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Normal 0 There were a few Discarded Mobile Phone Batteries lying around the house, so I was thinking how to use them as they had plenty...
Normal 0 33 LED’s of 5mm. One LED 1 watt. A thin PVC sheet to fix the LED’s. An old PVC light case. 3 Discarded Mobile Phone Ba...
Normal 0 Fix the LED’s to the PVC sheet in 3 rows of 11 LED’s. Check the polarity of the LED’s.
Normal 0 Wire the LED’s, Batteries, and Switch as shown in the Circuit diagram. No resistance or Capacitor have been used in this pro...
Normal 0 All the 3 Batteries should be connected in parallel, so that the voltage remains 3.6 volts at all times. Charging the batter...
Normal 0 Your Emergency LED light is ready. Switch ON the 1watt led or the 33 LED’s as you wish. This light is lightweight due to t...
Charging the Batteries with a Li-Ion Battery Charger.
Wire the LED’s, Batteries, and Switch as shown in the Circuit diagram.
No resistance or Capacitor have been used in this project.
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This circuit has LEDs is series. Battery voltage is 3.6v and LEDs asking for 33v???
LEDs chould be in paralell and must have a current limiting resistor or LED driver.
I have changed the Circuit diagram, please check it out. A current limiting resistor is not required here.
Its ok now.
As LED temprature rises when it glows, its current will also increase (I checked it myself), what will happen, LED taking 20 mA current will start taking more current and its life will direase. Its always better to limit the current.
I am using two 1 W LEDs (with current limiting) for fish equarium, they are constantly running since two years (with 3 to 4 hrs rest per day 14600 hrs) nothing happend to them.