Sunday, 4 March 2012

Trigger IO plus IED05 plus a few bits and bobs

So here is the kit
  • Trigger IO
  • ION IED 05 Pads and HH pedal. All the original Cables cut and fitted with 1/4 TRS plugs
  • My Old Home Cinema setup...(some sonyorother)
  • Cheapo Yamaha Kick pedal triggering a rubber/ foam/ steel plate /piezo
  • Rubber/ Steel Plate/ foam Cymbal experiment (made from scrap)

It all works nicely. Kick is fine - just needs less gain and a higher threshold to stop triggers from pedal lifts
Pads all work with a gain of about 9 and are sensitive to really small strikes. I have left the pots in circuit on the pads  but turned all the way to full   Hi hat pedal does the job for now
"Cymbal" is super sensitive so I might have to dumb it down a bit. Need to have more of a filddle with the IO.

Best with phones of course, but nice to fire the guitar and amplitube up and use the pedals for a kind of simple stomp box which is kind of fun with the amp on. I have been experimenting with playing the guitar with one drumstick in my right hand...

Tuesday, 28 February 2012

Trigger IO...looks good

Well the trigger IO works straight out of the box. Just soldered some 1/4" trs jacks onto the end of my original ION cables and away it went.

I have configured my drumset in a 3x3 array. Its not a real set so it need not look like one...

Almost finished a new kick trigger so will post a pic. Dont know what to do with the Edrum - with a proper midi trigger, it might just work.

If anyone is actually reading this in the UK, it can be yours for £10 posted . message me. No guarentee - you have read the blog :)

Thursday, 16 February 2012

Everything is on hold until I get a USB-MIDI module...


Admittedly, my USB-MIDI thingy was only 3 quid and worked fine on my keyboard, but it might not be able to handle the edrum as well. As soon as I can get hold of an m-audio or edirol unit, ill restart the project.

I would love something like a UA 20 so I can plug my guitar in too. (I currently use a guitar-link copy which works but suffers from loads of noise

these go reasonably cheap S/H but maybe not cheap enough...

Sunday, 12 February 2012

Still got the Crosstalk


A real pain, is this. Have gone over the soldering and checked for dry joints etc. I have added some grounding and shortened the cables a little. all unused inputs are grounded and all pots are in place


I still get the odd cymbal triggered off the snare. I still get a rim instead of hi hat sometimes. Still get the odd bass drum instead of a cymbal..

When the xrosstalk occurs, there is no activity on any other channel . Crosstalk velocity is high too.

Might roll back the firmware and give that a go

Friday, 10 February 2012

Ist full test. hmm

Ok so I have stuck pots in all the pads and grounded unused inputs.

My Problems are. Snare triggering unmapped  notes. It is crosstalk, but internal as there is no indication on level meters

Getting  missed notes too. Done tests on this and the input side seems to be working, but get the occasional missed output.

I am just learning to bang the pads so I am up against it. Frustrations make it hard to want to continue


Monday, 6 February 2012

100_3225 100_3227

Its all a bit rough. But I like rough so hey-ho.

The unit works well but I have a bit of annoying crosstalk. There is no Input activity so it might be something like noise on the connection between the board and the USB midi. (I didnt screen it as it was so short - maybe a mistake)

Ill contact admir via the forum for advice.


Actually I think it is fine. I havnt fitted the pots in the heads yet and there are some inputs ungrounded. Also, I had set the thresholds on the snare/snare  rim at 2 so there was low level noise. As soon as I turned those up and frigged the unused inputs, it seemed like it will be all good

Happy days

Saturday, 4 February 2012

First Midi Test

Had another fart about tonight

1. Added a Clamping input to Multiplexer (copy of megadrum's analogue input) to use a Cymbal #2 . Works fact I might do the remaining ones like this. Grounded the rest of the unused inputs.

2. Chopped up my USB midi cable and soldered to board. Will eventually solder to the existing USB socket on the ION board

3. Connected up 9 mini jack sockets (without pots; I have only got one! )

Beer is optional

Also connected up the navigation buttons.

Connected up and it works fine, except I am getting some ghost notes here and there. I dont think it is from the Edrum as there is no channel activity (probably noise on the usb-midi )

To get over it, I tried filtering through the excellent ETRIGGER by aquawicket which worked really well to only send the  wanted notes. 

Next. Add some pots (maybe) and get it in an enclosure (maybe)

..or just stick it on the floor and play. Need to make a kick trigger though

Sunday, 29 January 2012

Multiplexer Added for 15CH Possibilities :)

I am determined to use the latest 16CH firmware so I have added the Multiplexer.

1. Removed the SIL pack and links from the Pearl Board and wired in the 3 digital inputs from the multiplexer
2. Cut the input 7 trace after the 100ohm input resistor and drilled a termination hole either side. (one side goes to input 3 of the 4051 and the other to analogue input 7 on the multiplexer
3. Put a Multiplexer on a little pcb together with the bits and bobs required for the 15ch circuit. Wired to the Pearl PCB.

