Accented note (right/left hand suggested) r/l: quieter note * : trill, generally three very fast notes on repique/caixa, two or three for surdos Add schematic, start on PCB 7f9b624c8e tweaks layout with input from sam 7f9b624c8e1f1f65b5263dc5de76990cc9e84778 scale([.38,.38,-.005]) surface("FireballSpellVertSmaller.png", center=true, invert=false); } module label(string, size=4, halign="center", font=default_label_font) { color([1,0,0]) linear_extrude(height) text(string, size, halign=halign, font=font); // draw a "vertical" wall to mount a circuit outside the full dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin leads in-line, narrow, oval pads, drill 0.75mm (https://www.diodes.com/assets/Package-Files/TO92S%20(Type%20B).pdf TO-92S package, drill 0.75mm (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot370-1_po.pdf SSOP56: plastic shrink small outline package; 14 leads; body width 5.3 mm; (see NXP SSOP-TSSOP-VSO-REFLOW.pdf and sot190-1_po.pdf VSSOP-8 2.3x2mm Pitch 0.5mm right angle (http://www.molex.com/pdm_docs/sd/467651301_sd.pdf hdmi micro type d right angle http://www.alps.com/prod/info/E/HTML/Tact/SnapIn/SKHH/SKHHLUA010.html tactile switch.