I discussed this in detail in Cal-Mag for Plants – What Is It and Do You Need It? In summary, plants do need calcium and magnesium in amounts around 100 ppm and 40 ppm respectively. This can come from water, soil, commercial fertilizer or a DIY source. Neutral or alkaline soil usual...
In applica- The unique pocket reference shown in Figure 3 can operate for years on a pair of AAA alkaline cells or a single Lithium coin-cell, as the circuit draws just 10µA supply current. An input capacitor of 1µF as shown should be used when the LT6650 is operated following ...
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