Maybe a flash light!
Schedule 80 3/4 PVC is the perfect size for these cells.
It's pretty simple construction, I used a hole saw to cut a proto board in to a nice circle and soldered on some super bright LED's.
Put a loop of wire on the bottom for the positive contact,
which you really can't see that well in these pics. Drilled through the cap and put a spring in it to make the negative connection.
It's just help together with the interference fit on the PVC. It's my favourite so far, probably because of the size.
I did a little more on the actual mounting of the LED's and the connection to the batteries.
|Drilled holes in a washer and bolted the whole thing together.|
|Just Regular white LED's I did not have any super bright ones.|
|A notch in the top for the bolt in the head.|
|This one has a switch in it.|
|A grove for the negative wire|
The Spring set up
|One Bright Mofo|
I need to work out a better switch, but this is what I had on hand.
more to come