DrehBank

introduction

the "DOEPFER DREHBANK Midi Controller Box" is a device with 64 knobs (at least the version i found) which are assigned to different midi commands. the price is about 299 euros which is imho not reasonable.

we try to build a minimalistic midi controller box from scratch. therefor we assume that:

1. 64 knobs are a great deal too much
2. midi commands may be mapped to other channels/commands in software

that's why we start our first minimal device as follows:

1. use 8-16 knobs => atiny2313 (8) or atmega16 (16) will do the job
2. assign static commands/channels to knobs

in later versions we could think about features like:

1. reassignment of knobs/commands at run time
2. snapshot (see doepfer drehbank features) function (not a problem at all)

hardware: basic ideas / electric circuit diagram

this is a very first schematic of our midi controller device:

list of used parts:

• 01 x KUPFER 0,2MM (reichelt) 1,55
• 01 x TEKO 104 (reichelt) 10,15
• 01 x H25SR??? (reichelt) ??
• 16 x P4M-LIN 470 (reichelt) 0.53

software: basic ideas concerning the firmware