Woodstock power supply
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01-06-2017, 09:23 AM
Post: #1
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Woodstock power supply
Looking at the woodstock schematic:
Would it be possible to discard the transformer that comes with these calculators and use the cable and plug to provide a rectified 3v or 3.1v supply instead? I'd like to use mains power for a 20-series device without risking burning it out completely. Is a voltage drop on the supply sufficient? Would I also need current limiting? My, albeit limited, understanding of circuits indicates that it needs 2.5v at the battery and there is a single diode drop along the way (i.e. -0.6 to -0.7 v drop). So 3.1v roughly. Am I on track here or way off the mark? Pauli |
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