microDrum is the most economical and simple way to build MIDI drum trigger.
It’s based on Arduino and can be used with a huge variety of e-pads / e-cymbals, up to 48 inputs!
The output can be sent to a PC and converted to drum sounds through VST like BFD, Addictive Drums and Superior Drummer, etc. … The accompanying software allows features not found in any similar solution: a direct interface with VST (without USB-MIDI cable), record, playback of tablature to practice on, etc...