It works!

Tested the switch inputs too. All that seems fine. Some more pics...

This is how it may look 

Saturday, 28 January 2012

1 Input and Pot connected. Its coming to life...

It lives!

Looks like I will have to add the multiplexer as I get 8 inputs from Input 7 as I have it connected where the multiplexer should go..I kind of expected that.

Anywhoo, I have plugged into a couple of channels and I have no crosstalk and lots of adjustability from the pot so I am a happy bunny :)

Next is to get on with the buttons and make an input panel. (And I am short of 2 100nf caps which is an arse )

Thursday, 26 January 2012

Back to the drawing board

Well the circuit seems to be working thusfar, but the Stripboard is starting to look pretty cack so I have decided to go back a step and try to make a PCB again.

So....printing onto the board with The Toner method failed for me.

What I have done here is reversed the Pearl 8.6 PCB layout and glued it to the Copper side of the board.
I spotted the holes thorough and joined the dots with a sharpie afterwards. Forgive the crap drilling ...:)

Ill etch it in a bit and see if there is any milage in this method...

Monday, 23 January 2012

PIC programmed and Powered Up

Was rather surprised to find my pic programmer, all the way from Canada, on my doorstep .

It was only 3 quid, but arrived super quick and it worked . Its this one

Just plugged into the back of an old laptop, read up for 5 minutes on how to do it and the pic was programmed!

Next was a simple case of finishing most of the digital circuit and the comms with the LCD. I have tucked it all in the corner of my stripboard so, hopefully, I will have enough room left for the Analogue Circuit.

I have left the activity LED on the board for now. It might stay there. 

To be continued

None of the inputs are grounded so there is loads of activity on all channels by waving my hand around. If I grab the Heatsink of the 7805, I have to bring my finger much closer to the pins like in the Tut by raj on the Edrum forum

Sunday, 22 January 2012

LCD Backlight, contrast and Power done

Was going to run the LED on 12V and determine the correct resistors to get the correct current
(in this device it is 80ma ) as my 7805 was only rated at 100ma

In the end I replaced the 7805 for a 1A version. The LCD already has the correct resistor fitted on board to connect to 5V. Found a 22Turn Trimmer for the contrast and that worked fine too.

Onwards and upwards...need to program the PIC soon if I can beg/borrow/make/buy  a programmer

Saturday, 21 January 2012

A couple pf PCB printing fails..Stripboard it is then

So I tried a few glossy magazines and photo paper I had lying around but couldn't transfer the layout onto the copper successfully... I am sure it is just a case of finding the right paper but, well, cant be arsed really.

OK so stripboard it is. Not a bad idea as you have to have a proper read of the schematics which helps with trying to understand it all. I have decided, too, to dump the Pearl layout in favour of the 16CH dig board. Illl stick the multiplexer on the board but link for 8 CH operation so I can expand later on. 

I have made a Start here with the Power supply section. The 5/8 v tests ok and I am ready to continue. (hope my 100ma regulators are man enough ) Need to stick the extra 2 tants to the agnd rail but will sort that later on

Next: PIC and LCD  . Must also remove the jack sockets from the old board and stick on this one. I am hoping that the hole  pitch is the same as the original ION board so it fits back in to the enclosure nicely!

Thursday, 19 January 2012

The hunt for an Drum Module ..Enter eDrum

My Thinking was that, if the pads themselves can offer a decent response, then they may be usable if connected to a Midi Drum Module. Buying a new or even second hand Module was out of the question so I searched DIY and was pleased to find the eDrum site

There are schematics, PCB layouts, component lists , loads of info and a well supported forum. It would seem everything I need to make my own Drum module super cheap.

My idea is to rip the bits out of the ION drum brain and stick a PEARL 8 CH PCB in there (see edrum for details)

1st Job is to make the PCB. Plenty of web resource to show us how to do this...

The IED05

I got the IED05 Super-cheap. Its fun to play but the bundled software has some vile sounds and you soon get fed up with all that. The USB interface basially recognises the IED05 as a multi-axis joystick so any VST instrument is going to have to interpret joystick commands as midi notes

My first experiment was using a glovepie script I found here

It worked well with a demo of Addictive drums, but I had problems with getting the retriggering right and I was constantly fiddling with values to get the sensitivity I wanted.

next I tried the excellent eTrigger   ( ) There was lots of functionality here, but try as I might, there was no response at all from the low velocity ranges so I gave up.

I was beginning to think I was fighting a loosing battle, when I came accross DSP TRIGGER

I plugged on of my pads directly to my Soundcard and  found that, actually, the pad itself has a very good response and a big range. Armed with this knowledge, I went on the hunt for a Midi Drum Module