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Posted to alt.engineering.electrical,sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
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Inkjet ink level sensing?
One source I found says that Canon uses light from an LED--bounced from a
prism at the bottom of the cartridge after ink is depleted--to trigger the "Empty" signal. Epson apparently counts the spurts of ink and calculates the arrival of "empty". I couldn't find how HP do this. Anybody know? Thanks. |
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