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Messages - dancake2011

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1
Hardware / Re: Using a FSR for HiHat controller
« on: March 03, 2012, 10:14:22 AM »
Ashamed to say I bought a Trigger IO now.  My Edrum was almost there, but I didnt know where to go next.

Thanks though to Admir and forum users for help on this interesting project.

2
Hardware / Re: Im confused
« on: February 23, 2012, 10:46:28 PM »
There are Analogue and Digital Schematics. Your inputs are on the Analogue Schematic. The analogue boards connect at the headers on the digital board

I use 12V for my supply (. You have a 5V and 8V regulator on the Dig board so your supply must be above that)  9V might work, but I am not sure

3
Off-Topic / Re: newbie here
« on: February 15, 2012, 02:56:56 PM »
Hi.

Have fun. many have had success. i am almost there.  Waiting for a cheap decent USB-Midi device to come along. I hope it will solve my problems.

We can get 2-2 M audios here for about 30 quid second hand....

4
Hardware / Re: Using a FSR for HiHat controller
« on: February 15, 2012, 02:44:00 AM »
Well I swapped the Cables around and it didnt work at all :(  kind of expected really; it's hard to imaging it would have worked at all if it was wrong.

Next thing I have done is brought the USB Midi device out from inside the enclosure , and shielded it.

Still the same result. Midi ox is showing lots of unmapped notes (ie Snare is D2 but there are a lot of F#1 and E-1 )

Hmm. Don't know what to do now . A new decent USB device is going to be 40 odd... I could always make one :)

5
Hardware / Re: Using a FSR for HiHat controller
« on: February 14, 2012, 05:38:59 PM »
uh oh...My USB board has + and - on it. My 5V is going to - and my GND is going to +
I thought I was being careful when I was looking at the chopped of cable in reverse..maybe not.

Cant test now. Just got a bollocking off the wife for being noisy looking for my soldering iron. Where IS it?


6
Hardware / Re: Using a FSR for HiHat controller
« on: February 14, 2012, 05:05:09 PM »
Hmm.

As soon as the USB plug makes contact with the PC laptop socket, the Edrum restarts without fail. (Carries on working afterwards ) I wonder what could cause that?

7
Hardware / Re: Using a FSR for HiHat controller
« on: February 14, 2012, 11:12:39 AM »
I might try a different midi trigger - especially as the crosstalk does not appear on the Input side graphically.  (And the fact that unmapped notes are playing - even if i set all notes apart from the snare to 00 I still get the odd ride CC note. )

The midi unit has been in my possession for a while though and worked fine with my Midi keyboard / Steinberg THE Grand .  It was also used in my first (abandoned) Edrum project which was using a Yamaha DD-11 as a drum module and mesh heads.
I still have Addictive drums so I am using that this time around.

I will be made up if I can make my edrum work. My trigger IO comment was that it would work "out of the box" In reality I cant afford one right now ! I know the Edrum design is good because so many people have had success.

Ill keep trying. I have an old laptop with a game port so I might give that a go to test the input with Midi Ok. to prove the Edrum

One more piece of evidence for Admir - My Edrum is rock stable and doesnt crash at all however If I plug in an input or my usb cable, the Edrum unit always restarts once . could this be evidence of a deeper issue or "do they all do that"

8
Hardware / Re: Using a FSR for HiHat controller
« on: February 14, 2012, 04:26:54 AM »
cool.

I have kind of put mine on hold due to crosstalk issues. I dont get crosstalk as in Channel activity on other channels (on the indicator)
but I get midi notes that are completely unmapped.  (I get a Ride CC note off the snare for example which isnt mapped on any of the 16 Channels ) I get a rim note off the hi-hat. (the rim is randomly  played instead of the hi hat...dual piezo is OFF btw)  Again the rim midi note is not  mapped to any input.

I am starting to think it is my midi-usb adaptor, but as my installation is quite rough, it could be that :) I am seriosly thinking of a trigger io but my edrum is so close to being great!

