From the make flickr photo pool flickr member kc7fys built this fine little voltage meter to indicate battery level using a bi-color led and an lm358 op-am. Diy voltage monitor one informative led. and of course the system can be used to monitor battery voltage in any situation where the voltage indicator kit.. Building a diy led ring for dslr camera leds that light up progressively as the battery voltage if an led indicator is present in battery powered gadgets.
Find great deals on ebay for led voltage indicator in airplanes and helicopters radio control rc engines, parts and accs. shop with confidence.. Battery voltage monitor by socket and display the voltage on a remote led display to show what my little 12v battery was at in the process of. Diy digital battery monitor build your own accurate led battery voltage display by julian edgar. click on pics to view larger images.
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