Custom Raspberry Pi Add-on board used as a PoE (power over ethernet) switch for the Galactic Aztec rocket. The board has a single Mini Fit Jr. port for PoE power input and 2 pairs of passthru ethernet ports that can have the PoE power toggled on/off.
Custom EagleCAD parts on this board can be found in the SDSU Rocket Eagle Libraries.
The ethernet ports adhere to the following 10/100 mode B, DC on spares wiring configuration:
| Pin | T568B Color | Function |
|---|---|---|
| 1 | Orange/White | Rx + |
| 2 | Orange | Rx - |
| 3 | Green/White | Tx + |
| 4 | Blue | DC + |
| 5 | Blue/White | DC + |
| 6 | Green | Tx - |
| 7 | Brown/White | DC - |
| 8 | Brown | DC - |
For the Galactic Aztec April 18th, 2015 launch, this board was used in conjunction with the Galactic Aztec Raspberry Pi Add-on: Power board to allow the rocket to be powered by external power provided by the ground station (conserving onboard battery power). Then during pre-launch sequence the PoE power was toggled off, thereby having the rocket use onboard battery power.
| Qty | Name | Description | Part Number | Vendor |
|---|---|---|---|---|
| 2 | RELAY[1,2] | Relay 5V 5A DPST-NC (2 Form B) | Z3640-ND | DigiKey |
| 2 | Q1, Q2 | Transistor NPN 40V 600mA SOT-23-3 | MMBT2222ATPMSCT-ND | DigiKey |
| 2 | R1, R2 | Resistor 1k 1/4W 1% 0603 | RHM1.00KADCT-ND | DigiKey |
| 2 | D1, D2 | Diode 50V 1A SOD-123 | SM4001PL-TPMSCT-ND | DigiKey |
| 4 | RJ45-[1-4] | Jack RJ45 CAT5/CAT5e | 380-1046-ND | DigiKey |
| 1 | Molex Mini Fit Jr. 4-pos Right Angle | WM1352-ND | DigiKey | |
| 2 | D3, D4 | LED Red Vf=1.8V If=2mA 0603 | 475-1195-2-ND | DigiKey |
| 1 | R4 | Resistor 1.8kΩ 1/4W 1% 0603 | P1.8KBYCT-ND | DigiKey |
| 1 | R3 | Resistor 12kΩ 1/4W 1% 0603 | RHM12.0KADCT-ND | DigiKey |
| 1 | Header Stacking 2x20 Tall 23mm | 1979 | Adafruit |