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smycza

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Posts posted by smycza

  1. Adding a External Filter for MIDIBOX SID - how... ?

    in Design Concepts

    Posted

    ok now I understand the concept but [there is always a but ;) ] I have a few more questions, hope not to bore you to death ;)

    ---------------------------------------------------------------------

    FOR captain Hasting's digital potentiometer circuit

    ---------------------------------------------------------------------

    It's a great idea ! Simple, easy to build but how about controlling this stuff ?

    On what MIDI event does it reacts ?

    I must confess I have no programming skills (microprocs) and for making patches I'm just using JsynthLib.

    So is there a possibility to control the externa filter (eg. Moog filter) in the way I'm controlling the internal SID filter ?

    how could it be realised ?

    --------------------------------------------------------------------

    FOR CV outs with AOU module

    --------------------------------------------------------------------

    It's a bit more compex than  captain Hasting's digital potentiometer circuit but also more efficient.

    The same question: how could I controll the params of CV outs ? since on TK web site there is only

    a pure schematics wit board layout, and no description how it works or any other documentation, could anybody explain to me

    how to control this ?

    thanks fo all the answers, hope this could also help the other members and hobbists

    best regards, smycza

  2. Adding a External Filter for MIDIBOX SID - how... ?

    in Design Concepts

    Posted

    Hi Everyone

    I find the original SID filter to sounds wack, and I'm interested in building a Moog filter to reach more interesting sounds.

    I know I can control it using pots/knobs but I would like to control it remotely by midibox sid (like we can control the internal sid filter)

    and now, only I have in my mind are questions :)

    What is the simplest way to add a external filter to a midibox sid so I could control it the same way I control the internal SID filter ? (I mean - automatation - so I could make patches)

    I know that the params of internal SID filters are controlled using midi CC commands, so how could I control the external filter params ?

    (not only by it's [filter's] knobs but also by midi commands/events)

    I was reading something about DOUT and AOUT and CV outs but I don't fully understand the topic since I'm new to "MIDI world".

    Could someone put it out clearly, cause I think I'm not the only one who would be interested in having a external filter working with midibox sid.

    best regards, smycza ;)

  5. MBHP_BURNER beta

    in Latest News

    Posted

    note that some BC337  transistor have different E B C countings (depends on the manufacturer). I had the same problem - rotated the transistor 180 degree an voila - works fine.

    try looking on www.alldatasheet.com for BC337 and you will see that in some manuals you got EBC counting, and in others CBE.

  6. PIC PROGRAMMING PROBLEM! PLEASE HELP !

    in Testing/Troubleshooting

    Posted

    Hi Everyone !

    When I bought my first PIC - my friend programmed it on a prof. programmer.

    When I put it into the socket (CORE) I was getting the 'sign of life' from PIC. But when I tried to send MIOS via MIDI something messed up and

    it started to send some pitch and reset data (weird..). So I built MBPH_BURNER and  I tried to program it again (since my friend couldn't program it again for me :( )

    Now - when I try do burn bootstraploader into my PIC18F452 it verifies it as ok.

    But when I read my chip - the config bytes are different from those from bootstraploader.hex

    (they are always  2600 0F0F 0100 0081 C00F E00F 400F). I tried it on 4 different PIC's - alway the same result.

    When I put PIC into the CORE's socket there is no "sign of life" and my MIDI IN port do not read anything (my MIDI is working fine - I've made loopback tests).

    So what could be the problem? Is it the false CONFIG or did something blown-up when I tried to upload MIOS via MIDI ?

    I checked PCB - it seems to be ok.

    Please help me if You can, cause I cannot sleep anymore because of this ;)

    best regards, smycza

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