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diff --git a/hw/hank/emisar-d3aa/readme.md b/hw/hank/emisar-d3aa/readme.md new file mode 100644 index 0000000..f234dad --- /dev/null +++ b/hw/hank/emisar-d3aa/readme.md @@ -0,0 +1,18 @@ +# Emisar D3AA + +This driver measures battery strength when power is connected, and uses that +info to set a hard limit on brightness when the battery is too weak to handle +full power. + +The number of blinks at power-connect indicates the battery type and strength: + +- 1 blink: Strong Li-ion cell, full power enabled + +- 2 blinks: Strong AA cell, max AA power enabled + (not used, strong AA uses mode 1 with full power enabled) + +- 3 blinks: Weak battery, power severely limited + +The 2-blink mode is not actually used. So it should blink 1 time or 3 times, +depending on the cell strength. + |