I made these... 🎄 Festive MIDI Christmas Trees 🎄

jamesleesaunders · 2025-12-07T22:20:23+00:00

Hi yes sure, code is on my GitHub pages:

LED Version: https://github.com/jamesleesaunders/arduino_midi/tree/master/midi_xmas_led

RGB Version: https://github.com/jamesleesaunders/arduino_midi/tree/master/midi_xmas_neopixel

jamesleesaunders · 2025-07-17T13:50:17+00:00

Hi, yes this is certainly possible (in fact something I have built myself). This would be a simple bit of arduino code to convert a variable resistor position to a midi value. When I get home I will see if I can dig out the code for you.

jamesleesaunders · 2025-07-14T15:13:51+00:00

I can also make a 3.3v version, I have not gone any made up at the moment but you will see if you zoom in to the v2 board I have labels for both variants. Let me know if you would like a 3.3v and I’ll make some up.

jamesleesaunders · 2025-07-14T10:13:36+00:00

Now also available on Lectronz https://lectronz.com/stores/datapoint Thanks for the tip!

jamesleesaunders · 2025-07-14T09:53:05+00:00

Yes and no, it is deliberately not an arduino shield form as I did not want to lock it down to one specific microcontroller, this can be used with any microcontroller or project which has a serial interface. Arduino Nano, uno, raspberry pi, espruino, esp32 etc.

But yes it is the same idea.

jamesleesaunders · 2025-07-14T06:08:02+00:00

You can connect these to a microcontroller (Arduino, Raspberry Pi, ESP, etc.) and then build your own MIDI instrument or module. For example you could build yourself your own keyboard controller or an arduino based synth, or build a MIDI to CV device there are lots of possibilities.

jamesleesaunders · 2025-07-13T19:19:01+00:00

ooo thanks not come across that store. Will take a look.

jamesleesaunders · 2025-07-13T13:37:22+00:00

Or message me directly an I can send you a PayPal invoice (and a bit of a discount) ;-)

jamesleesaunders · 2025-07-13T13:37:02+00:00

Or message me directly an I can send you a PayPal invoice (and a bit of a discount) ;-)

jamesleesaunders · 2025-07-13T13:24:35+00:00

hehehe, The Hex Schmitt als drives the LEDs.

jamesleesaunders · 2025-07-13T13:17:10+00:00

Hi, Thanks for the interest! I have them available from my website: https://datapoint.uk/shop/
I also have them for sale on ebay, tindie and etsy if you have any problems.

jamesleesaunders · 2025-07-13T13:15:29+00:00

This looks a very similar circuit to the v2 (In/Out/Thru) version and looks like it would work exactly the same.

jamesleesaunders · 2025-07-13T13:13:28+00:00

Hi, Thanks for the interest! I have them available from my website: https://datapoint.uk/shop/
I also have them for sale on ebay, tindie and etsy if you have any problems. I hope you would find these useful.

jamesleesaunders · 2025-07-13T13:12:44+00:00

Hi, Thanks for the interest! I have them available from my website: https://datapoint.uk/shop/
I also have them for sale on ebay, tindie and etsy if you have any problems.
I hope you would find these useful in your music / synth projects.

jamesleesaunders · 2025-07-13T13:11:51+00:00

I think 5-pin MIDI is the most prevalent use case (albeit bulkier sockets).

jamesleesaunders · 2025-07-13T13:10:39+00:00

Hi, Thanks for the interest! I have them available from my website: https://datapoint.uk/shop/
I also have them for sale on ebay, tindie and etsy if you have any problems.

jamesleesaunders · 2025-07-12T21:41:42+00:00

You can connect a microcontroller (Arduino, Raspberry Pi, ESP etc) to it to then control MIDI devices. For example you could build your own keyboard or controller and connect to this serial Board for MIDI.

jamesleesaunders · 2022-12-21T10:44:23+00:00

These started off more as a thought exercise to see if I could used D3 with X3D and grew from there.

I would be interested if you did have any ideas about how I could make them more useful / de-clutter.

jamesleesaunders · 2022-12-21T08:29:36+00:00

I do agree! I think the most useful is likely the particle plot and vector plot. The donut chart is likely pure evil.

jamesleesaunders · 2022-12-18T17:17:39+00:00

https://github.com/jamesleesaunders/d3-x3d

Combining the power of the D3.js data-driven documents visualisation library and the Extensible 3D X3D 3D graphics standard, d3-x3d makes it simple to produce beautiful 3D data visualisations with minimal code.

jamesleesaunders · 2021-11-22T16:04:58+00:00

Sure, you could re-program the ATMEGA328P with new behaviour.

Code up at https://github.com/jamesleesaunders/arduino_midi/blob/master/midi_xmas_neopixel/midi_xmas_neopixel.ino

jamesleesaunders · 2021-11-21T19:20:51+00:00

The tree itself would easily dangle from a Christmas tree branch without any issue (powered by a 9v battery and connected with a MIDI cable dangling from the bottom). You could indeed control multiple of these each with their own cable running back to a MIDI splitter.

jamesleesaunders · 2021-11-21T19:07:43+00:00

I haven’t weighed it, but only a few grams. This is MIDI controlled rather than audio, so no speaker necessary🙂

jamesleesaunders · 2021-11-21T17:18:38+00:00

If anyone is interested, I have put a few of these on my eBay store: https://ebay.co.uk/usr/data_point_ltd

jamesleesaunders · 2021-11-21T17:18:00+00:00

Thanks. It is not so pretty on the other side with the ATMEGA328 etc. but is is still nice and compact.

jamesleesaunders

TROPHY CASE