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greatfet-hardware / jasmine

a lithium polymer battery charging neighbor
BSD 3-Clause "New" or "Revised" License
4 stars 3 forks source link

charge rate indicator LEDs inconsistently illuminated #24

Open mossmann opened 4 years ago

mossmann commented 4 years ago

The blue LEDs in #23 have a forward voltage of 3.9 V, but they are supplied by VBUS which can be as low as 3.6 V when operating on battery power. They fade out as the battery is drained (which might be a cool indicator of battery charge except that we can't count on them to be consistent across all LEDs). The LEDs should have a forward voltage less than 3.6 V.

yhetti commented 4 years ago

Do the charge rate indicators matter if the GF/Jasmine are unplugged and the battery is not actually charging?

mossmann commented 4 years ago

Alternatively we could arrange for the charge rate indicators to only light up when external power is present.