I'd like to know why there are no mains-powered chargers that can charge multiple usb devices at, say, 2A and 1A? I'm after something that can charge 2 tablets that ask for 2A and 2 phones on 1A, so ...
TL;DR: Looking for all kinds of advice :-) Especially related to pushing "backwards" power into a MC34063 based step-up switching controller at times. I'm building a device with an AVR ...
Currently car boosters (a portable unit charged of an outlet and then connected to the car electrical system to start a car when the car battery is dead) typically use batteries - lead-acid, Li-Ion or ...
Possible Duplicate: Charging 3 AAs in series My batteries charger is not working, but I have an AC to DC transformer that can output different voltages. If I connect two 1.5v ...
My Nokia cell phone is charged with a very lightweight compact charger similar to this AC-15 (can't find the one I actually use). While the battery is close to empty the charger works silently - just ...
We have a device that runs off of a AC adapter, or a pack of 8 AA batteries. Since in normal use we use both, it would seem to make sense to have the battery pack recharge while using the AC adapter - ...