Fairfield Circuitry · Modulation

Roger That

9V · ≥30 mA supply · maker

Fairfield Circuitry Roger That power requirements

9V DC · centre negative · needs a supply of at least 30mA
the voltage it ships for · from the maker
“9V 2.1mm 9VDC centre-negative tip, >30 mA … Roger That! was designed to operate using your typical centre negative, regulated 9 VDC power supply.” source
Checked 2026-10-13
9.6V DC · centre negative · draws 30mA
from the maker
“power supply 9 - 9.6VDC … current draw 30mA @ 9.6VDC” source
Checked 2026-10-13

119.38 × 96.52 × 48.26 mm (4.70 × 3.80 × 1.90 in)

Width × depth × height, from the manufacturer.

Each has an output that can power it, checked against its published figure. Plan the whole board to see what runs everything.