A trill, generally three very fast notes on repique/caixa, two or three for surdos Add schematic, start on PCB with on-board components Added hard sync to schematic, laid out PCB with 2 copper strips net tie solder jumper bridged SMD Solder 3-pad Jumper, 1x1.5mm rounded Pads, 0.3mm gap, open SMD Solder Jumper, 1x1.5mm Triangular Pads, 0.3mm gap, pads 1-2 Bridged2Bar with 2 copper strip, labeled with.