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Screaming_Rabbit

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Posts posted by Screaming_Rabbit

  1. Identify PSU???

    in Parts Questions

    Posted

    i don't have a MidiBox with motorfaders.

    But in this 'MidiBox of the week' posting you can read that 3A are enough for moving 16 MFs simultaneously:

    http://www.midibox.org/cgi-bin/yabb/YaBB.cgi?board=gallery;action=displa y;num=1083500709;start=0#0

    Or just email some of the guys who have already built a MB with 24 faders... (Look at all those MB LCs in the gallery or in the "MB of the week" section)

    ... well I thought it will work ;) ... but I would like to know why. - Why does the datasheet say: 800mA?

    http://www3.alps.co.jp/pdf/2004pdf/pdf_e/Potentiometer/Mixers/mortor.pdf

    Greets, Roger

    @Raphael: Sorry, I never answered you the question about Switzerland: Yes I'm from the German speaking part.

  2. Identify PSU???

    in Parts Questions

    Posted

    Thanks guys!

    I read in the datasheet for the ALPS faders, that max. used Motor current is 800mA.

    I'm planning a 24 Fader Box and it's possible, that as a snapshot all faders have to move together... where do I get a 19,2A 12V Powersupply (no switching type) from?

    I see on Thorsten's LC-PSU-pdf, that he uses a 1,5A fuse for one MF-Board (8 faders = 6.4A)... can somebody explain me that? Is that because there are only pulses driving the motor?

    ... and another question:

    Is it possible to connect PSUs in parallel like batteries to raise the possible current? If yes, any type?

    Greets, Roger

  3. Identify PSU???

    in Parts Questions

    Posted

    The fuses are really a little bit confusing. I think they are primary. Otherwise they would make no sense on the secondary output. You don't need such a big transformer for only 1 A output .

    ... is it possible, that they are chosen that low to protect the powered equipment they have to supply?

    Greets, Roger

  4. does anyone make this pot?

    in Parts Questions

    Posted

    Hey t

    i guess the 'standard' method is using a 360 degree.

    ... usually a pot has about 300° (far left to far right). There shure are some pots which have like 10 turns (precision pots). Sometimes used for motorized pots mounted at the primary gear side (attached to the motor). - I think p&g motorized joysticks work like this. So when you turn the shaft 300°, the pot actually makes 10 turns.

    or an endless rotary pot (rotarys are endless right?)

    No. They always have an end (lowest to highest resistance). Rotary just means, that you turn it around it's own shaft. What you mean, is an endless rotary encoder. Every detend is one pulse sending to the digital input. A pulse, telling the host software to adjust the pan (for example) one step to the right or the other way. When the position in the host software is at it's end (example: left) , you can go on turning the encoder counter clockwise (sending pulses) but the position (in the host sw) stays far left till you turn the knob to the other side.

    reason for the 180 degree is just purely for panning purposes. so slam it clockwise and its panned hard right. dig?

    ...when you slam a 300° clockwise it's hard right as well... ;)

    if thats true, does anyone make a touch sensetive pot?

    Yes... but no detend in the middle position. A touch function you only need for motorized pot's... to tell the motor to stop driving when you want to take over the adjustments (touch write function in your host sw)

    http://www3.alps.co.jp/pdf/2004pdf/pdf_e/Potentiometer/Metal/rotary_motor.pdf

    I would suggest, that you take an encoder. You even can take one with a switch (push the turning knob to close the switch). You can program the switch to send a midi event to tell the host sw to jump to the middle position (instead of a pot with a detend in the middle position)

    Greets, Roger

  6. Identify PSU???

    in Parts Questions

    Posted

    Have you considered using a rail/captive nut combo like the blow molded effects racks (skb/gator)?

    No I didn't... too late  :( I'm done. -  Now I propably own the most expensive rack rails in  the world  :-* (calculated approx. 6 hours)

    Here the printing on the power regulators:

    - the 5V units use Sanken SI-3554M

    - the 12V units Sanken SI-3120M

    http://www.sanken-ele.co.jp/en/index.html

    I can't find any datasheets. Not on the Sanken site (they just write: discontinued) nor by google.

    Can anybody help? Does anybody have one of those electronic bibles in which you can find all the data of transistors?

    Greets, Roger

    BTW: The fuses you can see on the frontpanel are on the secondary side. The main also has fuses built into the socket: T315mA/250V

  9. Doepfer Fader nachbauen

    in Deutsch

    Posted

    Leider tu ich mich noch ein bischen schwer was die Zusammenstellung der einzelnen Module angeht  

    Deswegen wäre ich für ein bischen Hilfe eurerseits echt dankbar!!

    1x Core

    http://www.ucapps.de/mbhp_core.html

    1x DINX4 (falls Encoder an Stelle von Potis verwendet)

    http://www.ucapps.de/mbhp_din.html

    ... für normale Fader:

    1x AINX4

    http://www.ucapps.de/mbhp_ain.html

    ... für 16 Motorfader:

    1x zusätzliches Core

    2x  MF Module

    http://www.ucapps.de/mbhp_mf.html

    anstelle der Encoder (an DINX4 board) können auch Drehpotis verwendet werden (am selben AINX4 wie die Fader - nicht Motorfader)

    Die Fader und Potis müssen 10kOhm linear sein.

    www.albs.de

    Grüsse, Roger

  11. OOPS? IC Socket question

    in Parts Questions

    Posted

    [sarcasm detector on - sarcasm as a shield on]

    Err.. Well.. What do you think? Why is that lip there anyway?

