doc

I also think, the maximum is 8 Faders per CORE...

First of all, there are no stupid questions - only answers ! Answering Your Question: Your almost right. But you have to build - 2 and 1/4 DINX4 (let's say 2, because the 1/4 DIN is better wired sepaeratly on a vector board) - 2 DOUT The rest is ok. The LTC is "nice to have" but not neccessary (only if you need serial communication, it is a must) Hope this helps DOC

There's a great difference between pot and encoder. These are completely different parts A pot changes the resistor (analog) while changing the value and a rotary encoder "sends" on/off messages (digital). Doc

There is an easy way to test the knobs: Just take your Multimeter and measure the resitance on e.g. both ends of the knob. You must measure 0 Ohm. If the test is ok you have to check if the knobs fit well on the faders. Also you can measure from the touchfader pin on the fader to the knob (with knob fitted on the fader, of course). You also should get (nearly) 0 Ohm for this Test. Hope this helps DOC

Hi, 1N4007 Diodes can drive a higher current than 1n4001. You can use them also. Theres no problem. Just pay attention on the polarity. greets Doc

Him I've looked up the english name for the styrolflex caps: At Farnell they are called "Polystyrene" and the MKT caps you can also define by the dielectricum "Polyester". Hope this helps DOC

Only the two filter caps need the styroflex caps. The other caps in the audio tree (1nF , 470pF) should be polyester. (FKP). In fact these 3 caps aren't so complicable. I'm pretty sure you'll hear the difference only in high end applikations. But if you use good caps in the whole audio part you automatically reduce noise problems also. I'm also pretty sure that the styroflex caps have a different name in the US. I'll try to find out for you. Doc

Hallo, die eeproms gibts nach wie vor am Günstigsten als Samples von Microchip .... (umsonst) Gruss Doc

You're right, ceramic caps should't never be in a audio circuit. I wrote this some weeks ago in another post. I think I'm not able to explain the differences well in english. Just so much: It has to do with worse frequency stability and temperature drift of the ceramic caps. If you need a frequency stable circuit (like audio) don't use ceramic ... Better in Audio circuits are polyester caps or styroflex caps. In Germany the polyester caps are MKT or MKS or FKP type. Doc

A really good question. I would like to know also. Doc

Hi, I didn't check your layout. You can use the 512 without any modifikation, I think. regards Doc P.S.: Your english is much better than my french ... ;D

...mal ein Schuss ins Blaue ... hast du in der midibox_sid_v1_5c_18f_stepC jedem Core eine eigene ID gegeben ? Auszug aus der Main.asm: ;; ========================================================================== ;; General Settings ;; ========================================================================== ;; here you can change the default device ID - if you are using ;; some cores as slave, set: ;; o DEFAULT_DEVICE_ID 0x01 ; for the first slave ;; o DEFAULT_DEVICE_ID 0x02 ; for the second slave ;; o DEFAULT_DEVICE_ID 0x03 ; for the third slave #define DEFAULT_DEVICE_ID 0x00 ... Weiss nicht obs daran liegt, aber es ist ein Versuch :P Gruss DOC

Hey T, I'm a little bit angry >:( because of of this fantastic design ! Please give me a little more time to finish my Box LC so that I can start direct with the sequencer. YOU ARE TO FAST !!!! I also wonder, where you get the time to build such wonderful machines. Sure is: This Sequencer is my next project ! I think we'll all have a serious problem.... while spending so much time on your projects we couldn't find any time to make music with all our "new" equipment ;D Do you feel the same ? Another thing: Some weeks ago I ordered my motorfaders at albs. I had a long telephone call (about an hour) with the manager. He's a really nice one. He knows exactly for what I was ordering the faders ... It would be possible to get better prices for faders and knobs, if we make complete orders within our community. Because of the quantity we'll get then better prices. But someone must manage this "shop". So my idea is, just to ask the community if they are interested. We could make collection orders and then get better prices. Albs is working on a web shop but they are not really interested in people ordering two knobs. I can understand this. So if people have a little time, we could collect orders. What are you thinking about this ? Doc

