Ian Canada's PurePi is a compact audiophile power supply module specifically designed for Raspberry Pi based systems to improve sound quality. The PurePi integrates a 5V supercapacitor power supply and a second isolated 3.3V LifePO4 battery rail. Thanks to the use of spring contacts, it is very easy to install a Raspberry Pi or other audio HAT on top of the PurePi, without the need for an additional power supply connector.

Key features:

• 5V supercapacitor power supply with two 100F-2.7V supercapacitors pre-installed. ESR less than 10mΩ.
• Isolated 3.3V power supply on LifePO4 battery, with pre-installed battery cradle for two 18650 cells. ESR below 6mΩ.
• Gold-plated spring contacts to power a Raspberry Pi directly via the GPIO, without adding a connector.
• Works as a stand for a complete audio project. Spikes can be installed, as well as rubber rings, to limit vibrations.
• Only a 5V 2.5A power supply required as input, via USB-C.
• Integrated ON/OFF button. Can be deported to have an external switch.
• ON/OFF control signal for integration into a multi-power supply system as a master ON/OFF control.
• Integrated protection system to prevent battery wear and maintain an adequate electrical signal.
• Ultra-low noise and high dynamic range passive power supply.
• Ultra low ESR MOSFETs controlled by optical isolators to eliminate current leakage.