Lamouette

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About Lamouette

  • Rank
    MIDIbox Tweaker
  • Birthday 11/19/1986

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  • MSN francois.zagar@hotmail.fr

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  • Gender Male
  • Location Quebec (Canada)

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  1. TPD Euro - EuroTPD

    Love the squared led matrix !
  2. SEQV4 : Adding leds to gate out

    Ok, all is working like it should be i haven't connected everything yet. One questions. I use a TPD and the CV/GATE/CLOCK/TRIGGER side by side. TPD is connected and powered by the SEQ PSU, which is a PSU with no connection to ground. (i will have to connect the CORE_STM32F4 ground to it) I use my eurorack power supply to power the AOUT_NG, Only the +12V/GND/-12V If i understand correctly, on the AOUT, the GND will be different from 5V and +12/-12V.   Can it be a source of problems like ground loops ? Is there a problem about removing the +5V and GND from the J1 connector on the AOUT_NG and power it with the eurorack PSU ?   By writing this expect another problem, GATE/CLOCK/TRIGGER, come from a DOUT, which have is proper ground so anywat i will get a ground loop ?   Thanks for your asnwer ! EDIT : (another thinking) I have a SEQV4 PSU which provide +12/-12V so i can power everything from it, but, same problem, i will have ground loops between my eurorack PSU,adn the SEQ PSU, when i will connect a jack between CV/GATE/CLOCK/TRIGGER jack's and an input of my modular ?  
  3. SEQV4 : Adding leds to gate out

    Thanks for your answer ! I resolved my problems, and it is now working, but i don't understand what i did, led was always lit, i shuted down, and re power on my SEQ, and it was working perfectly ? Really strange behavior.   But it was really interresting to test it. i realise how i loved to build kits, but how it is bad to build something you don't understand. I read a lot yesterday about simple components, and decided to buy a book to learn deeply what i am doing, i suppose this is the next DIY step. but after 4 years, i really need to understand. i also realise how, i hated the electricity at the school, and haven't remembered anything !   So i restart from nothing, and i feel happy to learn htings ! Sorry for the philosophical post. To explain, i have a DOUT on a seperate PCB, i will build the gates led on a separate breadboard, and attach it on the back of my eurorack panel, with the AOUT _NG, and the TPD.  
  4. Hi, I continue here to get about my problems. So, i made a separate eurorack panel with a TPD, and the CV outputs ( CV/Gate, / clocks / triggers) I want to add leds for the gate outputs. I checked some schematics about how it is done. (Especialy Hexinverter midi2cv, Yusynth, and Altitude euro Aout here on midibox) i understand how it works, but i am not able to get it working. Some data : Gate Voltage mesured : 4.8V Leds : 20mA 1.85V ( so 470R resistor) Transistor : 2N3904   If i understand this is a NPN, so closed by default, and it will opens only when a bit of current is flowing, (current provided by the gate)   But the led is always lit.   Should i ad a resistor between to leg to create a kind of fake load ?    
  5. Aout Euro - Prototype 1

    Don't want to hijack the thread, but i tried the schema, with the good value for my leds, but impossible to get it working. i have 4.8V at the gate output, and used 470R resistor for my led. The datasheet for the BC547 say : Emitter-Base Voltage 6V, is my gate voltage to low to open it ?
  6. Aout Euro - Prototype 1

    I already did the front panel, and don't want to add a specific DOUT only for this.   I will use Altitude value and check what happens !
  7. Aout Euro - Prototype 1

    Hello, altitude, i am on the way to add leds to my gate outputs. Are you using BC547 as transistor ? i try to understand how it works, i checked shematics of the midi2CV of hexinverter, some yusynths pcbs, and yours , you all use a transistor, but no one use the same way to accomplish this (maybe it is the basics, sorry if it is THE noob question).  
  8. OLRE16, in colors.

    Oh yeah, looks so good !
  9. Aout Euro - Prototype 1

    Don't you need to add a diode (like a 1N4148) after the resistor after the 595 to protect it in case of putting a voltage on the cv/gate/trigger/clock accidentally ?
  10. DrawingTPD.JPG

    From the album Lamouette - Midibox

    Preliminary drawing for TPD Frontpanel
  11. My SEQV4 - Finished electronics !!!

    Thanks a lot Hawkeye, you have been a really great helper !   Now i have to work the case, but that should be easier for me.   I will keep my thread updated, it could be a great help for someone like me who strart from nothing !   And finnaly it is funny as the first pcb i ever solderd (a DOUT), is the last i added to my build ! it was fun to check my first solder :)
  12. My SEQV4 - Finished electronics !!!

    Hell yeah, after huge reading, IT WORKS !!!!!!!!!!!!!! So after a long story, i just finished the electronics, a picture is needed to immortalise the moment, really, a great moment !  
  13. This is really helpfull, thanks for doing this !
  14. My SEQV4 - Finished electronics !!!

