"Dead" Battery Lamp

Step 6 You're done!

It's done! You can use it for anything you need to light. I lit my fish tank at night with it for a neat affect. It is very bright, and lasts very long (as of writing i am on 2 days and counting with no decrease in brightness!). Any suggestions are welcome, and if you make one, please post pictures! If anyone wants to know how it works, simply ask in the comments and I'll put up another slide explaining it.

Comments

[Juanarama]

what if I wanted a slow flash, like a lighthouse (I know a lighthouse does not flash but has that effect because of rotating source)

[rocketman221]

you can buy flashing leds or you could make a simple flasher circuit with a couple of transistors.

[strmrnnr]

You might use the cylon eye circuit for a light house. It could use more power than is available here. Just divide the lights up around the cardinal points and away you go.

[zjharva]

i don't know, you'd probably need a 555 timer circuit

[joinaqd]

how long can the thing stay on for?

[zjharva]

on a dead battery with half a charge, probably 2 days before it gets very dim.

[tammasus]

Hey! that's really cool. Why is the inductor necessary? and the transistor?? is it to boost the power?? ok. Thanks!

[zjharva]

yes, the electricity around the toroid ups the voltage, and the transistor dumps the current to the LEDs very quickly so it looks constant, but is actually flashing very quickly.