[Led display Digital Voltmeter question]

hi,
i already contacted www.beta-dyne.com who make a 9v to 5v dc converter 2watts , 400 ma isolated and they are on their way .
As soon i have them i will post results and my modified board layout.
becouse mostly dc-ac inverters use 12v or 24 v configurations, i will
use 9v to 5v beocuse at 9 v the dvm will work besides the inverter who stop working at 10.7 v. i will feed the dc-dc from lm317 to220 1.5 amp variable regulator at 9.2 volts , so does not matter if is 12v or 24 volts battery bank .this is important becouse i built dc ac inverter up tp 10kw for 110 or 220 vac , and that will be a nice feature

[Led display Digital Voltmeter question]

hi,
i have a dc-ac inverter 3kw 110v from 12v battery bank.
i would like to monitor the battery voltage, but i dont want to use 9v
alkaline battery nor 110ac power supply for power the voltmeter.
becouse i can not feed the vmeter from same source i'm monitoring,
i want to use a circuit to be able to do that , a dc-dc converter or any suggestions.
9v do not last enough for always on situation.
thanks
:)

[Led display Digital Voltmeter question]

thanks MP

a isolated dc-dc converter might work??
somebody can helpme with a low cost circuit dc-dc isolated??
i edit the board file from eagle and added:
on-off-on swch
grid ac led
inverter led
the bridge for ac readings
becouse dc-ac inverters usually have big battery banks , will be nice to power itself the voltmeter.
as soon i finish i will post here
thanks

[Led display Digital Voltmeter question]

hi,
i have an power mosfet inverter dc to ac , works with 24volts
instead of using a battery for the voltmeter, can i use same battery under measuring as source for the circuit it self ??
sorry but i'm jut a hobbyst
thanks