: MIDI for the Arduino - Understanding MIDI Language

Download the example code HERE