Battery capacity meter using Arduino
You can’t trust batteries these days. Market is flooded with fake ones. Or simply you have reliable rechargeable battery pack and want to know how much of juice it can produce. Probably only one way to know how good your battery is – is to measure its discharge curve. Eric shared his arduino based battery discharge monitor. He monitors battery voltage and discharge current that flows through low value discharge resistor producing some voltage drop. DS1307 RTC keeps track of time which gives pretty precise view of battery discharge characteristics. This isn’t thorough test equipment that will tell battery capacity, because it also depends on current flow and other factors like temperature. But for fast test run this may be a great indicator to sort things out....
Source: Embedds.com - Monday, 13 February
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