Messages

1

Software technical support / Re: Playing duophonically with controller keyboard

« on: October 03, 2018, 03:00:56 PM »

Just had a look at the code - looks like it is only monophonic.  I wrote it so long ago I'd forgotten how it worked!  I'm pretty sure the first poly code i wrote was Odytron (which came after Duotron).  I guess it might be possible to update it.  If I transfer it to the new Atx system, I'll try and do a new version for the Atmegatron too.

2

miniAtmegatron / Re: SparkFun Pro Micro

« on: October 02, 2018, 06:45:05 PM »

Hi - that range of Atmegas wouldn't be compatible without significant changes to the code and schematic.  Think it would be possible though, with the necessary changes. 

3

miniAtmegatron / Re: Build problems. Fried board?

« on: July 05, 2018, 10:49:57 AM »

Hi - what temperature did you have your soldering iron on?  As long as it wasn't on mega-hot mode, I'm sure the board will be fine.
R.e. the capacitor you replaced:  if the metal pads have been totally destroyed, you will need to use bits of wire to attach the cap to the traces.  Which cap was it that you replaced?
R.e. the LEDs.  Nearly all these pins are bridged!  I recommend buying some desoldering braid to remove the excess solder. There must not be any contact between the pads.
Also, there's no header in CONN4!  Don't forget to put this in - it won't work without it!

4

Atmegatron/Odytron Hardware technical support / Re: Atmegatron: Potentiometer (distortion)

« on: July 04, 2018, 06:09:10 PM »

1) Yes these 3 are definitely logarithmic.  The others are linear
2) The codes are explained in the datasheet: https://www.mouser.co.uk/datasheet/2/54/tv09-777818.pdf
The 4 in "4225F" means that there is no sleeve to the pot, so it will wobble (some early units actually have this type, because I could not get stock of the other type)
The first 2 in "4225F"  means that there is a centre detent.  There isn't any need for a centre detent with any of the pots.  You use a detent when middle = 0 (but the Atmegatron only uses anti-clockwise = 0).
So technically and electrically PTV09A-4225F-B102 is fine, by you may find the differences annoying!

PTV09A-1025F-A203 will not fit the logarithmic pot holes.  They must be "dual gang" with 6 pins.

5

Atmegatron/Odytron Hardware technical support / Re: Atmegatron: Potentiometer (distortion)

« on: July 03, 2018, 08:59:20 AM »

oh - no 3 of them are different.  You'll see they are bigger.  Here's the part:  Alps RK12L12C0A0E

The bass boost pot is 1k:  Bourns PTV09A-1025F-B102
Rest are 10 k.

6

Atmegatron/Odytron Hardware technical support / Re: Atmegatron: Potentiometer (distortion)

« on: June 29, 2018, 09:09:46 AM »

Hi,
The spec is:  10k, linear, 6mm diameter, D shape, 25mm height. 
I think Bourns and Alps both make one. 
Possibly worth a bit of contact cleaner first?

7

Everything else / Re: EasyUpLoader

« on: June 11, 2018, 11:44:09 AM »

You're using an Atmega328P ?  It should work fine for that, but not for any other Atmega.  This is because I have hard-coded the Atmega328P into the AVRDUDE command in the software.
Also, you should have a cap (think 0.1uF) in series with the reset line in your schematic.  Do you have this?

8

Oscitron Hardware Technical Support / Re: Uni-Five Installation

« on: May 07, 2018, 07:15:38 PM »

Those are up on the downloads page now.

9

Everything else / Re: Midi controllers

« on: May 07, 2018, 01:14:03 PM »

Hmm, well I was actually next to DIN Sync at Superbooth and he has a 101 DIY project that looks amazing! https://youtu.be/wB7yyMU_h24
Ginko have the new sampler slicer module if you're into modular: https://www.youtube.com/watch?v=gl-eEHc66Y8
Not too sure about 8-bit options at the mo.  Most seem to be preassembled.

10

Oscitron Hardware Technical Support / Re: Uni-Five Installation

« on: May 07, 2018, 01:06:12 PM »

Yup, red stripe down on everything I make.

11

Software technical support / Re: Problems uploading software and lights out

« on: April 05, 2018, 09:11:12 AM »

Excellent, glad you got it working. Sometimes the computer needs a restart after installing the FTDI drivers for it to work properly.

12

Everything else / Re: Quick test

« on: March 30, 2018, 01:37:24 AM »

It worked!  Let me know if you have any other issues.  Will delete in a couple of days if all's working now.

13

Odytron / Re: odytron 1.3v

« on: February 18, 2018, 01:40:51 AM »

try it now - there was an html tag missing which makes it download rather than display in a page

14

miniAtmegatron / Re: Is Miniatmegatron open source?

« on: January 28, 2018, 10:50:11 PM »

I would much prefer a simple 7 segment display controlled by a shift register. I could wire up a shift register to a display, but I can't program these, so I guess I will keep trying. thanks

The main issue would be that the a shift register requires 3 data lines, but there's only 2 available for the value LED.  You could make use of pins 0 or 1 if you don't intend on using MIDI.  It would take some careful programming to make sure that the time taken shifting of data to the display didn't halt the playout of the sequencer.
Possibly a simpler alternative would be to put a MIDI connection on the front panel (using mini-jack wiring).  Then control it from an external MIDI controller, or even use the Touch OSC or Lemur templates for a graphical interface.  All parameters are available on MIDI CCs.

15

Software technical support / Re: Flashing from Linux

« on: January 17, 2018, 02:23:58 PM »

Hi - I am really keen to get into using Linux, but I have zero knowledge about it and right now I don't have time (in the middle of developing new synth).  I don't have any Linux machines and even building one seems full of choices (which OS do you use BTW?), let alone working out how to use it!
If I give you the source code for the Easy Uploader, would you be happy to install and run it from Qt?  Qt is free and running it is as simple as opening the project and hitting the green play button. 
cheers, Paul