djamon

Hi TK ! Thanks for taking time to answer our questions. I won't go any further about this subject for now. Let's have a functionnal midibox first :) ! Greets, Dja'

Hi Roger ! Thanks for your response. And yes, despite I think I won't "resolve" this issue for now, I spent some time hanging around on Farnell website and I also found the chip you mentionned. And, it looks like very powerfull, maybe too much (as I say in my mother language : "It would be like shooting a fly with a Bazooka" :rolleyes: ) it could be a kind of solution. But in my own opinion, this chip is a PCB one, and, firstly I don't think I will make my own PCB for it (nor ask someone to make it for me), secondly I don't think I'm able to solder this correctly (too small for my fat fingers :sweat: ). I was thinking about another solution, quite similar to the core8 one as describe in this topic : - Use an 555 timer IC (0.34 €/unit) in monostable mode (see wikipedia description): - It would act as the J14 pin of the core8. - It would be synchronized with the DINx4 clock signal - Need additionnal resistors, capacitors, and maybe OPAMPs (very cheap too) to invert trigger signal or in comparator mode, etc. But I don't know if a decent synchronisation can be obtained from the serial clock of DINx4 bus. And in this way It could react as in the core8. TK do think it can be a reliable solution ?? :tongue:

Hi TK ! Thanks for your response, I understand now why I could not find any info about this point :tongue: . I read the forum article where you describe how sensors works, and I guess that if I want those to work properly on a core32, I would have to design an additional circuit that would : - substitute the J14 pin, by supplying some periodic square signal to charge the capacitance (pfffiou, many questions : is it possible to get a regular pulse signal from the core to synchronize this external periodic square one, etc.), AND - detect the capacitance change if a button is pressed. To minimize cpu-load, from the core and DINx point of vue, each touch sensors would act as a regular pushbutton. I think my current electronics skills are not good enough for now. But I need to refresh some old memories, ten years ago I think I was able to design this... Let's put it aside for now (I'll wait for my single MBLC plus its extension to be finished). Thanks again (further questions or design validation may come later :ahappy:)

Hi everyone !! This is my first topic, so I hope I'm in the right section :ahappy: So, as written in this topic title, I'm planning to build a MBLC with a core32. I have a few skills in electronics (and much more in programming), and I love DIY concepts. But despite I've been hanging around this forum/wiki and http://www.ucapps.de for a while (few weeks/months) and have done a lot of reading, a final question still remains (it may not be the last). In fact it is because i'm planning a core32 instead of the very well documented core8 based MBLC. You could tell me to build my MBLC with a core8, but, in the future, i'm planning to build an additional LC extension on the same core (but it would the 2nd midiport), I'm confident in my programming skills to adpat the MBLC program by myself, but it will be the 2nd phase. For now, I'm just trying to build a cor32 single MBLC. So my question is (snare roll...) : - About the touch sensors of motor faders : the connection diagram pdf (here) shows that they have to be connected to the core8 J14 pin through 4 x 47kOhm resistors, it also says that 10 kOhm resistors must not be soldered on the DIN board. What about connecting those sensors to the core32 ? core8 J14 pin hasn't any (visible) equivalent ? how to connect touch sensors on the core 32 ? Thanks in advance for any answer ! (Hope I have not miss an old post that explains this...) Bye !!!