Very simply low power charger

Thread Starter

WFC98

Joined Jan 21, 2019
12
It's homework and I assume the battery is a given constraint. No real-world thinking allowed.
This isn't homework, there is as much scope as I need, the bit I'm struggling with is the conversion of the power input from the hand crank to the charging of the battery because its all new to me
 

wayneh

Joined Sep 9, 2010
17,153
This isn't homework, there is as much scope as I need, the bit I'm struggling with is the conversion of the power input from the hand crank to the charging of the battery because its all new to me
In that case, see #8. Spend the parts budget on battery capacity and lose the (relatively expensive) capacitor.
 

Thread Starter

WFC98

Joined Jan 21, 2019
12
Is there definately not possible to charge the battery directly in around two minutes?
Or would that completely destroy such a small battery?
 

Thread Starter

WFC98

Joined Jan 21, 2019
12
A wind up torch I bought has a 80mAh 3.6V battery pack and is being charged at around 200mA.
Is this bad for the battery then?
 

Alec_t

Joined Sep 17, 2013
12,199
Depends on the manufacturer's specified maximum charging rate. If you shorten the life of a battery by charging it at an excessive rate you'll buy more batteries and boost the manufacturer's profits :D.
 
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