durchgedreht

It's parallel. I'm not as newbie in electrinics ;D But thanks for a guess. I'll start using the pedalboard from friday on and will try a better switched power supply with 1A. I donn't mind waiting for 30 seconds but I don't believe the capacitor will last as long for being charged. My best guess is up to the cheap midi interface. I will try with another soundcard. It's really strange that it'll leach so much energy. But I'm not in the Midi spec.

That's what I thought first too. But it works well. Anyway my main problem is the voltage trouble. Is the power supply not sufficient?

Your're absolutely right! This will avoid confusions. I just wanted to clearify thewhole process as some newbies could get quicker into it. And again: Great feedback here in the forum, I'm really impressed!

Hi, I use a Roland 9V 500mA power supply from my Midi - Keyboard Edirol PSR30. I use the MidiIO128 for a midifizised basspedal. I would like to use it with Midi Phantom Power on the outer pins as i already do with my guitar midi board. Therefore I did the following: 1) I added a Stereo switch that connects the two power supply cables from my CORE to either the phantom power pins or the normal power supply jack. 2) To indicate the Power on each input (midi and power supply), i built a LED+10k resistor after a recifier circuit (four diodes + 10uF Kondensator). This will let the LED light even with ACDC and nop mind what polarity. What happens now is the following: I connect the Power supply and switch to it. The light will glow (the red HiGrade LED from the power supply circuit). When I connect my USB Midi Interface (Thomann 20EUR), the light will not glow any longer and the CORE will not work. When I wait about one minute before connecting the USB MIdi interface, the light will glow less for a moment, but then return and all works fine. I cannot believe, the Modules (CORE + 1 x DIN_4) will consume so much power??? Also it seems the Roland Power supply is not DC as it states 12,5 V DC??? Second question: Can I use a 300 Ohm resitor to ground with LED in the 5V to ground pins of the D_IN4 Module to indicate the Power of the Modules, or what calue would you prefer???

Hi, to get up and running there are three mandatory steps: 1) Burn (or buy) the Bootloader Now there will be Midi - Events visible if you use a Midi Monitor (MIOS Studio has a built in one!) 2) Install the MIOS-Operating System. The file can be found on the CORE module page. Now you will get only one Midi Event when the Module will be connected to the power supply and when it will be disconnected. [update:] The MIOS Operating system will be uploaded using the Bootloader (the bootloader is just for installing the system!). MidiIO128 is built upon the MIOS Operating system and cannot work alone nor can it be installed directly o the bootloader without MIOS Operating system. 3) Now install the 128MidiIO application. Then the buttons will work! For all steps I used MIOS Studio. For confusion, the Serge-Tool states transmission when uploading the midiIO128 too early and even states correct received packets! But it will not be installed!!!! Hope this helps, Dennis

You are right! After 60 seconds everything was working perfectly. I also like MIOS Studio better and did already use it ;D Thanks for your help!

Hi, I installed MIOS via Bootloader successfully (only one Midi Message now on startup). I use the Sysex tool form Serge and it says Block 100, 200, 300, 400, 500 and then nothing - No Ok, no error. But the MidiIO will not work, when I shorten two button contakts and look in the Midi-Monitor. In the manual it says, one has to shorten the IO modules, but I don't know what that means!? Do I have to link two pins on my Input board? Or maybe I have connected the DIN module the wrong way? Please have a look at the pictures. The 5 Pin Cable is connected to the 5 pins below (like one would guess anyway). PS: The Blue/White connector is my button-emulator ;-) Thanks!

Hi, I'm building a Core Modul on the Design on T. Close v3. The Midi Out has strange(?) 10V. Seems incorrect to me, but I'm not in Midi-Specification. The Voltage supply of the Microcontroller and smaller Chip seems korrect (5V at all points in the introduction). Any Idea? Thx, Dennis Update: Seems to be my fault: I just was on AC not DC. With DC I get 5V+ on both outer Pins to the Groud Pin (middle). This should be correct, or? Additional Info: I'm just before loading up the syx file via midi into my bootloader and don't want to blow up my [expensive] soundcard. I even ordered a cheap Midi IO Cable to go for sure now. I can use it anyway for Laptop+Synths.

Ok, have found something about it. It seems like one can use some diodes to create an input matrix to gat a multiply of inputs with a few inputs (say 16 x 16 = 256 instead of 32). The adressing is made in software then. Nice idea, but I don't use so many inputs. I will go for a small 1 Input and 1 Core version of the 128IO project. Hope to report the project soon ;)

Thanks for the very quick response. If I can use as little harware as I need (like in my case (13 in for the pedals and the rest up to 32in for program changes) and configure it what exactly is the advantage of the matrix thing?

Hi, I want to midifize a Basspedal. I found some threads that the 128IO Project is the one to go for. I also found infos, one could go for a 32DigiIn Module and a Core modul, because I only need 13 Pedal input switches to connect to the bass pedal. My Questions are: 1) As the 128 IOs are concatenated, I'm sure, the 32 Ins are now in the lower range and must therefore be mapped differently in the software. I also found a thread about "Switching Matrix", but didn't find the right insert point. Any Infos welcome. 2) When I use a uController with bootloader from the nice german shop, I do not need to flash anything, right? I will have the boot (or whatever) functionality to get up and runing the circuit and the havt to setup the Chip via Midi and a special PC software? 3) I would like to use the pedal as Basspedal and send the Note events to a synth. But I would also like to send Program changes with additional buttons. I think this is also only a configuration issue when using One DigitalIn Module? 4) Can I send the Midi events to different channels? Best would be: Midi Channel One: Note events and change events to Synth by buttons/basspedal Midi Channel two: Change events to guitar FX Midi Channel three: Change Events to DAW (Cubase) I know, many questions are somewhere, but for you cracks it's just some words- Thanks a lot! :D

Hi, I want to use an organ floorboard to control a synth with my feet (I'm playing guitar but as I was playing keyboard for a long time, I'm still fascinated by synth background sounds - but can't play them :-X) A Midi organ board costs more than 250 EUR. So I want to add Midi functionality to a 'normal' organ board, what can be bought for less (also I like my solder iron ;D). To make it clear: It is a normal Keyboard layout with 13 keys from C to C' and every key simply works like a button. My question: 1) Is it possible to use a core modul with a digi(or analog?)-in modul and a certain configuration to send the note on / note off Midi signals to my synth-host (I don't want touch/velocity detection or how it's called in english, just a simple)? 2) Can I also use transpose up und down by two additional buttons? 3) Can I set a fixed key velocity by a poti for all events? 4) What about aftertouch (also fixed value for all events)? 5) Do I have to set up anything on my own or is there already somebody who has done equal work? THX you all, Dennis