I'm building a simple low voltage/current DC power supply (with the initial input coming from an AC/DC 15v wall wart) and want to incorporate in the supply output a cheap, 4 wire digital ammeter which measures current drawn by the power supply load in the range 0-999ma. The wiring diagram for the Ammeter posted by the eBay seller shows 2 ways of wiring and I think I would prefer the 'Independent Power supply' option. I would however want the independent power supply to be disconnected when I powered down the supply.
My question is whether a DC-DC converter isolated power module, such as this one http://www.ebay.co.uk/itm/DC-DC-Con...928240?hash=item464cf66a70:g:AYAAAOSwYmZXHKda could be connected in to the power supply on/off switch to provide an isolated independent power supply for the ammeter?
My question is whether a DC-DC converter isolated power module, such as this one http://www.ebay.co.uk/itm/DC-DC-Con...928240?hash=item464cf66a70:g:AYAAAOSwYmZXHKda could be connected in to the power supply on/off switch to provide an isolated independent power supply for the ammeter?
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