Iím in a bit of a dilemma, can anyone give me any advice?
I am trying to wire a Digital Panel Ammeter via a shunt which is not the problem, the problem is the power supply for the ammeter, it cannot be from the same source it is measuring otherwise it just shorts out. Is there a device I can use to take the power from the same source, reduce it to 5 volts DC and separate it to power the ammeter? I donít really want to use a separate battery to power the ammeter. The source is the engine battery, thanks in advance.
Results 1 to 4 of 4
29-04-12, 14:04 #1
Digital ammeter power supply - problem
29-04-12, 15:12 #2
"Isolated DC-DC converter" is what you need.
e.g. NME1205S - 200ma at 5V from 10-15V in (15V is the absolute maximum input voltage for this one though).
Many others in a similar vein. Just connect 12V to 2 pins and it gives out a completely isolated 5V from the other 2 (see the datasheet on the above link for which pin is which).
AndyFree guitar lessons: www.justinguitar.com
29-04-12, 15:32 #3Registered User
- Join Date
- May 2007
29-04-12, 16:15 #4
Cheers lads, many thanks.