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Getting ready for production

A project log for DrumKid: aleatoric drum machine

A lo-fi digital drum machine which uses randomness to create unpredictable beats. Runs on Arduino, with audio provided by the Mozzi library.

Matt BradshawMatt Bradshaw 04/23/2020 at 12:504 Comments

Lockdown has freed up enough time for me to make some serious progress with DrumKid! Version 6 is now working beautifully. Using an Arduino Nano was a good decision, as it simplifies the assembly process, and the total parts cost for a single DrumKid is still only £21 (when buying a decent number of each component), which is great.

I've now ordered enough components to build about 30 DrumKids. The design is still broadly similar to the one in the videos, but I've added more printed info to the front panel (e.g. what each button does) and made the whole unit 5mm thicker (to allow the Arduino Nano to fit inside, and with the added benefit that it's now slightly comfier to hold).

The final version (for now) will actually be V7, because I made a couple of tiny tweaks to the PCB design before ordering a larger quantity, but to all intents and purposes, this is what DrumKid will look like when it goes on sale:

Hoping to start selling via Tindie in May or June.

Discussions

Roger Labbett wrote 05/06/2020 at 13:21 point

Just checked out the BoM for the breadbord version and I have all the bits in stock, so hoping to find a few hours over the weekend to have a go. 

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Matt Bradshaw wrote 05/06/2020 at 13:34 point

Excellent, good luck! Check GitHub for the latest breadboard layout (Hackaday version is a bit out of date now I think).

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whocares wrote 05/05/2020 at 13:01 point

I'm so excited :D Can I preorder? I didn't find a BOM on github or am I just blind? Would love to build one on a breadboard until the kit arrives...

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Matt Bradshaw wrote 05/05/2020 at 13:45 point

Good point, I had forgotten to upload a recent BOM! Have uploaded one now, let me know if you need any more info. Note that a lot of stuff isn't needed for the breadboard version (battery box etc) https://github.com/mattybrad/drumkid/blob/master/bom/bom_v7.csv I'm not taking pre-orders but as soon as DrumKid is available for sale I'll send an email to my mailing list. Current rough aim is June 1st :) You can sign up here if you're not already on the list: https://mattbradshawdesign.com/

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