40-Pin Raspberry Pi Connector; Optional 5V Fan Connector; Leds - Kauai Labs VMX-pi Reference Manual

VMX-pi Hardware Reference Manual (version 1.10)
Figure 14 VMX-pi circuit board bottom-side

40-pin Raspberry Pi Connector

A 40-pin connector is mounted to the VMX-pi circuit board bottom-side, and is designed to connect to
the GPIO connector on the Raspberry Pi 3 or the Raspberry Pi Zero W.

Optional 5V Fan Connector

5VDC and Ground terminals are included on the VMX-pi circuit board bottom side, and may be used to
power an external fan for cooling system components. The 5VDC on this connector is generated by the
onboard 5V regulator for external devices.

LEDs

LED Color Description
S1 Green MPU-9250 Interrupt Status
S2 Green MPU-9250 Communication Status
3.3V Green Internal Circuitry 3.3V Power Good
Fault Red External Device Power Fault
CAN Green CAN Bus Communication Good
Status
CAL Orange Calibration in progress
Status
Normal State
On
On
On
Off
On (when actively communicating
with CAN bus)
Off (blinks during calibration)
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