Bluetooth MIDI Interrupter (TQFP)

The NEYi, Fri Aug 28 2015, 01:58AM

Greetings, folks!
We're HV enthusiasts from Ukraine and have already made lots of stuff 4HV community might find at least interesting.

In this thread I'm going to tell about SimpleInterrupter.
It's a board which can be embedded in your HV designs to get a lot of cool features: starting from wireless control, advanced MIDI synthesis and finishing with QCW coils driving and ability to build complex orchestras, controlled directly with software like FL Studio or Steinberg Nuendo.



Ok, pretty napoleonic already, but let's take a look at SI's practical side. How do you use it?
Since it has Bluetooth module, the main ways of control are wireless, with Android device or PC.
Control software for Android called SimpleTesla and can be downloaded directly from Google Play(aka Android Market):
https://play.google.com/store/apps/details?id=org.tqfp.simpletesla2&hl=uk



The other way is physical, via optical link. This way allows to control your TC directly from any MIDI-compatible device: keyboards, drums, etc.


Now a bit about software features. SI does:
1. Standard burst-mode interruption;
In this mode application emulates calssic bursted-mode interrupter, usually build with 555 timers.

2. MIDI playback features.
This mode allows to play MIDI files directly from SD card.
The player has tons of fancy features, such as synthesis effects(ADRS, Portamento, LFO), time and volume control, track selection, etc.

3. Safety and limitation settings.
In this mode you can set limits of output frequency, output pulse width, select TC type, input mode, etc.

4. Dynamic pulse width.
With it you can play notes as high as 2000 Hz without any damage to your DRSSTC.
The pulse width depends on playing note and limiting settings. The graph below shows the dependance:



And in conclusion, here's a little video which shows SI-based design playing Nyan Cat with violin-like sysnthesis effects.



Any comments will be appreciated.