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A pair of 9V batteries would easily power these circuits, not requiring you route

wires for power from a central source. Just a thought.

Or a split supply module using a generic 5V walwart as its source. Something like this :

[URL unfurl="true"]https://www.banggood.com/DC-3_3-13V-to-DC-15V-Positive-Negative-Dual-Output-Power-Supply-DC-DC-Step-Up-Boost-Module-Voltage-Converter-Board-p-1654033.html?cur_warehouse=CN&rmmds=search[/URL]

Regards, Dana.