Difference between revisions of "Front Panel Assembly Sheet Rev 1"

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Revision as of 15:08, 20 June 2021

Parts List

Qty Value RefDes Qty Value RefDes
4 10K R33, R36-R38 32 LED, 5mm (NOTE 3) DS0-DS31
32 1K (NOTE 1) R1-R32 1 HEADER, RT ANG, 1x2 J1
3 2.2K (NOTE 2) R34-R36 1 HEADER, RT ANG, 1x5 J2
32 SW_Push SW0-SW31 1 HEADER, RT ANG, 1X4 J3
4 MCP23017-E/SP U1-U4 1 HEADER, RT ANG, 2X2 J4

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 Orange LEDs. I don't like clear LEDs.