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Mechanoids

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About This Category

Facets of mechanical devices and automation; machines of all sorts (though mainly man-made) including robots and computers.

You might like to visit 2001: A Space Odyssey (A Shrine), which includes tiny excerpts of HAL's famous utterances...


diagram circuit schematic of automatic laptop power switchover between 12V DC 12VDC solar battery and 240V AC 240VAC mains fallback designed to use no mains power if solar is available 1 DHD.jpg ... diagram circuit schematic solar PV system extant and planned expansion mono 1 DHD.gif

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ThumbnailExhibit Name
Thumbnaildiagram circuit schematic of automatic laptop power switchover between 12V DC 12VDC solar battery and 240V AC 240VAC mains fallback designed to use no mains power if solar is available 1 DHD.jpg (Mechanoids)
Thumbnaildiagram circuit schematic of automatic laptop power switchover between 12V DC 12VDC solar battery and 240V AC 240VAC mains fallback designed to use no mains power if solar is available mono 3 DHD.gif (Mechanoids)
Thumbnaildiagram circuit schematic of automatic laptop power switchover between 12V DC 12VDC solar battery and 240V AC 240VAC mains fallback designed to use no mains power if solar is available rotated mono 1 DHD.gif (Mechanoids)
Thumbnaildiagram circuit schematic of improved DC supply voltage detector for automatic laptop power switchover between 12V DC 12VDC solar battery and 240V AC 240VAC mains fallback 1 DHD.gif (Mechanoids)

This is designed to drop power to the relay coil (and thus switch to mains power) as the voltage drops below 12V, and not power the relay again (to switch back to DC power) until the voltage rises above 13V. Note that the internal voltage reference/threshold is at 1.15V, so there should be a drop of 1V per 100K in the divider network on the left.

[390kB]diagram circuit schematic of improved DC supply voltage detector for automatic laptop power switchover between 12V DC 12VDC solar battery and 240V AC 240VAC mains fallback 1 DHD.tif (Mechanoids)

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Thumbnaildiagram circuit schematic solar PV system extant and planned expansion mono 1 DHD.gif (Mechanoids)

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