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- I need a diode to stop backup batteries (3.2V) from charging when there's an external supply.
It's a mod to a weather station which normally uses primary cells alone. There are four cells, connected as 2X2. I am providing dc power up there for another purpose so I thought it may as well supply the station as well. But I need to protect / isolate the batteries from the DC source with a diode.
I was hoping someone might have an idea about a diode that would supply say 0.5A (in short bursts) without too much V drop. What do people use these days? Germanium, Schottkey?
Or what about a fat capacitor to avoid a sag during the periods of high current? It's a very practical question and someone will know what't the best approach, I'm sure.
I was hoping someone might have an idea about a diode that would supply say 0.5A (in short bursts) without too much V drop. What do people use these days? Germanium, Schottkey?
Or what about a fat capacitor to avoid a sag during the periods of high current? It's a very practical question and someone will know what't the best approach, I'm sure.