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cv1

CV-1

CV-Recorder/Looper & CV-Generator
Control Voltage Recorder, Looper, and Generator - for a own Eurorack-Line… more in Future!

–this picture is the first prototype - pre-Eurorack :-D
very-early-version...k

Features

* A Envelope which can be Recored from an AIN-Source, it can be Editet on Startpoint,ATK-Playbackrate, Decay-Playbackrate
* LFO which Waveform is stepless morphable from Sine Square Tri Saw-Up to Saw-Down…(only Clocksynced!)
* MSQ MotionSequencer to loop a CV-Signal.
* A Mixer Page which Mixes/Mutes ENV+LFO+MSQ - and scales the output CV
* Copy, Paste, Clear: to Transfair the CV Sequence to other CV1 Instances
* ProgramChange Load and Store on microSD-Card, Load and Store are CC-Commands, so you can remote the device
* The Sequencer can be set to Tact Systems: 3/4 4/4 5/4 7/4 9/4 11/4 13/4


–First Prototyp with a fiew modifications

Hardware Requirements

Midibox:

  • no other PCBs needet - but expandable with other Eurorackmodules in Future
  • µSD-Card, formated with FAT32
  • Soldering Iron - with a Dip that can Handle SMD-Parts, Wires, solder Paste for the µC….
  • Eurorack Power Source +-12V AND +5V!

Set

Cabeling

Midi IN1 »> CV1 Remote Device or a Midi-Sequencer
Midi OUT »> to a Global CV1 Remote Device FIXME - which will need a lot of Midiinputs M16?

  • @JMidi1: connect your Sequencer to get Midiclock and Programchanges
  • @JAIN1: 2 CV Inputs - 12V tollerant
  • @JAUT3: 1 CV Output - (internal DAC with Protection Cirtuit > 12V Tollerant)
  • @J19:Get up to 8 CV-Outputs, with a AoutNG
  • @JLCD1: up to 4 Additional OLED-Displays for every one a Reset Line - so no additonal Circuit needet
  • @J89: DIN and DOUT Shiftregister Chain: thought for decidet Expander Modules (which will come in near future
  • @J2/Bootload: If the core is not starting up - because of bad-Firmware, then bridge this Jumper to come into the Bootload-Mode

Software

Firmware

yes it loopin… but not good enough to release anything…

Building

The Design is optimized for Pick and Place most SMD Parts are on the Top-PCB
i ordered 5 PCBs from JLCPCP with almost all SMD Parts (except 10pF µSD and 4x100nF) presoldered
now waiting for Presoldered PCBs LOL - for 15€ a Piece!


The Resistors for the LEDs are under the top LCD, so test your LED brightnes before soldering the Top-LCD
You can remove LCD later but, it is hard! and you may damage the LCD or the PCB…

Frontpanel

FIXME - Eurorack Alu-Plate

Case

BOM

FIXME the 22R Resistors should be 220, the Green LEDs are still to bright even with 440 Ohm Resistors…

ValueDesignatorFootprintLCSC Part NumberLibrary-TypeMouser
100nFC1101206C24497basic
10uFC1116,C23251206C13585basic
10pFC17,C18,C19,C20,C21,C221206not avaiable
1N4148WD1,D2,D3,D4,D5,D64SOD123C81598basic
ENCENC1-ENC5ENC-PEC11R652-PEC11R-4015F-S24
5×2-AOUTJ19Header-2×5
BootLoadJ2Header-1×2
DinDoutJ89Header-2×5
HEADER_3JAIN1Header-1×3
Header-1×4JAIN2Header-1×4-female
Header-1×4JAIN3Header-1×4
CV1JAUT1,JAUT2Header-1×2
CV-OUT1JAUT3Header-1×2
BiOffJG1Header-1×2
GainJG2,JG3Header-1×2
DisconnectJG4Header-1×2
OffsetJG5Header-1×2
FootJG6Header-1×2
GatesJGate1Header-2×3
OLED3-6JLCD1Header-2×7
MidiJMidi1Header-2×3
Header-2×8-eurorackJpsu1Header-2×8
DIPCOREF4_52PM1dipCoreF4_v2c-52p-DIP-40MPNT_CORE_52PAntichambre
uSD_DM3ATDM3ATM2uSD-DM3AT-SF-PEJM5798-DM3AT-SF-PEJM5
6N138M3DIP-8512-6N138M
LED-GreenMenue-1,TR1,Clock-1,ENV-1,Menue-2,TR2,ENV-2,Menue-3,Menue-4,Menue-5,Menue-61206-LEDC559120extended
OLEDOLED1,OLED2SSD1306:OLED-SSD1306-128×64
PTCPTC11206C126818extended
10KR28,R29,R43-R581206C17902basic
49K9R30-R40,R61-R641206C18017extended
30KR41,R421206C17999extended
130KR591206C17893extended
100KR601206C17900basic
1KR1-R71206C4410basic
4K7R81206C17936basic
220R9-R27,R631206C17958basic
Trim-3224W-1-104ERV1,RV2Trimmer-3224W-1C53229extended
Trim-3214W-1-253ERV3Trimmer-3214W_Vertical652-3214W-1-253E
74HC595S1-S3SOP-16_SOIC-16C5947basic
74HC165S4,S5SOP-16_SOIC-16 C5613basic
TL072U2,U3SOP-8_SOIC-8C6961basic
MCP6002U6SOP-8_SOIC-8C7377basic

Shematic


To Do

a housing/case or frontplate

Resources

Community users working on it

  • Phatline = Prototype, Shematic, PCB, Programming, Documentation, all…

Just let a Private message on the forum to user already involved.
I have ProtoBoards here - i test one, and if it works, i can share them for Beta Testing-if you pay the postage

cv1.txt · Last modified: 2021/03/10 13:34 by phatline