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This I'ble shows how to make a single LED flashlight from a 9v battery, that LASTS MORE THAN 200 HOURS !!! Unlike normal ones which last between 5 to 10 hours.
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Signing UpStep 1Components Needed:
1) 9v battery
2) 9v clip
3) 2k ohm 1/4 watt resistor (even higher wattage would do, like 1/2 watt, which has slightly thicker wires)
Important Note:
Increase resistance to higher value, say 6.7k ohm or 10k ohm, if you are using lower rating led otherwise the led would burn out
or,
decrease it to 1k, if you have a worn out battery.
4) Insulation Tape
5) LED - colour of ur choice
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this ROCKS!
i will def make some.
Mr Steve
reg
ketan
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"May the good belong to all the people in the world.
May the rulers go by the path of justice.
May the best of men and their source always prove to be a blessing.
May all the world rejoice in happiness.
May rain come in time and plentifulness be on Earth.
May this world be free from suffering and the noble ones be free from fears" ---- Vedic blessing
Drilled 4 Green LEDs into a bent L-shaped plastic. 2x taped battery & added a switch.
Beautiful.
Mr. Steve
See the latest Sensor version here:
http://www.instructables.com/id/9-Volt-Single-LED-Sensor-Light-/
reg
ketan
Have a look at my ibles!!!