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|Unknown|U14 (Analog MUX) Pin 13 (A0) - 3V rounded square pulses, 2x per second, 2 different periods avg ~75msec?
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|Unknown
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|Unknown
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|Unknown
SP1 cleanup & details
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|4
|1 Hz - U14 (Analog MUX) Pin 9 (S2)
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|5
|+SP1 - 2x4-pin, 0.1" spacing
!Pin
!UseDescription!Notes/ObservationsPin!Description
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|1
| +5VDC||-All from U9
|2
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|3
| +5VDC
|4
|U14 Pin 14 (A1) - 5V, 0.1msec pulse once per second
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|5
| +5VDC
|6
|U14 Pin 15 (A2) - 5V, 0.1msec pulse once per second
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|7
| +5VDC
|8
|U14 Pin 12 (A3) - 3V, 250msec pulse once per second
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