Monstrous casio keyboard circuit bend project

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Monstrous Casio Keyboard Circuit Bend Project

description

This is a presentation showing the commission project I produced for Hannes Pasqualini from Paper Noise. If you would like one similar or have any other equipment you would like modifying, please contact me.

Transcript of Monstrous casio keyboard circuit bend project

Page 1: Monstrous casio keyboard circuit bend project

Monstrous Casio Keyboard

Circuit Bend Project

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Commission Specifications

Commissioned by Hannes Pasqualini from Papernoise

Modify a Casio VL-tone to include:

• A low pass filter

• Two audio oscillators, with patch bay

• Voltage starve

• As many circuit bends as possible

• Mounted in a customised wooden case

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Selecting a box

I had a selection of boxes in my workshop, luckily I managed to find the exact size box that didn’t need many modifications.

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Top Panel Demo

A wooden insert panel was made using ply wood and cut to size with a disc saw. The knobs were used to keep a scale of perspective. The gap around the edge of the keyboard is 1mm.

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PATCH BAY

MOD 1

MOD 2

CIRCUIT BEND 1-11

POWER

AUDIO OUT

ON/OFFRESET

PITCH 1 &2MOD 1PITCH MOD 2 PITCH

1&2

Panel Demo Design

I made a quick sketch using word to show how the insert panel would look.

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Panel Design

OSCILLATOR A

MODULATION

PITCH A Pitch B RESET

OSCILLATOR B PITCH

POWER

FEEDBACKOSCILATOR BOSCILATOR A L.P.F.

FREQUENCY

OSCILLATOR A

PITCH

STUTTER FOLLOWER BASS FOLLOWER

OSCILLATOR A

OSCILLATOR B

BASS STUTTER

The panel design was finalised in power point, the page size was set to the same size as the panel. The file was converted to 16-bit BMP format with the colours inverted. This is so that the file is compatible with the marker laser.

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Box Logo

This is the Paper Noise logo. However, I forgot to invert the colours, which meant that I had to make a new plywood panel and re-etch the surface.

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Laser Etched Panels

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Populated Panel

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Oscillator Circuit Diagrams

I used two oscillators on this keyboard. The first was a Hex Schmitt Inverter Oscillator and the second was a stepped tone generator (atari punk console). Below are the two circuit diagrams I used.

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Low PAss Filter Schematic

The low pass filter is a passive design, this means it doesn’t need any power to operate, the drawback to this design is that it reduces the output signal by a noticeable amount.

The resistor used was a 10K potentiometer, so the frequency could be adjusted.

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Wiring Up

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Completed Box

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Completed Casio

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Casio Video