8 Step Sequencer

After proving myself that I could build a 4 step sequencer, I decided to move further and put it on a prototyping board, this time with 8 steps, and start messing with MIDI parameters like Velocity and Gate.

Because time is that precious thing, and this is being done after labour hours, I just soldered jumper wires to the components going directly into the Arduino headers, I really wanted to start programming this thing.

Such a crazy setup also means that hardware debugging will be a nightmare, I guess I have absolute faith in my soldering and wiring skills :D I totally disencourage anyone to approach a project this way, but anyway, do as I say not as I do..

The following video shows a quick test drive. The arduino sends MIDI messages to an Axoloti Core through MIDI, witch is the instrument being played.


I’ve been playing with music tools for ages, most of my experiments are related to digital tools like MAXMSP, Propellerheads Reason, Ableton Live, and VST’s, but for the last year, I started to need to put the computer aside because I am very tired of computers. Digging on the internet for hardware DIY synthesizers I stumbled upon the Axoloti board. It’s a hardware PCB, where you can create your music instrument the way you want. Of course, you will need a computer to program the board, but once it is programmed it works standalone, has MIDI in and out ports, can act as MIDI USB host, SD card support, and it has a bunch of GPIO’s to add physical devices like sensors, buttons, potentiometers and LEDs.

As for the software side, depending on what you want to do, it is where you will need patching knowledge. You can create a sampler, a loopstation, a synthesizer, almost anything you can imagine it can be done with the Axoloti. Since I am not very keen to audio synth programming I feel limited in capabilities, so I use to dig in the forums for something related to what I want to do, and start from there. It also has a very extensive library with tutorials and user-contributed examples which is a great place to start.

Once you open a patch this is what it looks like, sometimes it will become messy, more like spaghetti in hell. Due to being a visually driven person, I tend to align objects in a visual manner, with equal spacing between objects and so, which tends to add complexification to the creative process.

Aside from this, the Axo board has a very crisp sound, and if you like to mess with frequencies, harmonics, sampling and modulation you will become quite addicted to it, that’s for sure!


BOTtle is a robot like many others but with a particularity, the wheels are made of plastic bottles as you can see in this video:

The components I will be using:

The servos are already attached to one another with double side-tape, I will show you how to attach the wheels to the servo horns

Start by adding wood self-tapping screws to the servo horn just a little in a way they won’t fall

Repeat this process 4 times

Open small holes in the exact place where the screws will be tight. I used a soldering iron.

Tight both screws to the wheels

Now I am placing the bumpers on the front of the bot on a PVC sheet (in this post you can see what I have done for a Sharp sensor)

And now the caster wheel, those screws tips are going to be cutted out

The screw tips are gone and added a bit of super glue because the PVC melted when cutting the screws

To attach the pvc base to the servos I am using double side rubber tape

And this is what I have done so far, more will be added soon (I hope)


PAPERduino’s design

This is a fully functional version of the Arduino. We eliminated the PCB and use paper and cardboard as support and the result is.. the PAPERduino :D

This is the the first version of the layout design, next we will try more designs, and another materials. You just need to print the top and the bottom layout, and glue them to any kind of support you want. We hope that you start making your own boards. If you do, please share your photos with us, we would love to see them  ;)

There is no USB direct connection, so to program the paperduino you will need some kind of FTDI cable or adapter. One of this products will be fine:
FTDI cable from Adafruit Industries
FTDI adapter from Sparkfun

Download PDF

Components list:
1 x 7805 Voltage regulator
2 x LEDs (different colors)
2 x 560 Ohm resistors (between 220oHm and 1K)
1 x 10k Ohm resistor
2 x 100 uF capacitors
1x 16 MHz clock crystal
2 x 22 pF capacitors
1 x 0.01 uF capacitor
1 x button
1 x Atmel ATMega168
1 x socket 28 pin
Female and Male headers

Use a needle to puncture the holes for your components.

Don’t rush, place one component after another and do all the solder work carefully.

Follow the connection lines.

And this should be the final look of your paperduino connections.

PAPERduino for ALL





http://www.freeduino.org/index.html (with 2 stars)



and more..