rugedoll Posted August 22, 2004 Report Share Posted August 22, 2004 helo to u all i have a problem maybe u could help me i dont know how a 2 way solar/battery supply for calculator work?how do it swicthes?what are the compenents needed hope u could help me thanks for reading this peace out!! :) Quote Link to comment Share on other sites More sharing options...
audioguru Posted August 22, 2004 Report Share Posted August 22, 2004 Hi Ruge,Welcome to our forum.A calculator's solar/battery supply probably uses a simple two-diodes OR gate. Each diode feeds the calculator's supply, with the solar cell at one diode and the battery at the other. The source with the highest voltage forward-conducts through its diode and the other diode is reversed-biased and therefore disconnects its source.Beware!Many cheap calculators have a label, or photocopy of a solar cell, instead of having a real one! They look good. How can you tell without removing the battery?Why can I purchase a complete solar/battery calculator at a price that is much less than just its replacement battery? When its battery dies, throw it away and buy another one.Just like my PC's printer. I can purchase another complete printer for less cost than just its replacement ink cartridges! Throw away printer? Quote Link to comment Share on other sites More sharing options...
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