PControl Modular Part#3

Its been a long time since the last post but I’ve been working on it again in the last 3 months.

Everything is tested but the MIDI part and everything works fine so far.

Here is the current 20-loop prototype (backside):

From top to down and left to right:

• OLED Display 128x64px
• Power distribution PCB (9V in, 6x5V out, 1×3.3V out)
• PCM Control board
• 3x PCM extension board

 

 

Things to do:

• Verify MIDI functions
• Change processor to a version with more programming memory (The fonts for the graphic display are a little large compared to the rest of the code)
• Remove some bugs from the code that have to do with storing information
• Do documentation ! 🙂
•  …

While working on the code the final specs come to light:

• Full modular design
  • auto detection of display type
  • auto detection of extension modules connected
  • piggiback mounting of control boards (switches and indicators)
• Minimum solution has 5 loops, expandable in steps of 5 up to 20 loops
• There are three display variants at the moment
  • 3 digit 7-segment LED
  • 132×32 LCD Module with backlight (DOGM-132)
  • OLED 128×64
• 120 presets that can be organized as
  • 24×5
  • 12×10
  • 8×15
  • 6×20
• Each preset stores
  • 20 loops
  • 12 letter preset name
  • 16 bytes of midi data to be sent
• Switching options
  • Tuner out
  • Mute while switching (configurable mute time)
  • standard loop-switch
  • opto loop-switch
  • amp selector
  • amp channel switching (TS/TRS)
  • loop order switcher
  • stereo option
  • switching of “before amp” effects and “amp send/return effects” in one setup
  • MIDI switching of external effects and amps
    • Program Change (selectable channel and program)
    • Control Change (selectable channel, control and value)

 

Adding a few more pictures:

Please be aware that the images show prototyping at its best, so I added a few more connectors and things than needed on the final version 🙂

Control board:

 

Extension Board:

 

 

7-segment and control board:

 

Pigyback mount of Control board and Display board:

 

 

external LCD module 132×32:

 

 

External 7-segment Module:

 

 

Extension-Control board:

 

 

 

The design is working well but I need more programming memory to do some really nice editing features on the graphic displays.

Because of this and a few other things I decided to do new layouts for the Controller, Extension and Display-Boards.

Upcomming post#4 will show what I came up with on Eastern.