    I trided to modifiy the shift register number, but it is not working : As the TPD in normal connection, is connected to 5 6 7 8 9 10, i suppose the shift register 1 2 3 4 already used by the wilba panel. (1&2 by wilba BLM, and 3&4 by BPM digit) I tried to put the TPD at the end of the chain, to avoid problems, so : Original config : # See also http://www.midibox.org/dokuwiki/doku.php?id=tpd_pcb ################################################## # set to 1 or 2 to enable the relative track position display # 0: TPD disabled # 1: TPD enabled - columns are cathodes, rows are anodes # 2: TPD enabled - columns are anodes, rows are cathodes TPD_ENABLED 2 # define the DOUT shift register to which the columns are connected (0=disabled) TPD_COLUMNS_SR_L 10 # for a 16x16 TPD: define the SR to which the right columns are connected (0=disabled, use only 8x8 TPD) TPD_COLUMNS_SR_R 7 # define the DOUT shift register to which the green LED rows are connected (0=disabled) TPD_ROWS_SR_GREEN_L 8 # define the DOUT shift register to which the right green LED rows are connected (0=disabled, use only 8x8 TPD) TPD_ROWS_SR_GREEN_R 5 # define the DOUT shift register to which the red LED rows are connected (0=disabled) TPD_ROWS_SR_RED_L 9 # define the DOUT shift register to which the right red LED rows are connected (0=disabled, use only 8x8 TPD) TPD_ROWS_SR_RED_R 6 ################################################## # CV and Gate/Trigger/Sync Setup ################################################## # AOUT interface now selected in CV Configuration Menu and stored in MBSEQ_GC.V4 file # please scroll through the menu to find this page! # the 8 CV gates can be assigned to a shift register (0=off, 1-32: number of shift register): # - 1st CV Gate available at DOUT SR output D7 # - 2nd CV Gate available at DOUT SR output D6 # - 3rd CV Gate available at DOUT SR output D5 # - ... # - 8th CV Gate available at DOUT SR output D0 CV_GATE_SR1 0 # and DIN Clock Outputs can be assigned to a shift register as well (0=off, 1-32: number of shift register): # D7..D0 will output individual clock or start/stop signals which can be configured in the CV configuration page CLK_SR 0 # additional gate triggers are available on common digital output pins of the # DOUT shift register chain - they are assigned to AOUT channel #16 (Note C-1, C#1, D-1, ...) # define the shift registers which should be used here (each provides 8 gates) # Note that SRs assigned to this function cannot be used as LED outputs (exclusive function) # Allowed values: 1-32, 0 disables the function, all other values invalid and not allowed DOUT_GATE_SR1 0 DOUT_GATE_SR2 0 DOUT_GATE_SR3 0 DOUT_GATE_SR4 0 DOUT_GATE_SR5 0 DOUT_GATE_SR6 0 DOUT_GATE_SR7 0 DOUT_GATE_SR8 0 # if set to 1, the additional DOUT "gates" will send 1mS pulses # useful for analog drums DOUT_1MS_TRIGGER 0 Modified config : # set to 1 or 2 to enable the relative track position display # 0: TPD disabled # 1: TPD enabled - columns are cathodes, rows are anodes # 2: TPD enabled - columns are anodes, rows are cathodes TPD_ENABLED 2 # define the DOUT shift register to which the columns are connected (0=disabled) TPD_COLUMNS_SR_L 14 # for a 16x16 TPD: define the SR to which the right columns are connected (0=disabled, use only 8x8 TPD) TPD_COLUMNS_SR_R 11 # define the DOUT shift register to which the green LED rows are connected (0=disabled) TPD_ROWS_SR_GREEN_L 12 # define the DOUT shift register to which the right green LED rows are connected (0=disabled, use only 8x8 TPD) TPD_ROWS_SR_GREEN_R 9 # define the DOUT shift register to which the red LED rows are connected (0=disabled) TPD_ROWS_SR_RED_L 13 # define the DOUT shift register to which the right red LED rows are connected (0=disabled, use only 8x8 TPD) TPD_ROWS_SR_RED_R 10 ################################################## # CV and Gate/Trigger/Sync Setup ################################################## # AOUT interface now selected in CV Configuration Menu and stored in MBSEQ_GC.V4 file # please scroll through the menu to find this page! # the 8 CV gates can be assigned to a shift register (0=off, 1-32: number of shift register): # - 1st CV Gate available at DOUT SR output D7 # - 2nd CV Gate available at DOUT SR output D6 # - 3rd CV Gate available at DOUT SR output D5 # - ... # - 8th CV Gate available at DOUT SR output D0 CV_GATE_SR1 5 # and DIN Clock Outputs can be assigned to a shift register as well (0=off, 1-32: number of shift register): # D7..D0 will output individual clock or start/stop signals which can be configured in the CV configuration page CLK_SR 6 # additional gate triggers are available on common digital output pins of the # DOUT shift register chain - they are assigned to AOUT channel #16 (Note C-1, C#1, D-1, ...) # define the shift registers which should be used here (each provides 8 gates) # Note that SRs assigned to this function cannot be used as LED outputs (exclusive function) # Allowed values: 1-32, 0 disables the function, all other values invalid and not allowed DOUT_GATE_SR1 7 DOUT_GATE_SR2 8 DOUT_GATE_SR3 0 DOUT_GATE_SR4 0 DOUT_GATE_SR5 0 DOUT_GATE_SR6 0 DOUT_GATE_SR7 0 DOUT_GATE_SR8 0 # if set to 1, the additional DOUT "gates" will send 1mS pulses # useful for analog drums DOUT_1MS_TRIGGER 0 But i got nothing on the TPD... Any thoughts ? The TPD have 9 Shift register but i can only see 6 assigned on the MBSEQ_HW.V4