MIDIbox

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====== clk2a2clk ======
Midiclock 2 Audio Converter, Audio 2 Midiclock Converter\\
4 Recording a Midiclock on a Audio-Track on your Multitrack-Recording-Device\\
in order to get the possibility to overdub a sequencer track on Recording Devices without Midi-Clock builtin\\

{{:phatline:Clk2aClk.jpg?1000|}}\\
{{youtube>qjcWe_V-kEI}}
{{youtube>YXOqIRc4XmM}}
{{:phatline:Clk2aClk-test-setup.jpg?1000|}}\\
===== Introduction =====
i use a zoom livetrack-l12, a multitrack-audio-recorder: compact design, severell submixes, parametric eqs, compressor, efx and a master-track-recording, a good price...\\
AND it doesnt have midi... it does not do midiclock.\\
so when i have to make a track new, or i want to overdub a track, a track that is Midiclock-Driven a sequencer track for example...\\
\\
So with this device, i lose one Audio-Track, because i use this one Audio-Track, as a Click-Track, it records Audio-Rectangle-Pulses, which are a converted Midiclock-Pulses\\
{{:phatline:Clk2aClk-signal-from-uC.jpg?1000|}}\\
when i then playback the Click-Track-Recording, it converts this Audio Pulses back to Midiclock-Messages. 
{{:phatline:Clk2aClk-signal-from-Recorder.jpg?1000|}}\\
Thats all, not much code, stripped down, running thight.

==== Features ====
- **convert Midi-Clock-Data to Audio-Pulses\\ 
- **convert Audio-Pulses to Midi-Clock-Data\\

====== Hardware Requirements ======
**External Requirement:**(for example)
  * Clock Source aka Sequencer: [[mididocs:midibox_seq_v4l]]\\
  * a Synth: JP8080\\
  * a Multitrack-Audio-Recorder: Zoom Livetrack L12\\
  * 3x Midi-Cables\\

====== Shematic ======
{{:phatline:clk2a2clk-shematic.png?900|}}\\

====== Building FABRICATED PCB ======
for DIY on Protoboard - see below "Building DIY"\\
The Design is optimized for Pick and Place most SMD Parts are on the Back-PCB\\
i ordered 5 PCBs from JLCPCP with almost all SMD Parts (except Thruholes and the PTC) presoldered\\
now waiting for Presoldered PCBs\\
{{:phatline:clk2a2clk-3D-top.png?500|}}\\
arg... Jacks to near by... FIXME\\
{{:phatline:clk2a2clk-3D-back.png?500|}}\\

===== BOM =====
^Value^Designator^Footprint^LCSC Part Number^Library-Type^Mouser^
|47uF|C1,C2,C3,C4|midibox:1206-C|C96123|basic|
|100nF|C5,C6,C7|midibox:1206-C|C24497|basic|
|220nF|C8|midibox:1206-C|C1857|basic|
|1N4148W|D1|midibox:SOD123-DIODE|C81598|basic|
|LED-Yellow|D2,D3|midibox:0603-LED|C72038|basic|
|BootLoad|J1|midibox:Header-1x2|
|Debug|J2|midibox:Header-1x2|
|Int.Sw|J3|midibox:Header-1x2|
|Header-1x3|J4|midibox:Header-1x3|
|Midi-DIN-5-Socket_RX|J5|midibox:Midi-DIN5-MAB5SH|||806-KCDX-5S-S2 |
|Midi-DIN-5-Socket_TX|J6,J7|midibox:Midi-DIN5-MAB5SH|||806-KCDX-5S-S2 |
|3.5Jack|J8,J9,J10|midibox:35JACK-CUI_SJ1-3535NG-PI|||490-SJ1-3535NG |
|CV1|JAUT1|midibox:Header-1x2|
|Mounting-Hole|M0,M1,M2,M3,M4|midibox:Mounting-Hole-M3|
|PTC|PTC1|midibox:1206-R|C126818|extended|576-1206L150THWR|
|4K7|Rb1,R1,R2,R3|midibox:1206-R|C17936|basic||
|1K|R4|midibox:1206-R|C4410|basic||
|220|R7,R8,R9,R10,R11,R12,R13,R14|midibox:1206-R|C17958|basic|
|10K|Ra1,Ra2,R5,R6|midibox:1206-R|C17902|basic||
|100K|Rf1,Rf15|midibox:1206-R|C17900|basic||
|DIPCOREF4_52P|U1|dipcore-V2C:dipCoreF4_v2c-52p-DIP-40-CMPNT_CORE_52P||@Antichambre|
|6N138|U2|midibox:DIP-8|||512-6N138M |
|MCP6002|U3|midibox:SOP-8_SOIC-8|C7377|basic|
|mouse-cut|cut1,cut2,cut3|midibox:mouse-cut|



====== Building DIY ======
{{:phatline:Clk2aClk-midibox.jpg?1000|}}\\
**Midibox:**\\ 
  * [[home:mbhp:module:core32]]\\
  * [[http://ucapps.de/mbhp_midi_io.html|1xMidi IO]]\\
  * Soldering Iron, Wires, PCB....\\
  * USB Power Supply
**Schmitt-Trigger:**\\ 
  * TS-274 OP-Amp\\
  * 14 Pin - DIP-Socket\\
  * Pin-Header 2x5Pins (to connect the PCB to Core J5A)(you will also need a cable 4 that)\\
  * Resistor R1  20K\\
  * Resistor R2  4K7\\
  * Resistor RFB 100K\\
  * Resistor for Output-Gain-Reduction 100K\\
  * 2x Electrolyt Capacitor 0,67uF (to decouple audio in and out)\\
  * Electrolyt Capacitor 10uF for Supply\\
  * Capacitor 100nF to denoise the OP-Amps-Rails...\\
  * 2 Audio Cables+Sockets for the connection to the Recorder (6,3 mono jacks)

===== on Protoboard =====
here i have made it all on protoboard:\\
{{youtube>9m22V8tvMXs}}\\
{{:phatline:clk2a2clk-proto-back.jpg?1000|}}\\
{{:phatline:clk2a2clk-proto-connect.jpg?1000|}}\\
{{:phatline:clk2a2clk-proto-shematic.jpg?1000|}}\\

====== Firmware =====
V1.2017{{:phatline:clk2a2clk.zip|}}
hardcodet no menue, no nothing, stripped down to max performance\\

====== How I Use It  -  built in Rack ======
{{:phatline:Clk2aClk-L12-switch-led.jpg?1000|}}\\
{{:phatline:Clk2aClk-L12-rack-solution.jpg?1000|}}\\
{{:phatline:Clk2aClk-L12-rack-back.jpg?1000|}}\\
{{:phatline:Clk2aClk-L12-rack-inside.jpg?1000|}}\\

===== Resources =====
[[http://pcbheaven.com/drcalculus/index.php?calc=st_nonsym_sp|Schmitt-Trigger-Calculator]]\\

====== Community users working on it ======
  * **[[Phatline]]** =  Programming, Documentation...\\

Just let a Private message on the forum to user already involved