I'm building a guitar with a Fishman VMV bridge-mounted piezo pickups, the preamp for which (Powerchip), runs from a 9V battery.
For various reasons, I am looking to power the guitar externally using a mains power adapter. Getting the supply out of the guitar will be done in a similar way to the "X-BATT", for reference.
The problem I have is that when running from a battery, the circuit draws only as much current as it requires, which may fluctuate, but a power adapter supplies a set current.
Is the exact level of current important, or can I measure/estimate and use a set current, or will I need additional circuitry to emulate the battery?
