Tagged Questions
-1
votes
2answers
96 views
Multiple 2A USB Mains powered chargers [closed]
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 ...
1
vote
1answer
324 views
Is this switching power controller compromise wise?
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 ...
3
votes
3answers
936 views
How practical would a car booster using supercapacitors be?
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 ...
3
votes
1answer
1k views
Can I recharge batteries with a normal AC to DC transformer? [duplicate]
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 ...
3
votes
1answer
582 views
What component of my phone charger produces chirps and how does it do that?
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 ...
8
votes
4answers
794 views
What are the basics of making a rechargeable battery pack?
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 - ...
