MIDI Patch Controller with Keypad
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Posts: 46,084
Hello Basic Stamp Group,
I just joined today. I am in need of some ideas for code and circuits
to build the following.
A MIDI patch controller that uses a keypad to select
1) the channel to send
2) the patch number to send
I have a need for such a device for my guitar effects / guitar
synthesizer equipment.
There are many controllers on the market that can be programmed and
there is software for PC that do this. These are either too big or do
not have a keypad. I am going to build a small unit that can either
mount / clip on the side of a microphone stand or double-sided sticky
tape to my guitar.
I only need to send. No MIDI in or MIDI through is needed.
Thanks in advance. I look forward to the group ideas.
Thanks,
Bill Bores
I just joined today. I am in need of some ideas for code and circuits
to build the following.
A MIDI patch controller that uses a keypad to select
1) the channel to send
2) the patch number to send
I have a need for such a device for my guitar effects / guitar
synthesizer equipment.
There are many controllers on the market that can be programmed and
there is software for PC that do this. These are either too big or do
not have a keypad. I am going to build a small unit that can either
mount / clip on the side of a microphone stand or double-sided sticky
tape to my guitar.
I only need to send. No MIDI in or MIDI through is needed.
Thanks in advance. I look forward to the group ideas.
Thanks,
Bill Bores
Comments
This should not be too difficult.
The MIDI speed is 31250 bauds. You should buffer the Stamp output thru TTL
inverters (74LS14 + 7405 for exemple), to ensure sharp square edges and
power.
The final output is connected via a 220 ohm resistor to pin 5 of the MIDI
OUT connector of the patch controller.
The pin 4 must be connected to the + 5V via a 220 ohm resistor as well, and
pin 2 to the ground of the patch controller (it should not be connected on
MIDI IN connectors, to avoid ground loops).
The rest is... programming, and depends on what you want to do with your
keypad. I suppose you'll type a patch number, and send it with an 'ENTER'
key. Or you could preset a patch numbers to each key, and select the patches
with only one keypress. If you're playing live and quick, this may be the
best system.
Hope this helps a bit...
Phil.
Original Message
Subject: [noparse][[/noparse]basicstamps] MIDI Patch Controller with Keypad
> Hello Basic Stamp Group,
>
> I just joined today. I am in need of some ideas for code and circuits
> to build the following.
>
> A MIDI patch controller that uses a keypad to select
>
> 1) the channel to send
> 2) the patch number to send
>
> I have a need for such a device for my guitar effects / guitar
> synthesizer equipment.
>
> There are many controllers on the market that can be programmed and
> there is software for PC that do this. These are either too big or do
> not have a keypad. I am going to build a small unit that can either
> mount / clip on the side of a microphone stand or double-sided sticky
> tape to my guitar.
>
> I only need to send. No MIDI in or MIDI through is needed.
>
> Thanks in advance. I look forward to the group ideas.
>
>
> Thanks,
>
> Bill Bores
Derenne Philippe wrote:
> Hi Bill,
>
> This should not be too difficult.
>
> The MIDI speed is 31250 bauds. You should buffer the Stamp output thru TTL
> inverters (74LS14 + 7405 for exemple), to ensure sharp square edges and
> power.
> The final output is connected via a 220 ohm resistor to pin 5 of the MIDI
> OUT connector of the patch controller.
> The pin 4 must be connected to the + 5V via a 220 ohm resistor as well, and
> pin 2 to the ground of the patch controller (it should not be connected on
> MIDI IN connectors, to avoid ground loops).
> The rest is... programming, and depends on what you want to do with your
> keypad. I suppose you'll type a patch number, and send it with an 'ENTER'
> key. Or you could preset a patch numbers to each key, and select the patches
> with only one keypress. If you're playing live and quick, this may be the
> best system.
>
> Hope this helps a bit...
>
> Phil.
>
>
Original Message
> Subject: [noparse][[/noparse]basicstamps] MIDI Patch Controller with Keypad
>
> > Hello Basic Stamp Group,
> >
> > I just joined today. I am in need of some ideas for code and circuits
> > to build the following.
> >
> > A MIDI patch controller that uses a keypad to select
> >
> > 1) the channel to send
> > 2) the patch number to send
> >
> > I have a need for such a device for my guitar effects / guitar
> > synthesizer equipment.
> >
> > There are many controllers on the market that can be programmed and
> > there is software for PC that do this. These are either too big or do
> > not have a keypad. I am going to build a small unit that can either
> > mount / clip on the side of a microphone stand or double-sided sticky
> > tape to my guitar.
> >
> > I only need to send. No MIDI in or MIDI through is needed.
> >
> > Thanks in advance. I look forward to the group ideas.
> >
> >
> > Thanks,
> >
> > Bill Bores
>
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