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DO-35"/> Dual Operational Amplifiers, DIP-14/SOIC-14 | | R23, R24, R25, R27 Switch, triple pole double throw, illuminated paddle, http://www.nkkswitches.com/pdf/gwillum.pdf switch single-pole double-throw spdt ON-ON D Screw terminal, single row, 01x03 D 2x5 pin shrouded header 2.54 mm spacing Pin header 2.54 mm 2x5 Quad operational amplifier, DIP-14 A-1135 2 8 pin DIP socket A-004 4 Knobs Screws, nuts, and spacers (see [build notes](build.md)) | | | R3, R21 | 2 | | | R20, R22 | 3 | 100R | Resistor | | | | D 2 pin Molex connector 2.54 mm 2x5 Audio Jack, 2 Poles (Mono / TS) | | | | U3 | 1 | Conn_01x04 | Pin socket, 2.54 mm, 1x10 | | | | | J12 | 1 | LED | Light emitting diode Push button switch, normally closed, generic, four pins D Momentary Switch, single pole normally-open tactile switch Omron B3F right angle (https://www.we-online.com/katalog/datasheet/692122030100.pdf USB 3.0 Micro B USB SMD Type-A Receptacle Right Angle series (http://www.dialightsignalsandcomponents.com/Assets/Drawings/2D_Drawings_DrawingDetailedSpec/C17354.pdf RGB LED NeoPixel addressable Kingbright, dual LED, 3.5 x 2.8 mm Surface Mount Tactile Switch for High-Density Mounting, 7.3mm height, https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3fs.pdf C&K Components SPST SMD PTS645 Series 6mm Tact Switch with High Contact Reliability, Top-actuated Model, with Ground Terminal Middle Stroke Tactile Switch for High-Density Packaging with Ground Terminal, without Boss Ultra-small-sized Tactile Switch with Pegs, https://www.ckswitches.com/media/1462/pts125.pdf Button Tactile Switch for High-Density Mounting, 3.1mm height, https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3fs.pdf C&K Components SPST SMD PTS645.

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