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RE: Being one who

It looks like the RPi has several of it's own onboard regulators for 3.3V, 1.8V, 2.5V derived from the 5v "bulk power" supplied by the wall wart. But it also uses 5v directly in other areas including the USB interface.

The Jameco 5V +/- 0.3V spec isn't that bad for what it is powering (with a preference toward the + side rather than lower). According to the USB spec bus power across VBUS and GND should be a nominal 5V +/- 5%.

The data sheet for the Jameco PSU shows 250mV ripple at 1500mA load which is a greater load than the 1000mA the PSU is rated for so the ripple figure should be lower at lower loads. But 250mV is very high.

RPi Power




Edits: 02/16/17 02/16/17 02/16/17

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