#Arduino / #microcontroller #MIDI #drumsequencer project thread, 1/3

This year I finally got into electronics (as a hobby) via the usual route – controlling some lights with an Arduino clone – and since then I’ve been looking for an excuse to design my own PCB.

My friend has picked up DJing so I toyed with building a mini deck, but given my limited exposure to MIDI controllers thought it’d be better to start simple.

2/3

While speccing out photoresistors (for tracking car battery charger status) I remembered seeing a drum sequencer with magnetic wooden pucks as the interface, and started wondering whether I could use them as an input method … by (partially) covering them with Lego bricks! As a bonus, the end "product" should have a pretty nice physical feel to it and even be decently accessible, especially if scaled up to Duplo size.

3/3

Depending on the sensitivity of the resistors and whether half-states are required, it could be possible to get away with less parts (or even zero build plate destruction if a phone camera or a simpler scanning sensor would be used instead) but I happen to have the parts and scraps from a previous project along with the need for an excuse to design a circuit board, so why not? It’s not like they bill by the square inch, right?

And yeah the plan going forward is to drill holes into an uncut build plate that will rest on top of the device (with other controls on two edges to allow for plates of various sizes, perhaps detected via extra LDRs?) to allow quick swapping