Ich weiss es nicht mehr ganz genau.... aber ich glaube mit Widerstand kam kein einziger Ton.... Du kannst ihn auf jeden Fall rausnehmen (siehe auch Schaltplan oben links). Probiers mal und schrei laut, wenns geht ;D Gruss DOC

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Hallo Matthias, der große Elko ist richtig drin. Die beiden markierten Kondensatoren sind hoffentlich keine Tantal Elkos, sondern normale Kondensatoren ? (Tantal Elkos haben eine Polung !) - Ausshehen tun sie jedenfalls wie normale Kondensatoren und bei denen ist die Polung wurscht. Richte Deine Aufmerksamkeit mal auf die 3 kleineren Elkos. Sind die richtig herum drin ? (kann man auf dem Bild schlecht erkennen). STOP: Ich glaube ich hab deinen Fehler gefunden.... Du hast  R1 (10k) unten links eingelötet. Nimm den mal raus und versuche es nochmal ...... (vgl. Notiz im Schaltplan!) - (Auf diese Falls bin ich auch beim ersten SID reingefallen !  ;) ) Gruß Doc

Caps: The 10uF Cap (C5) at the Audio Out is uncritical. You can use a 10 or 16 V type. For the 470p caps (C1 C2) I would not use the kerko type. Better are FKP caps (Reichelt No: FKP-2 680p). The best solution are styroflex caps (Reichelt No: Styroflex 680p). They don't fit well on the PCB, but they make the best sound  ;D (all values are for the SID 6581. For the 8580 you have to use other values). The other caps I used: C3, C7 = FKP (I don't like ceramic caps in a audio circuit!) C4 = FKP C5,6 = Elko 16V C8 = keramic (just stabilizing, not audio) greets DOC

Wenn ich es richtig sehe (es möge mich jemand korrigieren, wenn ich falsch liege...), hast du das MIOS drauf, aber noch keine SID Applikation. (Das Betriebssystem lebt, aber noch kein Programm da ... ;D) Du musst noch das midibox_sid_v1_6_alpha2_18f (main.syx) via MIDI-OX "sysexen". Du schreibst das du das bereits getan hast. Während des Uploads müsstest du im Midi-Ox Fenster die Zahlenreihen sehen (sowohl im IN als auch im OUT Fenster). Danach macht das CORE einen Reboot und du musst wieder deine Meldungszeile sehen. Danach sollte es klappen. Gruß DOC

Hi, wird wirklich nur EINE Zeile nach dem einschalten ausgegeben ? Wenn ja, hast du zwar das MIOS drauf aber noch nicht die Applikation (Vermutung, denn wenn ich meine SID Box einschalte kommt eine ganze Litanei an Meldungen). Welche Zeile kommt denn nach dem Einschalten ? Gruss Doc

Hi Zeh, ich würde auf jeden Fall einmal die Masse zu dem Taster auf eine Lötbrücke testen. (messen!) Hast du schon einmal einen anderen Taster probiert ? Ev. den betreffenden IC einmal tauschen. Viel Glück Doc

...plug and pray

I had the same proplem with the LED matrix. First of all the LED's were to dark. So I changed the 220 resistors against 180 and its was getting better (surely depends on what kind of LEDs you are using). But the flickering of all leds, was still there. I shortend the cables to the matrix and also payed attention that the PIC is not very near of the DOUT and the DIN. I also put a grounded metal plate between the Core and the DOUT. I also used shielded midi connections (this because of another problem). All these things solved finally the problem. I think we have to pay more attention on noise and grounding issues within the more complex projects. Perhaps it would be useful to make a FAQ about these issues. Also containing basics about noise and ground loops, etc. greets Doc

... hard to give you an advice without knowing the part. ;D My advice: Just test it with a medium load about 0.5A(not core or sid !) and check the output voltage (best: with an oszilloscope, if you have one). If it's getting very hot, its to small. greets Doc

Perhaps a stupid tip: If the bankstick works in another box you should check the inter-connection from core to your Plug. Doc

I had a simular problem. The new MIOS_v1.5b solved it. Don't know if it helps you, but try the newer MIOS. Doc