9
Hardware / Re: Using a FSR for HiHat controller
« on: February 13, 2012, 12:08:34 PM »
I like that!

I was considering the same solution with a bend resistor, but I like what you have donw with the foam. What kind of resistance change do you get from open to closed

10
Hardware / Re: Pearl PCB LCD wiring help
« on: February 10, 2012, 12:08:04 AM »
Is it 8.6 you are following?

If you look at the board, the 2 VS are connected to ground and the 2 VD to 5 volts.

I connected VS and VD to the 5 Volt backlight supply on my LED and bridged accross to pin 1/2 from there (check the schematic).  I used the other VD for the Midi LED

Remember you will need a contrast pot too. I found it easiest to solder this directly to the LCD as there is no provision for it on
the 8.6 pearl board.

Check your LCD Backlight info too. Mine had current limiting resistor onboard so you could connect directly to it. It draws 80ma on its own so I used a 1A 7805 just in case. Yours might need a seperate current limit resistor.

I have got the pearl board running with some mods. I have written a blog about my experiences here http://ied05toedrum.blogspot.com/

I have just fitted some pots to my pads so I need another update!


11
Hardware / Re: Analog inputs without analog board... things to remember
« on: February 07, 2012, 11:19:25 AM »
Hi Admir.

I am using this setup on 1 input on my Multiplexer board. (I needed 1 more input but didnt want to construct another full analogue board.)

It actually works well with my pads. I only just get an overflow on the very hard hits so I will stick a pot in to bring it down a bit.

This is what megadrum uses I think. (In fact, I think some people are using a trick muliplexer that is safe with piezos direct-in )

I brought this old thread up as I mentioned it in another post


12
Hardware / Re: Crosstalk...?
« on: February 07, 2012, 05:44:17 AM »
Cheers, Admir.

Must admit, the assembly has kind of "grown" rather than been thought out, hence the long cables and untidy looks!

I will add some decoupling and get the resistors in place. Have also put a shield on the midi cable.

Regarding shielding the case, this shouldnt be a problem so Ill give that a go, too

made a kick pedal last night. I wonder if it will work :)


13
Hardware / Re: Crosstalk...?
« on: February 06, 2012, 12:44:55 PM »
Hmm

It seems like noise coming from my rim piezo (which didnt really work..:)  )
I had turned the retrigger right down on 4/5

Now I have ground i5 and i3 (I need to make a kick trigger) it all seems cool.

These ION pads are a bit nasty though. After the kick pedal, the next job is to make a nice mesh snare and some kind of hi hat.

My pedal for now is a switch. I have removed the input cap, and used a 47k pull up resistor to send the input high .I  send the input to ground with the fottswitch; Works fine when set hi hat control to "pot" so i guess its ok?

14
Hardware / Crosstalk...?
« on: February 06, 2012, 11:12:54 AM »
Hi.

My project is coming along.

I am at the final stage, but I have noticed the odd unwanted note (for example a random cymbal sometimes plays on the snare)

I assume there is a grounding issue somewhere.

*NB There is no activity on other channels - ie no bleeding

Couple of questions.

1- Decoupling. Should I add a couple of Tants on my Multiplexer board? I have only 2 in the entire circuit - on the power supply.

2. Should the short midi connection between the main board and the USB midi device have a shield? its only a couple of inches long.

3. NB My inputs are direct into the Op amps (and 1 is a clamping input on the multiplexer like megadrum ) aApart from on snare, my Pots are not connected  yet so there is no resistor accross the input. (pots will be fitted in the Pads ) Maybe this is the problem all in itself? NB all the unused inputs ARE grounded.

should I be looking for anything else?

Here is my layout. Its ugly as hell, but it is almost perfect. Thank you so much, admir for sharing your ideas with us!


100_3225 by Dancake2010, on Flickr

theres a vid here http://youtu.be/ptgkIGwcaXE

15
Hardware / Re: Hi Hat on Firmware 1.1
« on: January 29, 2012, 01:57:33 PM »
Well I have modded the Pearl PCB and linked in a 4051 ;)       (Details on my boring blog...)

Looks like I have working channels so it is on to the next stage.

I have briefly tested the hi hat input. Set the type to "switch" and switched 5v onto input 1. It looks like I get note on/ note off doing this but there is no level displayed. Is this normal? or Should the hi hat level be displayed?



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