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Please join us at NAMM! MW will be hosting a booth and we would like to invite all manufacturers small and large to join us. We are delighted to support this scene and help provide booth space for anyone who wants to show off their gear and partake in the company of the best group of folks on earth. Please email [email protected] to discuss details. Hope to see you there!



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MIDI Beat Clock (Arduino-powered)
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Author MIDI Beat Clock (Arduino-powered)
solarmodulars
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Joined: 31 Jan 2011
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PostPosted: Thu Apr 14, 2011 12:43 pm    Post subject: MIDI Beat Clock (Arduino-powered) Reply with quote Add User to Ignore List

MIDI Beat Clock
by Tom Whitwell



"Midi / pulse clock divider, with swing, running on arduino"

cool Nice DIY.
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Tombola
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Joined: 23 Jan 2011
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Location: London, England

PostPosted: Thu Apr 14, 2011 1:00 pm    Post subject: Reply with quote Add User to Ignore List

Thank you!

Here is a post in the DIY forum with some details about the schematic/code.


Last edited by Tombola on Thu Apr 14, 2011 6:55 pm; edited 2 times in total
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wetterberg
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PostPosted: Thu Apr 14, 2011 2:21 pm    Post subject: Reply with quote Add User to Ignore List

Tombola wrote:
Will do a post in the DIY forum with some details about the schematic/code.
yes please smile
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matttech
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PostPosted: Thu Apr 14, 2011 2:22 pm    Post subject: Reply with quote Add User to Ignore List

Tombola wrote:
Thank you! There is now a qmmg in the next space along, which makes for a better class of demo.

Will do a post in the DIY forum with some details about the schematic/code.


hey mate - PM me about the filter (not sure what's up with my messages, but some don't seem to have been sent, and yours came up blank)

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reignbear
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PostPosted: Thu Apr 14, 2011 4:04 pm    Post subject: Reply with quote Add User to Ignore List

well this pretty much rules. SlayerBadger!
just out of curiosity what is the depth of the build?
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wetterberg
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PostPosted: Thu Apr 14, 2011 4:08 pm    Post subject: Reply with quote Add User to Ignore List

reignbear wrote:
well this pretty much rules. SlayerBadger!
just out of curiosity what is the depth of the build?
low pin count... arduino... You can probably run this on a tiny breadboard and this:

Note; 0.7"*1.3" SlayerBadger!
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reignbear
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PostPosted: Thu Apr 14, 2011 4:18 pm    Post subject: Reply with quote Add User to Ignore List

@wetterberg Guinness ftw!
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matttech
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PostPosted: Thu Apr 14, 2011 4:25 pm    Post subject: Reply with quote Add User to Ignore List

Tombola wrote:
Thank you! There is now a qmmg in the next space along, which makes for a better class of demo.

Will do a post in the DIY forum with some details about the schematic/code.


hi tombola - you messaged me about a doepfer filter but for some reason your latest message came through blank, and ones i've sent you just go to my outbox, but don't appear to have been sent

you can get me on [email protected] if you want

cheers

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sandyb
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PostPosted: Thu Apr 14, 2011 4:54 pm    Post subject: Reply with quote

matttech wrote:
...
hi tombola - you messaged me about a doepfer filter but for some reason your latest message came through blank, and ones i've sent you just go to my outbox, but don't appear to have been sent

you can get me on [email protected] if you want

cheers


how the PM system works here:
http://www.muffwiggler.com/forum/viewtopic.php?t=29818

hth

sandy
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Tombola
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PostPosted: Thu Apr 14, 2011 6:01 pm    Post subject: Reply with quote Add User to Ignore List

reignbear wrote:
well this pretty much rules. SlayerBadger!
just out of curiosity what is the depth of the build?


It's not especially deep - about two inches?

You don't need to use an actual arduino board, or even the Mini that Wetterberg linked to, just the 28 pin Atmel chip with a (very) few supporting components


DIY module by Tom.Whitwell, on Flickr
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jimmyambulance
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PostPosted: Fri Apr 15, 2011 11:46 am    Post subject: Reply with quote Add User to Ignore List

want to share your code at all?

i've been wanting to make an arduino module and i have 2 unused minis around. i'm not the best at electronics and my concern is the details - did you use protection on your jacks? what kind of signal can it accept/put out? i'm assuming you can use the doepfer-style connector to the 5v?

sorry for all the questions...

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wetterberg
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PostPosted: Fri Apr 15, 2011 2:06 pm    Post subject: Reply with quote Add User to Ignore List

yes, I'm more interested in how the i/o is handled smile I don't need midi at all.
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nickciontea
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PostPosted: Fri Apr 15, 2011 2:23 pm    Post subject: Reply with quote Add User to Ignore List

outputs are straight off the digital outs.. High and low.. real simple.

the digital outs are great for clocking, logic, and gates.

for a simple clock and divider w/0 midi.. i would use an interrupt based program. this way you can reset and even do tap tempo.

i wanna try to make an arduino module with some jacks, knob, and one switch that designates what 'program/module" to run.

Tombola wrote:
Thank you!

Here is a post in the DIY forum with some details about the schematic/code.

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Tombola
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PostPosted: Fri Apr 15, 2011 6:48 pm    Post subject: Reply with quote Add User to Ignore List

jimmyambulance wrote:
want to share your code at all?
did you use protection on your jacks? what kind of signal can it accept/put out? i'm assuming you can use the doepfer-style connector to the 5v?

sorry for all the questions...


If you PM me I'll send the code - it's pretty scrappy, not in a state I'd want to 'publish'

Didn't use any protection. The outs are straight from the digital pins. The point is it's literally an Atmel 328 with a few supporting analog components = cheap in everything but your time.

I've fired probably +/- 6v into the inputs with no trouble. You *should* protect the inputs with diodes etc.

Doepfer connector has 5v. I used the Synovatron proto kit, and cut a trace to get 5v distributed around the board.
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Tombola
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PostPosted: Fri Apr 15, 2011 6:58 pm    Post subject: Reply with quote Add User to Ignore List

wetterberg wrote:
yes, I'm more interested in how the i/o is handled smile I don't need midi at all.


Digital in = simple - easy to read pulses and act on them
Analog in = simple, you have 1024 levels of precision in theory, but I wouldn't expect anything like that in practice, but knobs and simple voltage control should be OK
Digital out = really simple. You should buffer/boost the pulses, but not totally necessary
Analog out = tricky with any precision. Quantizers and midi/cv modules are usually built around micro controllers like the Atmel, but coded properly, and using proper d-to-a converters.

MIDI is actually simple because it's just serial data, which Arduino can read. The circuit on the board is just protection (for your synth/keyboard/MPC) and inversion.
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