200910 - Finger Bend Sensor

Finger Bend Sensor

Test bend sensor for finger to control LED Light.

190630 - Multi-Touchpad Playing Synth !

190630 - Multi-Touchpad Playing Synth !

I was able to generate sounds by touching / tapping / pressing each one of the touchpads.

View images below to see how the Paper Touchpad was made.

Tools: Arduino & openFrameworks

Challenge: Drum sounds created noise whereas the synth wav worked beautifully.

Fixed ! with an ‘if’ statement in openFrameworks, saying that ‘if the value is smaller then the current threshold && bigger then the previous && the current file is loaded, do not play !

teensy MIDI instrument

190611 - Apples MIDI Instrument

190611 - Apples MIDI Instrument

I’m playing sounds by touching apples. My first MIDI instrument thanks to my friend Khan who sent me this tutorial > http://little-scale.blogspot.com/2017/05/teensy-36-basics-touchread.html

I’m learning how to use MIDI with a Teensy microcontroller and Arduino to make a digital instrument.

2 bend sensors analog read arduino etextiles

190524 - Bend Sensor + Multi-Touchpad Read In Arduino and Visualized in openFrameworks

190524 - Bend Sensor Read In Arduino and Visualized in openFrameworks

2 Bend Sensors being visualized.

Reading serial in oF via ofxSimpleSerial to read both separate inputs.

In Arduino, I’m using the INPUT_PULLUP in order to use the internal 20k ohm resistor as a voltage divider.

A0 + A1 as analog pins for both sensors and the other Ground pins for the other side with the alligator clips.

I learned about creating matrices during Make Your Own Multi-Touchpad Workshop.

We read the serial values using vvvv, a commercial toolkit for visual programming, as well as Processing, a JAVA based language.

Since openFrameworks is my tool of choice, I used it to write an app to visualize Multi-Touchpads.

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voltage divider

190317 - Voltage Divider - Bend Sensor controls LEDs

190317 - Voltage Divider > Sensor to control LEDs

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The player above has 2 videos:

They show the tests of the bend sensor affecting the red led.

The first video uses a Flora board by adafruit.

In the second one, I am testing the ATtiny85 which ended up being the chosen microcontroller.

The sketchbook notes shows how the Voltage Divider works.

It ables me to turn the ohm changes from the sensor into voltage for analog reading by the microcontroller.

bend sensor

190316 - eTextile Bend Sensor


The process of making an eTextile Bend Sensor.

Conductive thread and fabric are used to capture the change in ohms from the bending.