Thanks for coming and happy noisemaking.

[feurig]

That was a little more scattered than I would have liked but hopefully
it was worth everyone's while.

The schematic for the midi board is in the files section and I will
upload the eagle files shortly.

The male header is: in, out, vcc, ground. to wire it to your benito
you wire in->pin0(tx), out->pin1(rx), and ground to ground. To use the
boards power supply to power your benito you can wire vcc to one of
the +5 pins. You can power them independently or you can also power
the midi board from your benito/and leave the power input
disconnected.

Also.

I looked at the headphone amp schematic and I realized that it would
cost less than a buck a piece at 10 or more. The volume slider being
the most expensive piece.

I will go ahead and order the first 10 and if more than 10 people are
interested we can order more or add it to the group order.


Digikey parts.
1 20 P5148-ND CAP 10UF 25V ALUM LYTIC RADIAL 0 0.07700
$1.54
2 10 493-1286-ND CAP 470UF 16V ELECT VZ RADIAL 0 0.19600
$1.96
3 10 330H-ND RES 330 OHM 1/2W 5% CARBON FILM 0 0.05800 $0.58
4 10 CF1/418K5%RCT-ND RES 18K OHM 1/4W 5% CARBON FILM 0
0.01800 $0.18
5 10 CF1/4105%RCT-ND RES 10 OHM 1/4W 5% CARBON FILM 0 0.01800
$0.18
6 10 399-4266-ND CAP .1UF 50V 20% CER RADIAL 0 0.12100 $1.21
Subtotal $5.65


The volume control is actually more expensive but you may have this on
your bench.

Mouser #: 311-1201F-100K

[greg]

Don,

Do you have the software from this class online anywhere? I've my MIDI
board plugged in correctly to my arduino thanks to your help on IRC
today, but I can't figure out how to read out the MIDI messages.

Thanks!

-- Greg

[Donald Delmar Davis]

Greg,

The code for reading messages is a lot more complicated than that for writing them.

 The writing examples are on the CD which I didnt get you but they are trivial anyway. 

I have a piece of arduino code that Hans gave me that he uses on his midi controlled leds that I am attaching. 

I also discuss to some extent a parser framework in the midi gateway even though the code is for the benito and usb you can get the idea.

http://www.dorkbotpdx.org/blog/feurig/build_your_own_open_source_usb_midi_gateway

[Hans Lindauer]

Note that this code only works for MIDI messages that carry two data
bytes - I realized at the workshop that Program Change and Channel
Pressure messages only have one data byte, so if you have these messages
in the pipeline your controller's liable to get confused.

-Hans