modularkomplex

@pay_c: Das funktioniert wie gewünscht, d.h. alle Stückzahlen der hinzugefügten Warenkörbe werden zu deinem aktuellen Warenkorb addiert. @all: Wir können ja hier erstmal für alle Module (und evtl. komplette Projekte) Warenkörbe zusammentragen und dann im Forum antackern (Sticky). gruß Mike

Moin, seit einiger Zeit besteht bei Reichelt die Möglichkeit, Warenkörbe zu speichern und über einen Link öffentlich zugänglich zu machen. Ich denke das können wir ganz gut gebrauchen, um sich mal eben alle nötigen Teile für z.b. ein Core-Modul in den eigenen Warenkorb zu beamen. Das macht bei manchen Teilen nicht unbedingt Sinn - wer bestellt schon einen einzelnen 100Ohm-Widerstand - aber man kann den übernommenen Warenkorb ja nach belieben editieren. Als Beispiel habe ich hier mal einen Warenkorb für einen Core angelegt: Core Warenkorb Warenkörbe für die einzelnen Module könnten wir hier veröffentlichen und TK könnte sie evtl. auf der ucapps-Seite zusätzlich zur Orderlist verlinken. Nur mal so als Idee. gruß Mike

One thing to note regarding the orderlist: I've recently ordered the oscillator with the given partnumber "OSZI 14,318000" at Reichelt - what I've got is an 14,31818 MHz one. Mike

Whooa, SLP and me both only wanted to make sure that nobody is being disturbed with an eventual bulk-order organized by us. More precise: We just wanted to know if Midimike or SmashTV are offering this PIC in the near future. We did'nt want to push anyone to anything. I am interested in the new possibilities with the new PIC and the actual SID-Version. If it is then in the final v2 - great. If not - No problem I'll find a use for them. But at the actual building speed of my Step C CS the v2 is being finished before my box is complete. (OK, its sounding already - but with no CS its half the fun) Peace Mike

@SmashTV: SLP an me are discussing a bulk-order of PIC18F4685. As we dont want to disturb your (or Midimike's) business, SLP first asked both of you if you are planning to sell this PIC in the near future. Midimike told him that he is waiting for the ok from TK to sell those PICs. Mike

Hey Sonicwarrior, will nur mal kundtun, dass ich erst durch deine Postings zu Sammelbestellungen (SSM und THATs) hier auf auf das Synthesizerforum aufmerksam geworden bin und mich dann auch an dortiger Stelle teils daran beteiligt habe. So gesehen sind deine Info-Posts hier schon wirksam - die Wirksamkeit zeigt sich nur nicht unbedingt auch hier. gruß Mike

I would prefer the programmable counters. I like the warm touch a small amount of drifting vco make. On the other side, if we want stable operation in - lets say - more than 4-5 octaves, we need a more precise timing. We also can do a slight drift with the software, switchable - for those who do not want it. Additional to the matrix-design we could use one programmable timer-chip (8253 or 8254) per cem3396 (the Matrix6 / 1000 uses 4 chips for 6 3396). We would get 3 independant square-waves. Two for use with the waveshapers and the third for an additional sub-oscillator. Mike

Thank you Andrew for your hints. I've read a bit more about the PWM-function of the PIC in the datasheet and did some calculations with the given equations. As far as I can see it isn't possible to generate the exact needed frequencies (or multiples) for a equally tempered scale. For example: The closest frequency to an A (440hz) I found which could be generated is 441,38hz. In addition, for a full scale, many different clock-divider settings would be needed. I the PWM-generation of the PIC really that restricted or do I get something terribly wrong? So, two possible ways for timing are left. Interrupt toggled pins or an external timer. I dont know if the pin-toggling method is a good idea. If we want to cover a range of 10 octaves, the highest frequency needed is nearly 16khz. Is this possible without limiting the other tasks of the PIC to much? Mike

Hmm, don't know if I get it right. We could use a normal I/O for generating the timing signals? Sounds plausible. Mike

I thought we could use the pwm-outputs from the PIC for the dco timing-signals. But now I've read somewhere that its not possible to generate frequencies below 1khz or so. Anyone got ideas for a workaround? Clock-dividers? Mike

Müssens denn unbedingt die LC-Typen sein? Den 24C512 gibts für 2,55 Euro bei Reichelt. Mike

Thanks Ilmenator for the informations regarding the Matrix1000. It seems all in all less complicate to be done than assumed. Thanks Andrew for your comments, too. Sure, it's not the goal to clone the Matrix1000 but we can learn much from the hardware-design. Mike

So whats the benefit using them? I don't know much about digipots, but have seen only up to 8bit ones. Once you want presets you will have to use AINs. You will need a way to send the cv to the 3396, too. It makes no real difference using real Pots or Encoders on the input side. The application should be able to handle both of them. The 3396 interfacing is the same. Mike

Reading a bit about multiplexing and sample-and-hold I think I've realized how that works. Attached is a simple flow-chart for one 3396. Could anybody have a look at it? Does that work this way? Mike

I've got my delivery yesterday. Well packed in tubes :D Some thoughts about the design: - We need 2 or 3 ADSR and a LFO (per chip) which could be done by the PIC. - An additional noise-source would be fine - I suggest a modular concept like the MB SID: Someone can build just a monosynth or a couple of them (up to 6) for polyphonic one. - In a polyphonic setup most of the cv could be routed to all 3396s. If I'm right only gain, filter frequency and both timing signals have to be seperat for all 3396. I have to learn more about sample-and-hold and multiplexing cv. Any suggested links? Mike

Das ist mir jetzt leider nicht bekannt ob das funktionieren würde. Ich kann mir aber gut vorstellen, das es nicht klappt oder die 512er nicht in voller Kapazität (also wie 256er) genutzt werden können. Mike

Ja, das sollte funktionieren da IIC ein Bussystem ist. Mike

Sorry for that, ilmenator. Good for my conscience you got that "instant buy" offer. Mike

@Ilmenator: the one that bidded you out this time was me :o, couldn't resist to get this babies. As you already got 6 of them, I thought it isnt so bad bidding for them. Mike

You could desolder the original-caps, but they are ceramics too. I wouldnt do that for myself as new ceramic-caps are very cheap here. Mike

You could tin the corresponding SID-Pin so it gets thicker and hass contact again. Mike

Die Platzierung der einzelnen Bänke folgt genau den Bezeichungen auf dem Bild unten auf der Bankstick-Seite. Bank A ist IC1, Bank B IC2 usw. Bei anschliessen kann man sich am einfachsten an dem Masse-Pin orientieren. Dieser weist auf dem Core-Modul Richtung Spannungswandler, auf der Bankstick-Platine in die Richtung von IC5. Oder anders gesagt: Wenn beide Platinen direkt nebeneinander liegen, so dass j4 (core) und jp1 (bs) parallel sind, müssen diese 1:1 miteinander verbunden werden. Gruß (ein anderer ;)) Mike

Hi Alex, Im using a paired wire with 0.14mm2 with crimp-connectors on both ends, works fine. Picture is from Reichelt showing the 3-pole version. Mike

Finally :D The input plug, oh my... ::) was the last thing I'm thinking of. Hope you have learned a bit about troubleshooting while solving the problems. Mike

Do I get it right? You now get 1,7V measuring on the 5v-input? Or do you mean the output? The low voltage after switching off is normal, the electrolytic caps are storing some power. Mike