Hi, it's time for the annual energy saving contest, every year in Devon Uk a certain School runs a competition, although I now live in Scotland I am allowed to enter as I have won it twice .
This year I am needing some guidance, first the rules.
1) While it dosnt have to be practical it does have to work
2) The big points are for novelty and taking what would be considered a waste product and making it useful.
3) I have to build 3
This year I want to build a +/- 15V PSU from dead batteries, the School collects dead batteries like AA,AAA pp9 etc etc, they have a huge numbers in a tub and they get sold for recycling. So I thought what if I make a 1A capable PSU from them that could adjust upto +/- 15V.
On the face of it I see joule thief circuits, maybe germanium diodes to isolate each battery for monitoring and low drop out regulators.
What problems do you see with this approach? Any sugestions which way to go with it?
I will update some of what I have looked at so far later.
LG
This year I am needing some guidance, first the rules.
1) While it dosnt have to be practical it does have to work
2) The big points are for novelty and taking what would be considered a waste product and making it useful.
3) I have to build 3
This year I want to build a +/- 15V PSU from dead batteries, the School collects dead batteries like AA,AAA pp9 etc etc, they have a huge numbers in a tub and they get sold for recycling. So I thought what if I make a 1A capable PSU from them that could adjust upto +/- 15V.
On the face of it I see joule thief circuits, maybe germanium diodes to isolate each battery for monitoring and low drop out regulators.
What problems do you see with this approach? Any sugestions which way to go with it?
I will update some of what I have looked at so far later.
LG