Front Panel V2 Assembly Sheet Rev 1

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Parts List

Qty Value RefDes Qty Value RefDes
4 10K R3-R7 32 LED (NOTE 3) DS1-DS32
2 2.2K (NOTE 1) R1,R2 1 HEADER, RT ANG, 2X2 J6
32 560 (NOTE 2) R5,R8-R38 1 HEADER, RT ANG 1X4 J3
4 MCP23017-E/SS U1,U2,U3,U4 1 HEADER, RT ANG, 1x2 J1
32 SW_Push SW1-SW32 1 HEADER, RT ANG, 1x5 J2

Notes

  • Note 1 - 1K ballast LED resistors. Pick value for how bright you want LEDs at operating voltage.
  • Note 2 - R34 and R35 are 2.2K I2C terminators. Needed for 3.3V operation and 400 KHz operation. R36 is INT* pullup.
  • Note 3 - LEDs - I like diffused Orange LEDs. I don't like clear LEDs.
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