megadrum midi not working

[Badmongo88]

Hei

i bought a fullkit 56inputs, I soldered 16 jack inputs following first this diagram http://www.megadrum.info/sites/default/ ... _kicad.png
and i tried connecting a piezo piece to a jack input to different inputs on the megadrum (outer edges on sleeve, and inner ceramic on tip) but using both megadrum manager and a program called MIDI-OX. No midi is registered when tapping (tried different piezos and another jack input with no different in results)

then i got some help and it was said that i was using the wrong diagram, so then i re-soldered the input jacks following the example in the manual.

and i tried again still no midi being registered.

I am using a mono (unbalanced jack cable)

there is signal registered on midi ox when pluging cable in and out on a few of the channles but it seems to trigger the same channle (channle 10) .
also it effects the midilog in megadrummer manager when doing it. affecting different things in there.


is there some configuration that needs to be done for it to register midi from piezo?
am i doing something wrong?

i am not a very good at soldering but i am checked it and all the wires are were they are supposed to be. channels 1-6 not in use and 17-18 not in use
and the solder is solid, there is to my eye nothing creating a short. there is some metal melted on the plastic but in areas where it's of no significance.


Hope there is somebody that can give me some guidance and give me some answers or way to discover whats wrong


Thank you very much

Regards

Pål Erik

[dmitri]

1. Find two metal sticks, e.g. bare metal screwdrivers.
2. Hold metal part of one screwdriver with a bare hand, touch PosJump pin 1 (marked red in the manual) with this screwdriver and hold it in place.
3. Hold metal part of another screwdriver with a bare hand (obviously the other hand) and start touching input pins with this screwdriver.

Do you see activity on the LCD, flashing MIDI LED and MIDI activity on the PC?

[Badmongo88]

ok so i have done it.

i did 1st pin to all other pins and only half responded with light on MD and midi message on MIDI-Ox.
often they came with this message(see picture) only a few at a time, other times it just kept going even after i stopped holding on the pins(like you see in the picture). it was random but mostly happened on the foot controller.

and then i put the cable on and connected the red wire one of the metal objectes and the other metal object on the ring and tip of the jack inputs and they work (the ones that work is. but they might take a few taps and touches to work and then they stop working and they need to be activated again.

so i think the problem is somewhere on the motherboard

[dmitri]

so i think the problem is somewhere on the motherboard

Wrong conclusion. This is HighLevel Auto (on trigger inputs) and Auto Levels (on the Pedal input) in action which are by default enabled. When you feed a signal to MegaDrum, and if HighLevel for inputs or Low/High Levels for Pedal are updated MegaDrum sends a sysex with new detected settings so that MegaDrumManager(FX) could automatically pickup new settings.
And also, I hope you don't think that your body is an ideal conductor. All I wanted to show you with touching the inputs is that both MIDI and inputs (and the hole board) are in fully working order. Your problem is elsewhere - wrong wiring, broken piezo, bad soldering.

[Badmongo88]

so i think the problem is somewhere on the motherboard

Wrong conclusion. This is HighLevel Auto (on trigger inputs) and Auto Levels (on the Pedal input) in action which are by default enabled. When you feed a signal to MegaDrum, and if HighLevel for inputs or Low/High Levels for Pedal are updated MegaDrum sends a sysex with new detected settings so that MegaDrumManager(FX) could automatically pickup new settings.
And also, I hope you don't think that your body is an ideal conductor. All I wanted to show you with touching the inputs is that both MIDI and inputs (and the hole board) are in fully working order. Your problem is elsewhere - wrong wiring, broken piezo, bad soldering.

Ok, good to know. i only got half the pins to give a signal on both pc and on the lcd display. ? by doing your test with the metal object and touch the other pins. only half made any response. the other half made none at all.

no i know a little bit about electronics. not alot granted but a little.

well i will go over my wiring with a multimeter and make sure everything is connected and that there isn't break somewhere and make sure the wiring is according to the diagram. and will test the piezos too.


i did get one channel to work with a piezo. so i guess i'm getting somewhere.


thank you for the help. Much appreciated

[Badmongo88]

Hi again so i went over everything and it is wired correctly and there is no breakage. piezo elements are broken. by the looks of it almost all of them. i need to test them all.

i bought a GO edrum hihat controller and when i connect it to one of the hi hat contoller inputs and i press the sensor down. nothing happens. is this because i need to use a trs jack and connect to both of the high foot controller pedals or might there be another issue?

thanks

[dmitri]

1. Is it a variable HiHat controller?
2. Did you connect it to a low impedance input?
3. Did you connect both signal and power wires?

[Badmongo88]

1. yes
2. i connected it to a low impendence input first, then i tried the high impendance input
3. i wired it so the 40(power) went to ring (low impendance) and from there over to ring (high impendance) (like in the example in the manual) if i understood it correctly


also the piezo that was working yesterday isn't working to day. i did some rewiring due to some bad jack plugs (and i did thourough testing of the wiring) so now i know that it is perfect and fully working.

hopefully i get my second batch of peizos soon so i can make some edrums soon.

[dmitri]

1. yes
2. i connected it to a low impendence input first, then i tried the high impendance input

If switch to high impedance input you also have to set AltIn to Yes.

3. i wired it so the 40(power) went to ring (low impendance) and from there over to ring (high impendance) (like in the example in the manual) if i understood it correctly

I don't quite understand how you wired it. Also you must make sure to wire it according to the pedal's polarity.

[Badmongo88]

okay now i'm a little lost

on my hihat controller there is only a jack input, can't see anything about the polarity.

The wiring i was mentioning was the jack inputs on the md. pin numbers from the manual for MD.

posting a link to the controller, hope thats okey. will remove it if not https://www.amazon.com/Goedrum-GHC-Elec ... B00UBGYBTO