G'Day All
I am using some of the chinese DVM's in my vehicle to monitor a solar setup, (volts and amps). However they cannot be used powered directly from the vehicle batteries etc. It occurs to me that mebbe a small double wound transformer used in a switching mode followed by the usual regulation and smoothing etc could be used to feed a small 9v recharge battery and as the supply for the meters. Would that be isolating the supply for the meters or have I missed something ??