| General > General Technical Chat |
| Little mini-teardown: Air Mattress DC PUMP |
| (1/1) |
| RJSV:
Just so that you don't have to; I've got the pictures, insides of a 3.7 Volt DC air pump, for camping mattress. On the left is a lithium battery; at 2000 mA-hrs. Switch is on right of photo. With a small control board with medium sized pwr transistor, that handles the charging over USB mini 5 volts. Sorry, that's likely not the exact term, for doing charging off of a wall wart. Spec. is saying takes about 4 hours to charge. Also, the fan-air pump motor should only be run for 6 minutes at a time, due to heating. |
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