LoChord
kiwifruit0
An open-source version of the popular midi device: HiChord
Components (38)
| Reference | Value | Description |
|---|---|---|
| U1 | WT0132P4-A1-N16R32 | Wireless-Tag WT0132P4-A1-N16R32 ESP32-P4 module, 16MB flash, 32MB PSRAM, no radio, 5V supply. Pin order mirrors the physical module edges. |
| U2 | AMS1117-3.3 | 1A Low Dropout regulator, positive, 3.3V fixed output, SOT-223 |
| U3 | LP5907MFX-3.3 | 250-mA Ultra-Low-Noise Low-IQ LDO, 3.3V, SOT-23 |
| U4 | USBLC6-2SC6 | Very low capacitance ESD protection diode, 2 data-line, SOT-23-6 |
| U5 | ES8388 | Everest Semiconductor ES8388 low-power stereo audio CODEC with headphone amplifier, QFN-28 4x4mm. I2C (2-wire) or SPI control. No hardware reset pin - reset is register 0x00 bit SCPReset. |
| C1,C7,C8 | 1uF | Unpolarized capacitor |
| C2 | 100uF/10V | Polarized capacitor |
| C3,C5 | 22uF/25V | Unpolarized capacitor |
| C4,C6,C10,C11,C13,C14,C16,C18,C20,C23,C26 | 100nF | Unpolarized capacitor |
| C9,C12,C15,C17,C19,C21,C22 | 10uF | Unpolarized capacitor |
| C24,C25 | 220uF/6.3V | Polarized capacitor |
| D1 | GREEN | Light emitting diode |
| FB1 | 600R@100MHz | Ferrite bead |
| J1 | USB-C 16P | USB 2.0-only 16P Type-C Receptacle connector |
| J2 | DEBUG USJ | Generic connector, single row, 01x04, script generated (kicad-library-utils/schlib/autogen/connector/) |
| J3 | JOYSTICK_NS | 5-way 0.5mm FPC for the Nintendo Switch analogue stick module (2x 10k pot + click). Pin order to be confirmed against the module; the three signal pins land on ADC1-capable GPIOs so an order error is a firmware fix. |
| J4 | LCD_NV3007 | 8-way 0.5mm FPC for the 2.79in 428x142 NV3007 SPI bar panel. PIN ORDER IS THE COMMON 8-PIN CONVENTION AND MUST BE CONFIRMED AGAINST THE PANEL ACTUALLY PURCHASED before ordering boards. |
| J5 | PJ-320D | Audio Jack, 4 Poles (TRRS) |
| R1,R5-R13,R24 | 10k | Resistor |
| R2,R3 | 5.1k | Resistor |
| R4 | 470R | Resistor |
| R14 | 22R | Resistor |
| R15 | 0R | Resistor |
| R16 | 100k | Resistor |
| R18-R21 | 33R | Resistor |
| R22,R23 | 4.7k | Resistor |
| R25,R26 | 10R | Resistor |
| RE1-RE3 | EC11E15244G1 | Rotary encoder, dual channel, incremental quadrate outputs, with switch |
| SW1 | EN | Push button switch, generic, two pins |
| SW2 | BOOT | Push button switch, generic, two pins |
| SW3 | CHORD1 | Push button switch, generic, two pins |
| SW4 | CHORD2 | Push button switch, generic, two pins |
| SW5 | CHORD3 | Push button switch, generic, two pins |
| SW6 | CHORD4 | Push button switch, generic, two pins |
| SW7 | CHORD5 | Push button switch, generic, two pins |
| SW8 | CHORD6 | Push button switch, generic, two pins |
| SW9 | CHORD7 | Push button switch, generic, two pins |
| SW10 | LOOP | Push button switch, generic, two pins |