MMmm Pi PoE Board for Raspberry Pi

MMmm Pi PoE Board for Raspberry Pi
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Testing

Testing was performed using a Ubiquiti UniFi Switch 48 750W with 802.3af/at PoE+.

As soon as the Ethernet cable was plugged into the MMmm Pi PoE Prototype Board, the Raspberry Pi powered on, and within a few seconds network connectivity was established as normal.

Ubiquiti UniFi Switch 48 750w Port 25 Raspberry Pi 2 with PoE 1.72w

Raspberry Pi 2 power usage: 1.72 watts

The Ubiquiti UniFi Switch reported power usage from a Raspberry Pi 2 varying between 1.66 and 1.72 Watts over several minutes.

Ubiquiti UniFi Switch 48 750w Port 25 Raspberry Pi 2 with PoE and USB Drive 2.22w

Raspberry Pi 2 with USB Flash Drive: 2.22 watts

After plugging in a generic 8GB USB2 Flash Drive into one of the Raspberry Pi 2’s USB ports, power usage increased to between 2.15 and 2.22 Watts. This particular USB Flash Drive appears to draw up to 0.50 Watt extra power.

Voltage Measurement

Voltage Measurement

The regulator produces very close to 5 V DC. The first board tested varied slightly between 5.04 and 5.06 volts, however, the second board tested was exactly 5.00 volts.

The temperature of the regulator was around 43°C (109°F) under normal load and with no peripherals connected, in a room with an ambient air temperature of 22°C (72°F). Obviously the more load the regulator is under, the higher the temperature, and I imagine it could be quite warm at the board’s rated maximum output power of 9 watts.

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