    Because you can plug chips there either way, the lip is there to remind you which was the correct direction. So, you can desolder and turn socket around If you're absolutely sure that you can't remember which way the chip was supposed to face..

    pheww.. Moebius

    [/override previous modes]

    ;D hehehe... good old moebius  ;D

    ... I'm just waiting till he's pulling on my leg  ;D

  14. LEDrings?

    in Parts Questions

    Posted

    I suppose it would be cheaper, but not necessarily easier and certainly not neater

    ... seems like it is easier  ;) You have to remember, that there is also an encoder sitting in the middle of the ring  :-/

    http://www.midibox.org/cgi-bin/yabb/YaBB.cgi?board=concepts;action=display;num=1104455259

    By the way, what kind of LEDs should I use? I saw these really tiny ones, I think they're referred to as "low profile LEDs", but the leads stick out to the side instead of down like most LEDs. I assume they can be bent.

    ... yes they can be bent. I bought some of these from "voti"

    http://www.voti.nl/shop/p/LED-4.html

    Greets, Roger

  15. Identify PSU???

    in Parts Questions

    Posted

    Thanks a lot guys!

    I will deliver the information, as soon as I find time. I'm quite busy right now. I'm building my studio furniture and made a mistake in design. - Now I don't get the appropriate rack rails and have to build those as well. This means drilling about 400 holes and cut the windings for the screws into those "blank" rails by hand  ::) ;D :D :-/ :( >:( :P

    Greets, Roger

  19. Large Format console automation?

    in Design Concepts

    Posted

    im pretty used to having the keyboard for midi in/out

    ... with the keyboard is not MIDI In/Out those are keyboard commands based on the windows rules. The advantage of controlling some functions by MIDI, is that no matter which window is active on your computer monitor, your host software will execute the command.

    Well honestly im not too thrilled about the idea of drilling holes in my console for buttons

    ... why not  ;D ::) :-X

    What you could do: Design a new hand-rest and extend the functional mixer surface towards you by about 1.5 Inches. This way you could put the original hand-rest pieces in the cellar and mount them again for reselling the mixer at a later time.

    Advantage with some buttons: Automated "Mute" and channel selection.

    there has to be a fader with two log paths and one linear path, how do the big boys do it then? and thanks alot for the info. everything is coming together kinda.

    ... I think I saw something like this from P&G. They call the linear track "servo track"... not shure about that... just surf their specs files.

    http://www.pennyandgiles.com/index/map.asp

    Greets, Roger

  20. Large Format console automation?

    in Design Concepts

    Posted

    Ok so i think im a little overwhemed with information, i need a fader with a motor and an audio track for the mixer and another track, but what is that track called? is it just another audio track?

    ... it's just another resistive plastic slide track on the fader. for every track you can chose it's resistive behavior (linear & log). You can say: I want 2 tracks with log behavior or one linear and one log or two log...

    also what about stereo faders? they need two audio tracks and another track?

    ... yes. But I think this is not available. You have to build a left and right channel fader.

    apparently ALPS are the most superior

    ... with P&G and TKD

    im gonna put them physically in the mixer, and beyond that im hoping to daisy-chain the core modules to get at least 40 faders out of them.  

    will this work? will it not work?

    ... if you want to implement it under the LC protocol (locic Control / Mackie Control): 8 Faders per MIDI In/Out... I think daisychaining all of them would give you a to high latency anyway.

    how the hell am i gonna program all that? am i crazy for trying it?

    If you work with the MididBox LC, you don't have to program much

    And tell me if im wrong, this is what i need initially....

    A fully involved core module,

    a fully involved MF module with 8 moving faders

    .. don't you wanna extend it with some buttons... at least a play, stop etc. button?

    Greets, Roger

  21. Large Format console automation?

    in Design Concepts

    Posted

    Perhaps you can live without a touch track and just use a regular switch positioned by the fader for a mios emulated touchtrack? works pretty damn well and will prolly knock a few nuggets of the cost

    ... as far as I know, they even don't come without touch... and I'm so used, working with touch, that I think I couldn't live without anymore.

    Have u got a price sorted on those alps? I think theyre gonna be pretty dear

    ... Yepp! - About 45 Euros

    Also, say your using these in the LC/MC app would it be possible to switch between controlling either s/w (logic for instance) and ext analog vol at any givin time?

    ... you don't need a switch. You would take a RSA0K12xxx (C stands for: coreless motor). This type has the standard Touch track, and the choice of, for example, one linear track and one log track. So you wire the linear track just like in a regular Midibox LC and the log track in the line of the analog mixer channel strip (nicest would be to replace your mixer faders physically). With that you have the choice to work natively within your host DAW software and use the faders to control the DAW mixer or you use the analog mixer and use your host just as a mixer and multitrack player for mixdown. When you use the analog mixer you will have the problem that your software mixer faders will move as well, so you would have twice the attenuation. So just use the bus outs (prefade / direct out) and patch them internally to your DA converters.

    Greets, Roger

  23. Large Format console automation?

    in Design Concepts

    Posted

    Didn't they offer an automation drop-in for Mackie 8Bus - just a box, with a midi and TSR plugs -  32 VCAs?!?

    ... yes they did, but no moving faders  :-/

    I think I just saw that someone had trouble with those

    I'll go with the Alps K-Type fader (almost same quality & price as P&G). But electronically they have exactly the same data as the "cheap" N-Type fader. I hope they work from the beginning  :P

    Greets, Roger

  24. Some help on touch sensors PLZ!

    in Design Concepts

    Posted

    Since the touch function works by grounding when you touch it which gives a difference in potential, I would say, you have to connect them to ground. I don't know about you should connect it over a resistor.

    Please search the archives... I think I once have seen a post, concerning this.

    Greets, Roger

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