scratchcontroller
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scratchcontroller [2016/07/04 01:03] – [Introduction : DJ Controllers Issue] psykhaze | scratchcontroller [2016/07/04 01:46] (current) – [Software] psykhaze | ||
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======MB-Scratch Controller====== | ======MB-Scratch Controller====== | ||
+ | //By Rasteri// | ||
+ | |||
+ | {{ :: | ||
===== Introduction : DJ Controllers Issue ===== | ===== Introduction : DJ Controllers Issue ===== | ||
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* A smooth, reliable, high quality crossfader with curve control. | * A smooth, reliable, high quality crossfader with curve control. | ||
- | **[[http:// | + | **[[http:// |
===== Design ===== | ===== Design ===== | ||
==== Crossfader ==== | ==== Crossfader ==== | ||
- | The crossfader is the simplest part of the project. | + | The crossfader is the simplest part of the project. |
- | | + | For example : **[[http:// |
- | | + | |
- | * [[http:// | + | |
- | | + | |
- | The analogue ins of the PIC mean the fader can be used with no additional circuitry. Hooray! | ||
==== Jog Wheel ==== | ==== Jog Wheel ==== | ||
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I put the two photodiodes into two voltage dividers and wired them into pins 4 and 5 of the PIC. The comparators of a PIC18F4620 (or 4685) can be used to avoid extra circuitry. | I put the two photodiodes into two voltage dividers and wired them into pins 4 and 5 of the PIC. The comparators of a PIC18F4620 (or 4685) can be used to avoid extra circuitry. | ||
+ | |||
+ | |||
==== Software ==== | ==== Software ==== | ||
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The MIOS code tracks the encoder wheel, and counts the number of forward and backward steps. Then every couple of milliseconds it sends the relative position as a CC event. The value of the CC is equal to 64 (0x40)plus/ | The MIOS code tracks the encoder wheel, and counts the number of forward and backward steps. Then every couple of milliseconds it sends the relative position as a CC event. The value of the CC is equal to 64 (0x40)plus/ | ||
- | There are quite a few DJ applications that support MIDI scratching in this format, the two I've tried are [[http:// | + | There are quite a few DJ applications that support MIDI scratching in this format, the two I've tried are [[http:// |
+ | |||
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This is how to build the device the way *I* did it. It's not pretty (see photos) but works acceptably. It could be improved upon immensely if you have any actual construction skills, metalwork experience, access to a CNC mill, etc. | This is how to build the device the way *I* did it. It's not pretty (see photos) but works acceptably. It could be improved upon immensely if you have any actual construction skills, metalwork experience, access to a CNC mill, etc. | ||
+ | ==== Schematic ==== | ||
+ | |||
+ | {{ :: | ||
==== Parts ==== | ==== Parts ==== | ||
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==== Assembly ==== | ==== Assembly ==== | ||
- | [[http://picasaweb.google.co.uk/ | + | {{ :: |
- | Notes/Hints : | + | **Notes/Hints :** |
* There should be washers between the nuts and the scratch wheel. | * There should be washers between the nuts and the scratch wheel. | ||
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===== Firmware ===== | ===== Firmware ===== | ||
- | Code can be found in [[http:// | + | Code can be found in <del>[[http:// |
- | + | ||
- | + | ||
- | ===== Schematics ===== | + | |
- | [[http:// | ||
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- | ===== Photos ===== | + | ===== Original |
http:// | http:// |
scratchcontroller.1467594192.txt.gz · Last modified: 2016/07/04 01:03 by psykhaze